hasSubset

Check if object has a subset.

Similar: has, hasValue, hasEntry, hasSubset, hasPath.
Similar: subsets, hasSubset, randomSubset.

function hasSubset(x, y, fc, fm)
// x:  an object
// y:  search subset
// fc: compare function (a, b)
// fm: map function (v, k, x)

const object = require('extra-object');

var x = {a: 1, b: 2, c: 3, d: 4};
var y = {b: 2, d: 4};
object.hasSubset(x, y);
// → true

var y = {b: -2, d: -4};
object.hasSubset(x, y);
// → false

object.hasSubset(x, y, (a, b) => Math.abs(a) - Math.abs(b));
// → true

object.hasSubset(x, y, null, v => Math.abs(v));
// → true

References

• Data.List.isSubsequenceOf: Haskell
• List-Extra.isSubsequenceOf: elm