使用JavaScript实现字符串格式化

使用JavaScript实现字符串格式化

    String.prototype.format = function (kwargs) {

        /*

        hello-{n}-{m}

        {'n':'word','m':'!'}

        */

        var res = this.replace(/\{(\w+)\}/g,function (groups,group) {

              return kwargs[group]

        });

        return res

    };

    var info = 'hello-{n}-{m}';

    var dicts = {'n':'word','m':'!'};

    var ret = info.format(dicts);

    console.log(ret)