invoke.js #1

define(['./slice'], function (slice) {

    /**
     * Call `methodName` on each item of the array passing custom arguments if
     * needed.
     */
    function invoke(arr, methodName, var_args){
        if (arr == null) {
            return arr;
        }

        var args = slice(arguments, 2);
        var i = -1, len = arr.length, value;
        while (++i < len) {
            value = arr[i];
            value[methodName].apply(value, args);
        }

        return arr;
    }

    return invoke;
});