The example in this article describes the use of map function in jquery to traverse arrays. Share it with everyone for your reference. The details are as follows:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>map函数</title>
<script src="jquery-1.6.2.min.js" type="text/javascript"></script>
<script type="text/javascript">
/*注意map函数不能处理json格式对象的数组。*/
$(function () {
var arr = [3, 6, 9];
ShowArray(arr);
//调用jquery的map方法 用来将一个数组，转成另一个数组
//var arrChange = $.map(arr, function (item) { return item * 2; });
//ShowArray(arrChange);
//调用自己实现的mymap方法，达到和jquery的map方法一样的功能
var myfunc = function (item) { return item * 2 };
var arrChange = MyMap(arr, myfunc);
ShowArray(arrChange);
});
//自己实现一个类似jquery的map方法
function MyMap(arr, func) {
var newArray = new Array(arr.length);
for (var i = 0; i < arr.length; i++) {
newArray[i] = func(arr[i]);
}
return newArray;
}
function ShowArray(arr) {
var output = "";
for (var i = 0; i < arr.length; i++) {
if (output == "") {
output = arr[i];
}
else {
output += "," + arr[i];
}
}
alert(output);
}
</script>
</head>
<body>
</body>
</html>I hope this article will be helpful to everyone’s jQuery programming.
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