What do json curly brackets mean?

1. { } curly brackets indicate the definition of an object. In most cases, it must have paired attributes and values, or functions.

For example: var LangShen = {"Name":"Langshen","AGE":"28"};

The above declares an object named "LangShen" with multiple attributes Or functions are separated by, (comma), because they are attributes of the object,

, so when accessing, you should use . (dot) to access layer by layer: LangShen.Name, LangShen.AGE, of course we can also use Accessed in array mode, such as: LangShen["Name"], LangShen["AGE"], the result is the same.

This writing method is often used in JSON data structure. In addition, it is also often used when we usually write function groups, such as:

var LangShen = {

      Name = function(){

                                                                                                            out out out out out out out Out of                 out ’s ’ ’s ’ ’ through ’'s ’ through through through through ’’s ’ through through through ’’s'‐‐to ‐‐‐‐‐ww and t

## Return "28";

}

}

calls are similar, because it is a function group, so add (), such as: Alert (Alert LangShen.Name() );

2. [ ] brackets represent an array, which can also be understood as an array object.

For example: var LangShen = [ "Name", "LangShen", "AGE", "28" ];

Obviously, each value or function is independent. The values ​​are only separated by, (comma). Because it is an array object, it is equal to:

var LangShen = Array( "Name", "LangShen", "AGE", "28" );

When accessed, it is the same as an array, alert(LangShen[0]);

3. { } and [ ] are used together. As we mentioned earlier, { } is an object, [ ] is an array, we can form an object array, such as:

var LangShen = { "Name":"Langshen",

"MyWife":[ "LuLu","26" ],

                                            "MySon":[{"Name":"Son1"},{"Name":"Son2"},{"Name":"Son3"}]

}

From the above structure, the first item in an object is an attribute, the second item is an array, and the third item is an array containing multiple objects. When called, it is also accessed layer by layer. The properties of the object are superimposed with . (dot), and the array is accessed with [subscript].

For example: alert(LangShen.MySon[1].Name);

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