Code Based on jquery cyclic map function

Look at the code. Copy codeThe Code is as follows: var map = {
Place Name: ["Beijing", "Tianjin", "Shanghai"],
Ethnicity: ["Han", "Tibetan", "Uygur"]
};

$. Each (map, function (key, values ){
Console. log (key );
$ (Values). each (function (){
Console. log ("\ t" + this );
});
});

If firebug is installed, the console outputs the following tree structure:

Place Name
Beijing
Tianjin
Shanghai
Ethnicity
Han Nationality
Tibetan
Uygur

Note: The difference between $ (). each and $. each in jquery is that the former can only traverse arrays, and the latter can traverse arrays and objects.

Note: In the sinobook project, place names are classified by type. The background package contains a map (key is a relational type, and value is a list), which can be output in the frontend using the preceding method.