javascript format 字符串 函数

函数实现以下：

function format(string) {

    var args = arguments;

    var pattern = new RegExp("%([1-" + arguments.length + "])", "g");

    return String(string).replace(pattern, function (match, index) {

        return args[index];

    });

};

用法以下：

console.log(format("And the %1 want to know whose %2 you %3", "papers", "shirt", "wear"));