swc/ecmascript/minifier/tests/compress/fixture/projects/yui/14/input.js

YArray.indexOf = Lang._isNative(Native.indexOf) ? function (array, value, from) {
    return Native.indexOf.call(array, value, from);
} : function (array, value, from) {
    // http://es5.github.com/#x15.4.4.14
    var len = array.length;

    from = +from || 0;
    from = (from > 0 || -1) * Math.floor(Math.abs(from));

    if (from < 0) {
        from += len;

        if (from < 0) {
            from = 0;
        }
    }

    for (; from < len; ++from) {
        if (from in array && array[from] === value) {
            return from;
        }
    }

    return -1;
};