@extra-array/is-prefix/compare.js

Checks if array starts with a prefix.

import id from './_id';
import cmp from './_cmp';
/**
 * Compares two arrays.
 * @param x an array
 * @param y another array
 * @param fc compare function (a, b)
 * @param fm map function (v, i, x)
 * @returns x<y: -1, x=y: 0, x>y: 1
 */
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);
}
export default compare;
//# sourceMappingURL=compare.js.map