javascript - Adding custom variables to an object -

this question has answer here:

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suppose have object obj has variables in it. want add new variable has name gave parameter. example:

var obj= {   number:8 }  function addfield(field_name,obj) {   //some magical code here } 

if call

addfield('name',obj); 

i want able do

obj.name='apple' 

after calling function.

any ideas?

use square brackets notation:

obj[field_name] = value; 

ref: http://www.jibbering.com/faq/faq_notes/square_brackets.html#vid