jQuery 剧场版 你必须知道的javascript

width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }

 

访问属性

一般我们使用”.”来分层次的访问对象的属性:

alert(objectA.name);

.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, “Courier New”, courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }

 

嵌套属性

对象的属性同样可以是任何javascript对象:

var objectB = objectA;
objectB.other = objectA;
//此时下面三个值相当, 并且改变其中任何一个值其余两个值都改变

objectA.name;
objectB.name;
objectB.other.name;

 

使用索引

如果objectA上有一个属性名称为”school.college”, 那么我们没法通过”.”访问,因为”objectA.school.college”语句是指寻找objectA的school属性对象的college属性.

这种情况我们需要通过索引设置和访问属性:

     objectA[“school.college”] = “BITI”;
     alert(objectA[“school.college”]);

.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, “Courier New”, courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }

 

下面几个语句是等效的:

    objectA[“school.college”] = “BITI”;
    var key = “school.college”
    alert(objectA[“school.college”]);
    alert(objectA[“school” + “.” + “college”]);
    alert(objectA[key]);

 

JSON 格式语法

JSON是指Javascript Object Notation, 即Javascript对象表示法.