How to define variables and loop using JSON in JavaScript

How to define variables in json and then loop in JavaScript

var data =

[

{state: "In Progress", title: "Environmental Improvement and Civilized Persuasion", type: "Community Development", peoplenum:2000},

{state: "Recruiting", title: "Mingshan District Joins Hands with Public Welfare Society", type: "Volunteer Service", peoplenum:2},

{state: "In Progress", title: "Environmental Improvement and Civilized Persuasion", type: "Social Welfare", peoplenum:2000}

];

var html='';

html = '';';

html = '

';';

for (var i=0; i{

html = ''; ';

html = '';

html = '' data[i].title '

';

html = 'Recruitment:' data[i].peoplenum 'people';

html = ' ' data[i].state;

html = '

}

html = '

html = '

$(＂#div1＂).append(html);

How does js turn a json string into an array

The first

JSON.parse(jsonString)

Second type

eval("(" jsonString ")")

The third type

var obj=(function ToJSON(o){

if(typeof(o)==＂string＂)try{return new Function(＂return ＂ o)();}catch(e){return null;}

})(＂[{name:'zhangsan',age:'24'},{name:'lisi',age:'30'},{name:'wangwu',age:'16'}, {name:'tianqi',age:'7'}]＂);

for(var b in obj)alert(obj[b].name);

js parses json files to obtain data

According to the returned string, it can be seen that it is in the form of a js array spliced ​​into multiple jsons.

If only a string is returned, the string must be converted into a js object.

Use Jquery's $.each() method to loop through the js array to retrieve the data of each json object.

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str = '[{"key":"value","keys":[{"key1":"value1","key2":"value2"},{"key1":"value3","key2 ":"value4"}],"obj":{"id":1,"msg":"success"}}]';

str_json = eval("(" str ")"); //Convert string into js object

$.each(str_json,fucntion(a,b){

alert(a); //Pop up the key of the array

alert(b.id);//Pop up the data to be taken out

});

js loop array to delete json with empty value

Expand All

var result = [];

var item =[

{

"resource_id":'',

"text":'',

"content_desc": '',

"smallImg":'',

"existFlag":true

},

{

"resource_id":'7886',

"text":'454',

"content_desc": '45',

"smallImg":'132',

"existFlag":true

},

{

"resource_id":'7886',

"text":'454',

"content_desc": '45',

"smallImg":'132',

"existFlag":true

},

{

"resource_id":'aaa',

"text":'bbb',

"content_desc": 'ccc',

"smallImg":'ddd',

"existFlag":true

},{

"resource_id":'',

"text":'',

"content_desc": '',

"smallImg":'',

"existFlag":true

}

];

for(var i=0;i var obj=item[i];

if(!!obj["resource_id"]){

result.push(obj);

}

}

console.log(result);

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