<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
</head>
<body>
<script type="text/javascript">
/*
1."{v1}你好，我是{v2},我今年{v3}岁了"; {v1:Cupid,v2:Tina,v3:18};
2.'{0}你好，我是{1},我今年{2}岁了';['Cupid', 'Tina', 18];
3.'{0}你好，我是{1},我今年{2}岁了';'Cupid', 'Tina', 18;
*/
String.prototype.format = function (obj) {
var that = this;
if (typeof obj == "object") {
for (var attr in obj) {
that = that.replace("{" + attr + "}", obj[attr]);
}
} else {
//var a = arguments;
//alert(a instanceof Array)==》false
//把参数放到数组里面 slice() 方法可从已有的数组中返回选定的元素。
var arr = [].slice.call(arguments, 1);
//调用自己
return format(str, arr);
}
return that;
}
function format(str, obj) {
if (typeof obj == "object") {
for (var attr in obj) {
str = str.replace("{" + attr + "}", obj[attr]);
}
} else {
//var a = arguments;
//alert(a instanceof Array)==》false
//把参数放到数组里面 slice() 方法可从已有的数组中返回选定的元素。
var arr = [].slice.call(arguments, 1);
//调用自己
format(str, arr);
}
return str;
}
var str = '{v1}你好，我是{v2},我今年{v3}岁了';
var obj = { v1: 'Cupid', v2: 'Tina', v3: 18 };
console.log(format(str, obj));// Cupid你好，我是Tina,我今年18岁了;
var ss = str.format(obj);
console.log(ss);/// Cupid你好，我是Tina,我今年18岁了;
var str1 = '{0}你好，我是{1},我今年{2}岁了';
var obj1 = ['Cupid', 'Tina', 18];
console.log(format(str1, obj1));
var ss1 = str1.format(obj1);
console.log(ss1);
var str2 = '{0}你好，我是{1},我今年{2}岁了';
var obj2 = "";
/*
对象：{ v1: 'Cupid', v2: 'Tina', v3: 18 }
Json:{ "v1": "Cupid", "v2": "Tina", "v3": "18" }
注意：对象和JSON的区别
*/
</script>
</body>
</html>
