javascript concat string to object

Question

Please check code below. Here all variable values are static.

var o = { level_a:{}, level_b:{}, . . . .};

var levelVar = "b";

var selected_tab = 'level'+'_'+levelVar; \\level_b

var result = o.selected_tab;

Here you can see var o is object and var levelVar and selected_tab are string. Now I expect I should get value of o.level_b inside result, but its not working becuse we can not concat string to object.

Please help.

Denys Séguret · Accepted Answer · 2012-11-12 07:59:08Z

8

Use this notation :

result = o[selected_tab];

More generally, when you have var obj={a:'b'}, you can access the property a using both obj.a and obj['a'].

Here's a MDN reference about the use of objects and properties.

answered Nov 12, 2012 at 7:59

Denys Séguret

384k90 gold badges813 silver badges780 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Santosh S Over a year ago

I am so fool . .. never thought in that way . . .anyways thanks !

Marco Francke Over a year ago

don't forget to check with o.hasOwnProperty(selected_tab) to avoid erros ;)

Collectives™ on Stack Overflow

javascript concat string to object

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related