正则_二

<h3>replace</h3>
<p>功能：str.replace(/a/g,"*") 所有的a用*来替换</p>

<script>
		var str = "abcdeafghiajkamsna";
		var i = 0;
		var result = str.replace(/a/g, function(res){ //res对应匹配规则匹配的元素
			i++;
			return res;
		})
	</script>
	<script>
		var str1 = "88452489";
		var arr1 = ["零","一","二","三","四","五","六","七","八","九"];

		var result1 = str1.replace(/\d/g, function(){ 
			//三个参数 arguments[0],arguments[1],arguments[2]   input[index] index input
			//当前匹配的字符串
			//当前匹配的索引
			//当前匹配的总的对象
			return arr1[arguments[0]];
		})
	</script>
	<script>
		var str2 = "My name is {0}. I am {1} years old. I am in class {2} grade {3}.";
		var arr2 = ["刘先坤", 16, 3, 5];
		var reg2 = /{(\d+)}/g;
		var result2 = str2.replace(reg2, function(){
			arguments[1]
			return arr2[arguments[1]];
		}); 
	</script>
	<script>
		var reg3 = /<div>.+<\/div>/;
		reg3.exec(document.body.innerHTML);
	</script>
	<script>
		var str4 = "我是{{name}},年龄{{age}},性别{{sex}}";
		var data = {name:"姓名", age: 18};
		render(str4, data);
		function render(str, data){
			var reg = /{{(.+?)}}/g;
			var str2 = str.replace(reg, function(){
				return data[arguments[1]];
			});
			return str2;
		} 
	</script>