Check if two maps are equal.
Similar: compare, isEqual.
function isEqual(x, y, fc, fm) // x: a map // y: another map // fc: compare function (a, b) // fm: map function (v, k, x)
const map = require('extra-map'); var x = new Map([['a', 1], ['b', 2]]); var y = new Map([['a', 1], ['b', 2]]); map.isEqual(x, y); // → true var y = new Map([['a', 11], ['b', 12]]); map.isEqual(x, y); // → false map.isEqual(x, y, (a, b) => (a % 10) - (b % 10)); // → true map.isEqual(x, y, null, v => v % 10); // → true
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