当前位置: 首页 > 网络学院 > 客户端脚本教程 > JavaScript > JS For...In

JavaScript
JS 字符串
JS Date
JS数组,JS Array
JS Boolean
JS Math
JS HTML DOM
JS Browser
JS Cookies
JS 校验
JS Animation
JS Image Maps
JS Timing
JS 建立对象
JS 摘要
JS 实例
JS 对象实例
JS DOM 实例
JS数组对象参考
JS布尔对象参考
JS日期对象参考

JavaScript 中的 JS For...In


出处:互联网   整理: 软晨网(RuanChen.com)   发布: 2009-03-01   浏览: 1014 ::
收藏到网摘: n/a

The for...in statement is used to loop (iterate) through the elements of an array or through the properties of an object.
for...in声明通过一组元素或对象属性进行循环(重复)。


Examples
举例

For...In statement
How to use a for...in statement to loop through the elements of an array.
怎样通过一组元素来使用for...in声明进行循环。


JavaScript For...In Statement
JS的for...in声明

The for...in statement is used to loop (iterate) through the elements of an array or through the properties of an object.
for...in声明通过一组元素或对象属性进行循环(重复)。

The code in the body of the for ... in loop is executed once for each element/property.
在for...in循环躯干部分里的代码针对每个元素/属性执行一次。

Syntax
语法

for (variable in object)
{
code to be executed }

The variable argument can be a named variable, an array element, or a property of an object.
变量可以是数组或是对象的属性。

Example
举例

Using for...in to loop through an array:
数组使用for...in循环:

<html>

<body>
<script type="text/javascript">
var x
var mycars = new Array()
mycars[0] = "Saab"
mycars[1] = "Volvo"
mycars[2] = "BMW"

for (x in mycars)
{
document.write(mycars[x] + "<br />")
}

</script>
</body>
</html>

评论 (0) All

登陆 | 还没注册?