JS代码如下:
/**
* js中的string.format两种调用方式
*
* @param
* @arrange (512.笔记) jb51.cc
var template1="我是{0},今年{1}了";
var template2="我是{name},今年{age}了";
var result1=template1.format("loogn",22);
var result2=template2.format({name:"loogn",age:22});
两个结果都是"我是loogn,今年22了"
*/
String.prototype.format = function (args) {
var result = this;
if (arguments.length > 0) {
if (arguments.length == 1 && typeof (args) == "object") {
for (var key in args) {
if (args[key] != undefined) {
var reg = new RegExp("({" + key + "})","g");
result = result.replace(reg,args[key]);
}
}
}
else {
for (var i = 0; i < arguments.length; i++) {
if (arguments[i] != undefined) {
//var reg = new RegExp("({[" + i + "]})","g");//这个在索引大于9时会有问题,谢谢何以笙箫的指出
var reg = new RegExp("({)" + i + "(})",arguments[i]);
}
}
}
}
return result;
}
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