@extra-array/is-equal/index.js

Checks if two arrays are equal.

'use strict';
function id(v) {
    return v;
}
function cmp(a, b) {
    return a < b ? -1 : (a > b ? 1 : 0);
}
function compare(x, y, fc = null, fm = null) {
    var fc = fc || cmp, fm = fm || id;
    var X = x.length, Y = y.length;
    for (var i = 0, I = Math.min(X, Y); i < I; i++) {
        var u1 = fm(x[i], i, x);
        var v1 = fm(y[i], i, y);
        var c = fc(u1, v1);
        if (c !== 0)
            return c;
    }
    return Math.sign(X - Y);
}
function isEqual(x, y, fc = null, fm = null) {
    var X = x.length, Y = y.length;
    return X === Y && compare(x, y, fc, fm) === 0;
}
module.exports = isEqual;