@extra-array/union-update/index.mjs

Gives values present in any array.

function id(v) {
    return v;
}
function cmp(a, b) {
    return a < b ? -1 : (a > b ? 1 : 0);
}
function from$$1(x) {
    return Array.isArray(x) ? x : [...x];
}
function from(vs, fm = null) {
    return new Set(fm ? from$$1(vs).map(fm) : vs);
}
function unionMap$(x, y, fm = null) {
    var s = from(x, fm);
    var fm = fm || id, i = -1;
    for (var v of y) {
        var v1 = fm(v, ++i, y);
        if (!s.has(v1))
            x.push(v);
    }
    return x;
}
function unionDual$(x, y, fc = null, fm = null) {
    var fc = fc || cmp, fm = fm || id;
    var x1 = x.map(fm), j = -1;
    y: for (var v of y) {
        var v1 = fm(v, ++j, y);
        for (var u1 of x1)
            if (fc(u1, v1) === 0)
                continue y;
        x.push(v);
    }
    return x;
}
function union$(x, y, fc = null, fm = null) {
    if (fc)
        return unionDual$(x, y, fc, fm);
    else
        return unionMap$(x, y, fm);
}
export { union$ as default };