Movatterモバイル変換


[0]ホーム

URL:


Skip to content
DEV Community
Log in Create account

DEV Community

Cover image for JSON + Javascript Cheatsheet.
manushifva
manushifva

Posted on

     

JSON + Javascript Cheatsheet.

Content

Convert array to JSON

varmyArr={key:value,key2:value2};varmyJSON=JSON.stringify(myArr);
Enter fullscreen modeExit fullscreen mode

Result:

'{"key":"value","key2":"value2"}';
Enter fullscreen modeExit fullscreen mode

Parse JSON (convert from JSON to array)

varmyJSON='{"key":"value","key2":"value2"}';varmyArr=JSON.parse(myJSON);
Enter fullscreen modeExit fullscreen mode

Result:

{key:value,key2:value2};
Enter fullscreen modeExit fullscreen mode

Count JSON array length

varmyJSON='{"key":"value","key2":"value2"}';varmyArr=JSON.parse(myJSON);varjsonLength=myArr.length;
Enter fullscreen modeExit fullscreen mode

Result:

2
Enter fullscreen modeExit fullscreen mode

Do loop with JSON array

varmyJSON='{"key":"value","key2":"value2"}';varmyArr=JSON.parse(myJSON);myArr.forEach(function(nowItem){// Do things here})
Enter fullscreen modeExit fullscreen mode

Get data from JSON array

varmyJSON='{"key":"value","key2":"value2"}';varmyArr=JSON.parse(myJSON);console.log(myArr["key2"]);
Enter fullscreen modeExit fullscreen mode

Result:

value2
Enter fullscreen modeExit fullscreen mode

Add item to JSON array

varmyJSON='{"key":"value","key2":"value2"}';varmyArr=JSON.parse(myJSON);myArr["key3"]="value3";
Enter fullscreen modeExit fullscreen mode

myArr result:

{key:"value",key2:"value2",key3:"value3"}
Enter fullscreen modeExit fullscreen mode

Remove item from JSON array

varmyJSON='{"key":"value","key2":"value2"}';varmyArr=JSON.parse(myJSON);deletemyArr["key2"];
Enter fullscreen modeExit fullscreen mode

myArr result:

{"key":"value"}
Enter fullscreen modeExit fullscreen mode

Top comments(0)

Subscribe
pic
Create template

Templates let you quickly answer FAQs or store snippets for re-use.

Dismiss

Are you sure you want to hide this comment? It will become hidden in your post, but will still be visible via the comment'spermalink.

For further actions, you may consider blocking this person and/orreporting abuse

App developer => Web developer => Game developer.Contact: manu@sandbottle.net
  • Location
    West Java, Indonesia
  • Work
    Developer at Sandbottle Game Studio
  • Joined

More frommanushifva

DEV Community

We're a place where coders share, stay up-to-date and grow their careers.

Log in Create account

[8]ページ先頭

©2009-2025 Movatter.jp