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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Just a blog</title>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<meta name="description">
<meta property="og:type" content="website">
<meta property="og:title" content="Just a blog">
<meta property="og:url" content="http://yoursite.com/index.html">
<meta property="og:site_name" content="Just a blog">
<meta property="og:description">
<meta name="twitter:card" content="summary">
<meta name="twitter:title" content="Just a blog">
<meta name="twitter:description">
<link rel="stylesheet" href="/css/style.css" type="text/css">
</head>
<body>
<div id="container">
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</a>
<hgroup>
<h1 class="header-author"><a href="/">Mark</a></h1>
</hgroup>
<p class="header-subtitle">Writing 1000 Words a Day Changed My Life</p>
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<ul>
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<nav id="mobile-nav">
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<div class="slider-trigger"></div>
<h1 class="header-author js-mobile-header hide">Mark</h1>
</div>
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<header id="header" class="inner">
<div class="profilepic">
<img lazy-src="undefined" class="js-avatar">
</div>
<hgroup>
<h1 class="header-author">Mark</h1>
</hgroup>
<p class="header-subtitle">Writing 1000 Words a Day Changed My Life</p>
<nav class="header-menu">
<ul>
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</ul>
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<div class="body-wrap">
<article id="post-2015A股" class="article article-type-post" itemscope itemprop="blogPost">
<div class="article-meta">
<a href="/2015/08/26/2015A股/" class="article-date">
<time datetime="2015-08-26T04:59:28.000Z" itemprop="datePublished">2015-08-26</time>
</a>
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<h1 itemprop="name">
<a class="article-title" href="/2015/08/26/2015A股/">2015A股</a>
</h1>
</header>
<div class="article-entry" itemprop="articleBody">
<p>15 今年入市的新股民既是倒霉的又是幸运的，把几十年老股民都没遇到过的千股涨停，千股跌停，千股停牌，千股涨停到跌停，千股跌停到涨停全都过了一把瘾，在今年这么变态的市场中还能活下来的人，后面会快速变的成熟，也会有一批人较之前入市的股民提前10年成为大师，逆境中人的成长速度是惊人的！</p>
</div>
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</article>
<article id="post-JS操作HTML属性" class="article article-type-post" itemscope itemprop="blogPost">
<div class="article-meta">
<a href="/2015/08/26/JS操作HTML属性/" class="article-date">
<time datetime="2015-08-26T04:59:28.000Z" itemprop="datePublished">2015-08-26</time>
</a>
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<div class="article-inner">
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<a class="article-title" href="/2015/08/26/JS操作HTML属性/">JS操作HTML属性</a>
</h1>
</header>
<div class="article-entry" itemprop="articleBody">
<h3 id="属性读写操作的注意事项">属性读写操作的注意事项</h3><ul>
<li>JS属性中不允许出现”-“，例如font-size改为fontSize</li>
<li>class是JS里面的保留字，在JS作用Class要用ClassName</li>
<li>所有相对路径都别拿来做判断（例如img里的src，href）</li>
<li>颜色值不要拿来做判断（因为有red #f00 rgb(250,0,0)等不同写法）</li>
<li>innerHTML的值不要拿来做判断</li>
<li>IE6 7 8中表单元素的type更改不了，不支持，会报错</li>
<li>在有些浏览器中，直接更改Float值可能不支持。在JS里，可以用IE(styleFloat)和非IE（cssfloat）来区别对待</li>
<li>不能做判断的东西，可以创造一个开关，利用布尔值来实现</li>
</ul>
</div>
<div class="article-info article-info-index">
<div class="article-tag tagcloud">
<ul class="article-tag-list"><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/JS/">JS</a></li></ul>
</div>
<div class="article-category tagcloud">
<a class="article-category-link" href="/categories/Study/">Study</a>
</div>
<div class="clearfix"></div>
</div>
</div>
</article>
<article id="post-JS数据类型转换" class="article article-type-post" itemscope itemprop="blogPost">
<div class="article-meta">
<a href="/2014/10/31/JS数据类型转换/" class="article-date">
<time datetime="2014-10-31T02:41:47.000Z" itemprop="datePublished">2014-10-31</time>
</a>
</div>
<div class="article-inner">
<header class="article-header">
<h1 itemprop="name">
<a class="article-title" href="/2014/10/31/JS数据类型转换/">JS数据类型转换</a>
</h1>
</header>
<div class="article-entry" itemprop="articleBody">
<h3 id="JS数据类型转换">JS数据类型转换</h3><ul>
<li>把字符串转化为数字,转化不了的就是NaN<ul>
<li>Number</li>
</ul>
</li>
</ul>
<figure class="highlight openscad"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line">console.<span class="built_in">log</span><span class="params">(Number<span class="params">(<span class="string">"100"</span>)</span>)</span> <span class="comment">//100 </span></span><br><span class="line">console.<span class="built_in">log</span><span class="params">(Number<span class="params">(<span class="string">""</span>)</span>)</span> <span class="comment">//0 </span></span><br><span class="line">console.<span class="built_in">log</span><span class="params">(Number<span class="params">(<span class="literal">false</span>)</span>)</span> <span class="comment">//0 </span></span><br><span class="line">console.<span class="built_in">log</span><span class="params">(Number<span class="params">(<span class="string">" "</span>)</span>)</span> <span class="comment">//0 </span></span><br><span class="line">console.<span class="built_in">log</span><span class="params">(Number<span class="params">([<span class="number">123</span>])</span>)</span> <span class="comment">//123</span></span><br><span class="line">console.<span class="built_in">log</span><span class="params">(Number<span class="params">(null)</span>)</span> <span class="comment">//0</span></span><br><span class="line">console.<span class="built_in">log</span><span class="params">(Number<span class="params">(<span class="literal">undef</span>ined)</span>)</span> <span class="comment">//NaN</span></span><br><span class="line">console.<span class="built_in">log</span><span class="params">(Number<span class="params">({})</span>)</span> <span class="comment">//NaN</span></span><br><span class="line">console.<span class="built_in">log</span><span class="params">(Number<span class="params">(function<span class="params">()</span>{})</span>)</span> <span class="comment">//NaN</span></span><br><span class="line">console.<span class="built_in">log</span><span class="params">(Number<span class="params">('<span class="number">100</span>px')</span>)</span> <span class="comment">//NaN</span></span><br></pre></td></tr></table></figure>
<ul>
<li>parseInt和parseFloat 一个只能转出整数部分，一个能转出小数部分</li>
<li><figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> a = <span class="string">'100px'</span>;</span><br><span class="line">alert(<span class="built_in">parseInt</span>(a)); <span class="comment">//100</span></span><br><span class="line"></span><br><span class="line"><span class="keyword">var</span> b = <span class="string">'100px123456789'</span>;</span><br><span class="line">alert(<span class="built_in">parseInt</span>(b)); <span class="comment">//100</span></span><br><span class="line"></span><br><span class="line"><span class="keyword">var</span> d = <span class="string">'-100px'</span>;</span><br><span class="line">alert(<span class="built_in">parseInt</span>(d)); <span class="comment">//-100 parseInt还是认加减号的</span></span><br><span class="line"></span><br><span class="line"><span class="keyword">var</span> e = <span class="string">' 100px'</span>;</span><br><span class="line">alert(<span class="built_in">parseInt</span>(e)); <span class="comment">//100 parseInt也是认空格的</span></span><br><span class="line"></span><br><span class="line"><span class="keyword">var</span> f = <span class="string">'000000100px'</span>;</span><br><span class="line">alert(<span class="built_in">parseInt</span>(f)); <span class="comment">//100</span></span><br><span class="line"></span><br><span class="line"><span class="keyword">var</span> g = <span class="string">'12.34元'</span>;</span><br><span class="line">alert(<span class="built_in">parseInt</span>(g)); <span class="comment">//12 parseInt只能转出整数</span></span><br><span class="line"><span class="keyword">var</span> c = <span class="literal">true</span>;</span><br><span class="line">alert(<span class="built_in">parseInt</span>(c)); <span class="comment">//NaN</span></span><br><span class="line"></span><br><span class="line"><span class="comment">//parseInt也不能用于转函数等</span></span><br></pre></td></tr></table></figure>
</li>
<li><p>parseInt和parseFloat配合使用，来判断是整数还是小数</p>
</li>
</ul>
<figure class="highlight dart"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> <span class="built_in">num</span> = <span class="string">'200.345'</span>;</span><br><span class="line"><span class="keyword">if</span>(parseInt(<span class="built_in">num</span>) == parseFloat(<span class="built_in">num</span>)) {</span><br><span class="line"> alert(<span class="built_in">num</span> + <span class="string">'是整数'</span>);</span><br><span class="line">} <span class="keyword">else</span> {</span><br><span class="line"> alert(<span class="built_in">num</span> + <span class="string">'是小数'</span>);</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<ul>
<li>隐形类型转化<ul>
<li>-*/%可以将字符串转化为数字</li>
<li>+号可以将数字转换为字符串</li>
<li>++ –可以将字符串转化为数字</li>
<li><> 可以将字符串转化为数字</li>
<li>！ 可以将数据类型转化为布尔型</li>
<li>==</li>
</ul>
</li>
</ul>
</div>
<div class="article-info article-info-index">
<div class="article-tag tagcloud">
<ul class="article-tag-list"><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/JS/">JS</a></li></ul>
</div>
<div class="article-category tagcloud">
<a class="article-category-link" href="/categories/Study/">Study</a>
</div>
<div class="clearfix"></div>
</div>
</div>
</article>
<article id="post-函数传参" class="article article-type-post" itemscope itemprop="blogPost">
<div class="article-meta">
<a href="/2014/10/27/函数传参/" class="article-date">
<time datetime="2014-10-27T02:41:47.000Z" itemprop="datePublished">2014-10-27</time>
</a>
</div>
<div class="article-inner">
<header class="article-header">
<h1 itemprop="name">
<a class="article-title" href="/2014/10/27/函数传参/">函数传参</a>
</h1>
</header>
<div class="article-entry" itemprop="articleBody">
<h3 id="理解函数传参">理解函数传参</h3><blockquote>
<p>函数的参数是放在 argument里面，可以看做arguments是参数的载体</p>
</blockquote>
<figure class="highlight livecodeserver"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">sum</span>(){ </span></span><br><span class="line"> console.<span class="built_in">log</span>(arguments); </span><br><span class="line">}; </span><br><span class="line"><span class="built_in">sum</span>(<span class="number">1</span>); </span><br><span class="line"><span class="built_in">sum</span>(<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>); </span><br><span class="line"><span class="comment">/*js中的函数无传统意义的重载*/</span> </span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">sum</span>(<span class="title">a</span>, <span class="title">b</span>){ </span></span><br><span class="line"> <span class="constant">return</span> <span class="operator">a</span> + b; </span><br><span class="line">} </span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">sum</span>(<span class="title">a</span>, <span class="title">b</span>, <span class="title">c</span>){ </span></span><br><span class="line"> <span class="constant">return</span> <span class="operator">a</span> + b + c; </span><br><span class="line">} </span><br><span class="line"><span class="built_in">sum</span>(<span class="number">1</span>, <span class="number">2</span>);<span class="comment"> //出错 </span></span><br><span class="line"><span class="built_in">sum</span>(<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>); </span><br><span class="line"><span class="comment">/*用arguemnts实现重载*/</span> </span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">newSum</span>(){ </span></span><br><span class="line"> var <span class="built_in">sum</span> = <span class="number">0</span>; </span><br><span class="line"> <span class="keyword">for</span>(var i = <span class="number">0</span>; i< arguments.<span class="built_in">length</span>; i++){ </span><br><span class="line"> <span class="built_in">sum</span> += arguments[i]; </span><br><span class="line"> } </span><br><span class="line"> <span class="constant">return</span> <span class="built_in">sum</span>; </span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<blockquote>
<p>函数重载： 几个相同函数名+不同函数参数 = 可以实现不同功能<br>JS不支持函数重载，后定义的函数会把之前的同名的函数覆盖</p>
</blockquote>
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<article id="post-函数返回值-return详解以及应用" class="article article-type-post" itemscope itemprop="blogPost">
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<a href="/2014/10/25/函数返回值-return详解以及应用/" class="article-date">
<time datetime="2014-10-25T02:41:47.000Z" itemprop="datePublished">2014-10-25</time>
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<a class="article-title" href="/2014/10/25/函数返回值-return详解以及应用/">函数返回值-return详解以及应用</a>
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<h3 id="函数返回值-return详解以及应用">函数返回值-return详解以及应用</h3><ul>
<li>return返回值：函数+括号就相当于得到了该函数里return后面的值</li>
<li>所有函数默认返回值是：undefined</li>
<li>可返回：数字、布尔值、字符串、函数、对象（obj、[]、{}、null）、undefined</li>
<li>return之后 代码不执行</li>
</ul>
<p>几个例子</p>
<ul>
<li><p>例子1 弹出 function(){alert(1)}</p>
<figure class="highlight openscad"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">alert fn1<span class="params">()</span>; </span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">fn1</span><span class="params">()</span>{</span> </span><br><span class="line"> return <span class="function"><span class="keyword">function</span><span class="params">()</span>{</span> </span><br><span class="line"> alert<span class="params">(<span class="number">1</span>)</span>; </span><br><span class="line"> };</span><br><span class="line">};</span><br></pre></td></tr></table></figure>
</li>
<li><p>例子2 弹出 1； </p>
<figure class="highlight openscad"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">alert fn1<span class="params">()</span><span class="params">()</span>;</span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">fn1</span><span class="params">()</span>{</span></span><br><span class="line"> return <span class="function"><span class="keyword">function</span><span class="params">()</span>{</span></span><br><span class="line"> alert<span class="params">(<span class="number">1</span>)</span>;</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
</li>
<li><p>例子3 弹出10</p>
<figure class="highlight openscad"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">alert fn1<span class="params">()</span><span class="params">(<span class="number">10</span>)</span>; </span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">fn1</span><span class="params">()</span>{</span> </span><br><span class="line"> return <span class="function"><span class="keyword">function</span><span class="params">(a)</span>{</span> </span><br><span class="line"> alert<span class="params">(a)</span>; </span><br><span class="line"> } </span><br><span class="line">}</span><br></pre></td></tr></table></figure>
</li>
<li><p>例子4 弹出30</p>
<figure class="highlight openscad"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">alert fn1<span class="params">(<span class="number">20</span>)</span><span class="params">(<span class="number">10</span>)</span>; </span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">fn1</span><span class="params">(a)</span>{</span> </span><br><span class="line"> return <span class="function"><span class="keyword">function</span><span class="params">(b)</span>{</span> </span><br><span class="line"> alert<span class="params">(a + b)</span>; </span><br><span class="line"> } </span><br><span class="line">}</span><br></pre></td></tr></table></figure></li>
</ul>
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<a class="article-title" href="/2014/10/21/JS基础知识/">JS基础知识</a>
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<h2 id="JS的基础知识ECMAScript">JS的基础知识ECMAScript</h2><h3 id="JS引入方式">JS引入方式</h3><ul>
<li>内部引用</li>
</ul>
<figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="title">script</span>></span><span class="undefined">alert(1)</span><span class="tag"></<span class="title">script</span>></span></span><br></pre></td></tr></table></figure>
<ul>
<li>外部引用</li>
</ul>
<figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="title">script</span> <span class="attribute">src</span>=<span class="value">""</span>></span><span class="undefined"></span><span class="tag"></<span class="title">script</span>></span></span><br></pre></td></tr></table></figure>
<h3 id="JS语法">JS语法</h3><ul>
<li>定义变量</li>
<li>语句以分号结尾</li>
<li>变量名以￥、字母、_开头，其他字符可以是数字，区分大小写</li>
<li>注释方式 </li>
</ul>
<figure class="highlight gherkin"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">/<span class="keyword">*</span>这是注释<span class="keyword">*</span>/</span><br></pre></td></tr></table></figure>
<h3 id="基本调试">基本调试</h3><ul>
<li>审查元素，打开控制台</li>
<li>console.log();</li>
<li>alert();</li>
</ul>
<h3 id="数据类型">数据类型</h3><blockquote>
<p>typeof可以用来判断数据类型</p>
</blockquote>
<ul>
<li>HTML标签类型：<ul>
<li>block</li>
<li>inline-block</li>
<li>inline</li>
<li>table</li>
<li>…</li>
</ul>
</li>
<li><p>JS中的数据类型:</p>
<ul>
<li>数字 Number(包括NaN)</li>
<li>布尔型</li>
<li>字符串</li>
<li>对象(包括obj、[]、{}、null)</li>
<li>undefined</li>
</ul>
</li>
<li><p>Null和undefined有什么区别:</p>
<ul>
<li>null表示没有对象，明确此处不应该有值</li>
<li>变量被声明了，但是没有赋值时，就==undefined</li>
<li>调用函数时，应该提供的参数没有提供，该参数==undefined</li>
<li>对象没有赋值的属性，该属性的值==undefined</li>
<li>函数没有返回值，默认返回==undefined</li>
</ul>
</li>
</ul>
<h3 id="基本语句">基本语句</h3><ul>
<li>if语句</li>
<li>for语句</li>
<li>do-while语句</li>
</ul>
<figure class="highlight cpp"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">var i = <span class="number">0</span>; </span><br><span class="line"><span class="keyword">do</span>{ </span><br><span class="line"> i += <span class="number">2</span>; </span><br><span class="line">}<span class="keyword">while</span>(i < <span class="number">10</span>); </span><br><span class="line">console.<span class="built_in">log</span>(i);</span><br></pre></td></tr></table></figure>
<ul>
<li>while</li>
</ul>
<figure class="highlight cpp"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">var i = <span class="number">0</span>; </span><br><span class="line"><span class="keyword">while</span> (i < <span class="number">10</span>) { </span><br><span class="line"> i += <span class="number">2</span>; </span><br><span class="line"> console.<span class="built_in">log</span>(i); </span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<ul>
<li><p>for-in语句 </p>
<blockquote>
<p>用于循环输出对象里的值，例如Json</p>
</blockquote>
</li>
<li><p>break、continue</p>
<blockquote>
<p>用于循环语句中，当break时，跳出循环，结束循环。当continue时，跳出本次循环，继续下一次循环</p>
</blockquote>
</li>
<li><p>switch</p>
<blockquote>
<p>判断语句，if else的简化版</p>
</blockquote>
</li>
</ul>
<figure class="highlight cpp"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">switch</span>(<span class="literal">true</span>){ </span><br><span class="line"> <span class="keyword">case</span> score >= <span class="number">90</span>: </span><br><span class="line"> console.<span class="built_in">log</span>(<span class="string">'优'</span>); </span><br><span class="line"> <span class="keyword">break</span>; </span><br><span class="line"> <span class="keyword">case</span> score >= <span class="number">70</span>: </span><br><span class="line"> console.<span class="built_in">log</span>(<span class="string">'良'</span>); </span><br><span class="line"> <span class="keyword">break</span>; </span><br><span class="line"> <span class="keyword">default</span>: </span><br><span class="line"> console.<span class="built_in">log</span>(<span class="string">'差'</span>); </span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<ul>
<li>函数<ul>
<li>定义方式</li>
<li>带参数的函数</li>
<li>函数的调用</li>
<li>函数的作用域</li>
</ul>
</li>
</ul>
<h3 id="运算符">运算符</h3><ul>
<li><p>递增递减 – ++ </p>
<figure class="highlight kotlin"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line"><span class="variable"><span class="keyword">var</span> a</span> = <span class="number">10</span>;</span><br><span class="line"><span class="variable"><span class="keyword">var</span> c</span> = ++a; <span class="comment">//a自己加1，再赋值给c</span></span><br><span class="line"><span class="variable"><span class="keyword">var</span> d</span> = a++; <span class="comment">// a赋值给d, 再自己加1，</span></span><br><span class="line"><span class="variable"><span class="keyword">var</span> b</span> = 'hello'; </span><br><span class="line">b += 'kevin'; <span class="comment">// b = b + 'kevin'; b的值是hello kevin</span></span><br></pre></td></tr></table></figure>
</li>
<li><p>非与或 ！ && ||</p>
</li>
<li>乘法* 除法/ 求余%<ul>
<li>对于乘除减 非number先转化为number，如果转化失败，则返回NaN</li>
</ul>
</li>
<li>加法 + <ul>
<li>对于加，任何与字符串相加会转化成字符串</li>
</ul>
</li>
</ul>
<figure class="highlight openscad"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line">var a = <span class="number">10</span>,</span><br><span class="line"> b = <span class="string">"2"</span>,</span><br><span class="line"> c = <span class="literal">true</span>,</span><br><span class="line"> d = <span class="literal">false</span>,</span><br><span class="line"> e = null,</span><br><span class="line"> f = 'hello';</span><br><span class="line">console.<span class="built_in">log</span><span class="params">( a + a )</span>; <span class="comment">//20</span></span><br><span class="line">console.<span class="built_in">log</span><span class="params">( a + b )</span>; <span class="comment">//102</span></span><br><span class="line">console.<span class="built_in">log</span><span class="params">( a + c )</span>; <span class="comment">//11</span></span><br><span class="line">console.<span class="built_in">log</span><span class="params">( d + c )</span>; <span class="comment">//1</span></span><br><span class="line">console.<span class="built_in">log</span><span class="params">( e + f )</span>; <span class="comment">//nullhello</span></span><br><span class="line">console.<span class="built_in">log</span><span class="params">( a + f )</span>; <span class="comment">//10hello</span></span><br><span class="line">console.<span class="built_in">log</span><span class="params">( f + <span class="params">(a + a)</span> )</span>; <span class="comment">//hello20</span></span><br></pre></td></tr></table></figure>
<ul>
<li><p>关系><</p>
<ul>
<li>number 直接比较</li>
<li>string 直接比较首字母的asc码</li>
<li>如果一个是number,把另外一个转化为number 比较</li>
</ul>
</li>
<li><p>三目运算</p>
<ul>
<li>var max=(num1>num2)?num1:num2</li>
</ul>
</li>
</ul>
<h3 id="字符串操作">字符串操作</h3><ul>
<li>长度.length</li>
<li><p>截取 subStr/subString/slice</p>
<figure class="highlight kotlin"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><span class="variable"><span class="keyword">var</span> str</span> = <span class="string">"hello world"</span>;</span><br><span class="line"><span class="variable"><span class="keyword">var</span> sub1</span> = str.subStr(<span class="number">1</span>, <span class="number">3</span>); <span class="comment">// 第一个是开始位置， 第二个是长度 ell</span></span><br><span class="line"><span class="variable"><span class="keyword">var</span> sub2</span> = str.subString(<span class="number">1</span>, <span class="number">3</span>); <span class="comment">// 第一个是开始位置，第二个是结束位置，长度为第二个－第一个 el</span></span><br><span class="line"><span class="variable"><span class="keyword">var</span> sub3</span> = str.slice(<span class="number">1</span>, <span class="number">3</span>); <span class="comment">// 同上 允许负参</span></span><br></pre></td></tr></table></figure>
</li>
<li><p>查找 search/replace/match</p>
<figure class="highlight lasso"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><span class="built_in">var</span> str = <span class="string">"hello my world"</span>;</span><br><span class="line"><span class="built_in">var</span> s1 = str<span class="built_in">.</span>search(<span class="string">'my'</span>); <span class="comment">//6 找不到为-1</span></span><br><span class="line"><span class="built_in">var</span> s2 = str<span class="built_in">.</span>replace(<span class="string">'my'</span>, <span class="string">'your'</span>); <span class="comment">//</span></span><br><span class="line"><span class="built_in">var</span> s3 = str<span class="built_in">.</span><span class="keyword">match</span>(<span class="string">'my'</span>); <span class="comment">//返回匹配的数组</span></span><br></pre></td></tr></table></figure>
</li>
<li><p>大小写 toLowerCase()/toUpperCase()</p>
<figure class="highlight openscad"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">var <span class="built_in">str</span> = <span class="string">"Hello"</span>;</span><br><span class="line"><span class="built_in">str</span>.toUpperCase<span class="params">()</span>;</span><br><span class="line"><span class="built_in">str</span>.toLowerCase<span class="params">()</span>;</span><br></pre></td></tr></table></figure>
</li>
<li><p>找到某个字符第一次出现的位置，返回asc码 charAt()/charCodeAt()</p>
</li>
</ul>
<h3 id="数组操作">数组操作</h3><h3 id="JSON操作">JSON操作</h3>
</div>
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</article>
<article id="post-JQ节点操作" class="article article-type-post" itemscope itemprop="blogPost">
<div class="article-meta">
<a href="/2014/04/03/JQ节点操作/" class="article-date">
<time datetime="2014-04-03T11:07:43.000Z" itemprop="datePublished">2014-04-03</time>
</a>
</div>
<div class="article-inner">
<header class="article-header">
<h1 itemprop="name">
<a class="article-title" href="/2014/04/03/JQ节点操作/">JQ节点操作</a>
</h1>
</header>
<div class="article-entry" itemprop="articleBody">
<ul>
<li>prev() </li>
<li>next()</li>
<li>prevAll()</li>
<li>nextAll() </li>
<li>siblings()</li>
</ul>
<p>例子：<br><figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br></pre></td><td class="code"><pre><span class="line"><span class="doctype"><!DOCTYPE html></span></span><br><span class="line"><span class="tag"><<span class="title">html</span> <span class="attribute">lang</span>=<span class="value">"en"</span>></span></span><br><span class="line"><span class="tag"><<span class="title">head</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">meta</span> <span class="attribute">charset</span>=<span class="value">"UTF-8"</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">title</span>></span>节点的选择<span class="tag"></<span class="title">title</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">script</span> <span class="attribute">src</span>=<span class="value">"jquery-1.11.1.js"</span>></span><span class="undefined"></span><span class="tag"></<span class="title">script</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">script</span>></span><span class="javascript"></span><br><span class="line"> $(<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>{</span><br><span class="line"> <span class="comment">//$('span').next().css('background', 'red'); //p, h1</span></span><br><span class="line"> <span class="comment">//$('span').prev().css('background', 'red'); //div, p</span></span><br><span class="line"> <span class="comment">//$('p').nextAll().css('background', 'red'); //p标签下面的所有标签</span></span><br><span class="line"> <span class="comment">//$('p').prevAll().css('background', 'red'); //p标签之前的所有标签</span></span><br><span class="line"> <span class="comment">//$('p').siblings().css('background', 'red'); //找p标签所有的兄弟节点</span></span><br><span class="line"> <span class="comment">//参数筛选功能(可以有参数)</span></span><br><span class="line"> <span class="comment">//$('p').siblings('h2').css('background', 'red'); //找p标签所有的兄弟节点中的h2节点</span></span><br><span class="line"> <span class="comment">//$('span').next('h1').css('background', 'red'); </span></span><br><span class="line"> <span class="comment">//$('span').next('h2').css('background', 'red'); //两个span的下一个都没有h2的，所以就没有</span></span><br><span class="line"> });</span><br><span class="line"> </span><span class="tag"></<span class="title">script</span>></span></span><br><span class="line"><span class="tag"></<span class="title">head</span>></span></span><br><span class="line"><span class="tag"><<span class="title">body</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">div</span>></span>div<span class="tag"></<span class="title">div</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">span</span>></span>span<span class="tag"></<span class="title">span</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">p</span>></span>p<span class="tag"></<span class="title">p</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">span</span>></span>span<span class="tag"></<span class="title">span</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">h1</span>></span>h1<span class="tag"></<span class="title">h1</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">h2</span>></span>h2<span class="tag"></<span class="title">h2</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">h2</span>></span>h2<span class="tag"></<span class="title">h2</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">h3</span>></span>h3<span class="tag"></<span class="title">h3</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">em</span>></span>em<span class="tag"></<span class="title">em</span>></span></span><br><span class="line"><span class="tag"></<span class="title">body</span>></span></span><br><span class="line"><span class="tag"></<span class="title">html</span>></span></span><br></pre></td></tr></table></figure></p>
<ul>
<li>first()</li>
<li>last()</li>
<li>slice() //截取一部分元素, 起始-结束（不包括结束位置）</li>
<li>children() </li>
<li>find() //可以找子孙节点，必须得有参数</li>
</ul>
<p>例子：<br><figure class="highlight dust"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br></pre></td><td class="code"><pre><span class="line"><span class="xml"><span class="doctype"><!DOCTYPE html></span></span><br><span class="line"><span class="tag"><<span class="title">html</span> <span class="attribute">lang</span>=<span class="value">"en"</span>></span></span><br><span class="line"><span class="tag"><<span class="title">head</span>></span></span><br><span class="line"><span class="tag"><<span class="title">meta</span> <span class="attribute">charset</span>=<span class="value">"UTF-8"</span>></span></span><br><span class="line"><span class="tag"><<span class="title">title</span>></span>节点的选择<span class="tag"></<span class="title">title</span>></span></span><br><span class="line"><span class="tag"><<span class="title">script</span> <span class="attribute">src</span>=<span class="value">"jquery-1.11.1.js"</span>></span><span class="undefined"></span><span class="tag"></<span class="title">script</span>></span></span><br><span class="line"><span class="tag"><<span class="title">script</span>></span><span class="javascript"></span><br><span class="line"> <span class="comment">// eq(0) == first();</span></span><br><span class="line"> $(<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span></span></span><span class="expression">{</span><br><span class="line"> /<span class="end-block">/ </span>$('<span class="variable">li</span>')<span class="variable">.first</span>()<span class="variable">.css</span>('<span class="variable">background</span>', '<span class="variable">red</span>'); //选择第一个</span><br><span class="line"> /<span class="end-block">/ </span>$('<span class="variable">li</span>')<span class="variable">.last</span>()<span class="variable">.css</span>('<span class="variable">background</span>', '<span class="variable">red</span>'); //选择最后一个</span><br><span class="line"> /<span class="end-block">/ </span>$('<span class="variable">li</span>')<span class="variable">.slice</span>(1, 3)<span class="variable">.css</span>('<span class="variable">background</span>', '<span class="variable">red</span>'); //得到的其实是从<span class="variable"><span class="keyword">eq</span></span>(1)开始到<span class="variable"><span class="keyword">eq</span></span>(2)结束</span><br><span class="line"> /<span class="end-block">/ </span>$('<span class="variable">li</span>')<span class="variable">.slice</span>(1)<span class="variable">.css</span>('<span class="variable">background</span>', '<span class="variable">red</span>'); //如果在<span class="variable">slice</span>里面只写起始位置不写结束位置，那么就是从起始位置开始，一直到最后一个元素</span><br><span class="line"> //$('<span class="variable">ul</span>')<span class="variable">.children</span>()<span class="variable">.css</span>('<span class="variable">background</span>', '<span class="variable">red</span>'); //找到<span class="variable">ul</span>的所有子节点，但是孙子节点是找不到的</span><br><span class="line"> /<span class="end-block">/ </span>$('<span class="variable">ul</span>')<span class="variable">.children</span>('<span class="variable">div</span>')<span class="variable">.css</span>('<span class="variable">background</span>', '<span class="variable">red</span>'); /<span class="end-block">/children</span>()可以过滤筛选</span><br><span class="line"> /<span class="end-block">/ </span>$('<span class="variable">ul</span>')<span class="variable">.find</span>('<span class="variable">p</span>')<span class="variable">.css</span>('<span class="variable">background</span>', '<span class="variable">red</span>'); //可以用<span class="variable">find</span>找<span class="variable">ul</span>之下的所有节点中匹配的节点，<span class="variable">find</span>查找的范围比<span class="variable">children</span>更加广泛</span><br><span class="line"> }</span><span class="xml"><span class="undefined">)</span><br><span class="line"></span><span class="tag"></<span class="title">script</span>></span></span><br><span class="line"><span class="tag"></<span class="title">head</span>></span></span><br><span class="line"><span class="tag"><<span class="title">body</span>></span></span><br><span class="line"><span class="tag"><<span class="title">ul</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">li</span>></span></span><br><span class="line"> 1111</span><br><span class="line"> <span class="tag"><<span class="title">p</span>></span>pppp<span class="tag"></<span class="title">p</span>></span></span><br><span class="line"> <span class="tag"></<span class="title">li</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">li</span>></span>1111<span class="tag"></<span class="title">li</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">li</span>></span>1111<span class="tag"></<span class="title">li</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">li</span>></span>1111<span class="tag"></<span class="title">li</span>></span></span><br><span class="line"> <span class="tag"><<span class="title">div</span>></span>div<span class="tag"></<span class="title">div</span>></span></span><br><span class="line"><span class="tag"></<span class="title">ul</span>></span></span><br><span class="line"><span class="tag"></<span class="title">body</span>></span></span><br><span class="line"><span class="tag"></<span class="title">html</span>></span></span></span><br></pre></td></tr></table></figure></p>
<ul>
<li>parent() </li>
<li>parents() </li>
<li>closest() ★★★★★ //找当前元素的最近的满足条件的祖先节点(只能找到一个元素,也包括自身)</li>
</ul>
</div>
<div class="article-info article-info-index">
<div class="article-tag tagcloud">
<ul class="article-tag-list"><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/jq/">jq</a></li></ul>
</div>
<div class="article-category tagcloud">
<a class="article-category-link" href="/categories/Study/">Study</a>
</div>
<div class="clearfix"></div>
</div>
</div>
</article>
<article id="post-JS判断数据类型" class="article article-type-post" itemscope itemprop="blogPost">
<div class="article-meta">
<a href="/2014/03/03/JS判断数据类型/" class="article-date">
<time datetime="2014-03-03T11:07:43.000Z" itemprop="datePublished">2014-03-03</time>
</a>
</div>
<div class="article-inner">
<header class="article-header">
<h1 itemprop="name">
<a class="article-title" href="/2014/03/03/JS判断数据类型/">JS判断数据类型</a>
</h1>
</header>
<div class="article-entry" itemprop="articleBody">
<h3 id="判断是否数字类型">判断是否数字类型</h3><figure class="highlight dart"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> <span class="built_in">num</span> = <span class="number">9</span>; </span><br><span class="line">typeof <span class="built_in">num</span> ===<span class="string">'number'</span></span><br></pre></td></tr></table></figure>
<h3 id="判断是否字符串">判断是否字符串</h3><figure class="highlight rust"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">var <span class="keyword">str</span> =<span class="string">'hello</span> world'; </span><br><span class="line"><span class="keyword">typeof</span> <span class="keyword">str</span> ===<span class="string">'string</span>'</span><br></pre></td></tr></table></figure>
<h3 id="判断是否布尔">判断是否布尔</h3><figure class="highlight actionscript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> flag =<span class="literal">true</span>; </span><br><span class="line"><span class="keyword">typeof</span> flag ===<span class="string">'boolean'</span>;</span><br></pre></td></tr></table></figure>
<h3 id="判断是否是对象">判断是否是对象</h3><ul>
<li><p>是否是函数</p>
<figure class="highlight actionscript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">sum</span><span class="params">()</span></span>{}; </span><br><span class="line"><span class="keyword">typeof</span> sum ===<span class="string">"function"</span></span><br></pre></td></tr></table></figure>
</li>
<li><p>是否是数组</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> arr=[]; </span><br><span class="line">alert(arr <span class="keyword">instanceof</span> <span class="built_in">Array</span>)</span><br></pre></td></tr></table></figure>
</li>
<li><p>是否是JSON</p>
<figure class="highlight groovy"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">obj = {<span class="string">a:</span><span class="number">1</span>,<span class="string">b:</span><span class="number">2</span>} </span><br><span class="line">alert(typeof obj ===<span class="string">'object'</span> && obj+<span class="string">''</span> ===<span class="string">'[object Object]'</span>)</span><br></pre></td></tr></table></figure>
</li>
</ul>
</div>
<div class="article-info article-info-index">
<div class="article-tag tagcloud">
<ul class="article-tag-list"><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/js/">js</a></li></ul>
</div>
<div class="article-category tagcloud">
<a class="article-category-link" href="/categories/Study/">Study</a>
</div>
<div class="clearfix"></div>
</div>
</div>
</article>
<article id="post-hello-world" class="article article-type-post" itemscope itemprop="blogPost">
<div class="article-meta">
<a href="/1940/10/24/hello-world/" class="article-date">
<time datetime="1940-10-24T02:26:18.955Z" itemprop="datePublished">1940-10-24</time>
</a>
</div>
<div class="article-inner">
<header class="article-header">
<h1 itemprop="name">
<a class="article-title" href="/1940/10/24/hello-world/">Hello World</a>
</h1>
</header>
<div class="article-entry" itemprop="articleBody">
<p>Welcome to <a href="http://hexo.io/" target="_blank" rel="external">Hexo</a>! This is your very first post. Check <a href="http://hexo.io/docs/" target="_blank" rel="external">documentation</a> for more info. If you get any problems when using Hexo, you can find the answer in <a href="http://hexo.io/docs/troubleshooting.html" target="_blank" rel="external">troubleshooting</a> or you can ask me on <a href="https://github.com/hexojs/hexo/issues" target="_blank" rel="external">GitHub</a>.</p>
<h2 id="Quick_Start">Quick Start</h2><h3 id="Create_a_new_post">Create a new post</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$ hexo new <span class="string">"My New Post"</span></span><br></pre></td></tr></table></figure>
<p>More info: <a href="http://hexo.io/docs/writing.html" target="_blank" rel="external">Writing</a></p>
<h3 id="Run_server">Run server</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$ hexo server</span><br></pre></td></tr></table></figure>
<p>More info: <a href="http://hexo.io/docs/server.html" target="_blank" rel="external">Server</a></p>
<h3 id="Generate_static_files">Generate static files</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$ hexo generate</span><br></pre></td></tr></table></figure>
<p>More info: <a href="http://hexo.io/docs/generating.html" target="_blank" rel="external">Generating</a></p>
<h3 id="Deploy_to_remote_sites">Deploy to remote sites</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$ hexo deploy</span><br></pre></td></tr></table></figure>
<p>More info: <a href="http://hexo.io/docs/deployment.html" target="_blank" rel="external">Deployment</a></p>
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