angularjs string format

用惯了C#的string.format，在angularjs中还不太习惯字符串的拼接，还好可以自定义String.Format

String.format = function() {
    if( arguments.length ==  )
        return null;

    var str = arguments[];
    for(var i=;i<arguments.length;i++) {
        var re = new RegExp('\\{' + (i-) + '\\}','gm');
        str = str.replace(re, arguments[i]);
    }
    return str;
}

var a = "this is {0} test for {1}{2}";
alert(String.format(a, "a","me"."!")); 

来源：http://www.cnblogs.com/hwade/articles/867767.html