intersection$

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Subhajit Sahu edited this page Jun 12, 2020 · 18 revisions

Gives entries present in both objects. 🏃 📼 📦 🌔 📒

Similar: union, intersection, difference, symmetricDifference, isDisjoint.

object.intersection(x, y, [fn]);
// x:  an object
// y:  another object
// fn: combine function (a, b)

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

var x = new Map([['a', 1], ['b', 2], ['c', 3], ['d', 4]]);
var y = new Map([['b', 20], ['c', 30], ['e', 50]]);
map.intersection$(x, y);
// Map(2) { 'b' => 2, 'c' => 3 }

x;
// Map(2) { 'b' => 2, 'c' => 3 }

var x = new Map([['a', 1], ['b', 2], ['c', 3], ['d', 4]]);
map.intersection$(x, y, (a, b) => b);
// Map(2) { 'b' => 20, 'c' => 30 }

references