'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;
            }
        }
    });