'use strict';

define(
    [
    ], function () {

        return {

            startsWith: function (str, starts) {
                if (starts === '') {
                    return true;
                }
                if (str == null || starts == null) {
                    return false;
                }
                str = String(str);
                starts = String(starts);
                return str.length >= starts.length && str.slice(0, starts.length) === starts;
            },

            endsWith: function (str, ends) {
                if (ends === '') {
                    return true;
                }
                if (str == null || ends == null) {
                    return false;
                }
                str = String(str);
                ends = String(ends);
                return str.length >= ends.length && str.slice(str.length - ends.length) === ends;
            }
        }
    });