@extra-array/search-value/index.js

Finds first index of a value.

'use strict';
function id(v) {
    return v;
}
function cmp(a, b) {
    return a < b ? -1 : (a > b ? 1 : 0);
}
function searchValue(x, v, fc = null, fm = null) {
    var fc = fc || cmp, fm = fm || id;
    var v1 = fm(v, 0, null), i = -1;
    for (var u of x) {
        var u1 = fm(u, ++i, x);
        if (fc(u1, v1) === 0)
            return i;
    }
    return -1;
}
module.exports = searchValue;