intersection$

Obtain entries present in both objects.

Alternatives: intersection, intersection$.
Similar: intersectionKeys, intersection.
Similar: isDisjoint, union, intersection, difference, symmetricDifference.

function intersection$(x, y, fc)
// x:  an object (updated)
// y:  another object
// fc: combine function (a, b)

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

var x = {a: 1, b: 2, c: 3, d: 4};
var y = {b: 20, c: 30, e: 50};
object.intersection$(x, y);
// → { b: 2, c: 3 }

x;
// → { b: 2, c: 3 }

var x = {a: 1, b: 2, c: 3, d: 4};
object.intersection$(x, y, (a, b) => b);
// → { b: 20, c: 30 }

References

• Data.Set.intersection: Haskell
• Set.intersection: Python
• _.intersection: lodash
• _.intersectionBy: lodash
• _.intersectionWith: lodash
• Array.intersect: sugarjs