JS 格式化字符串

 var xxx = format("a{0}b{1}c", "试一下", "我看行");
 console.log(xxx)

function format(source, params) {
            if (arguments.length === 1) {
                return function () {
                    var args = $.makeArray(arguments);
                    args.unshift(source);
                    return $.validator.format.apply(this, args);
                };
            }
            if (arguments.length > 2 && params.constructor !== Array) {
                params = $.makeArray(arguments).slice(1);
            }
            if (params.constructor !== Array) {
                params = [params];
            }
            $.each(params, function (i, n) {
                source = source.replace(new RegExp("\\{" + i + "\\}", "g"), function () {
                    return n;
                });
            });
            return source;
        };