How to access a string array with a string variable? Javascript

Question

I need access to h_00 with other variable, any idea?

var json = '{"h_00":[["bus",28,"F"],["bus",71,"M"],["car",16,"M"]]}';
var arr_data = jQuery.parseJSON(json);

var access = "h_00";

alert(arr_data.access[0]);

access[0] will translate to "h" in your case. arr_data.access[0] will try to access a method or variable access under arr_data which does not exist. — Sumurai8
– Sumurai8, Commented Jul 5, 2013 at 17:22
@Sumurai8: You are right that access[0] would return 'h' but arr_data.access[0] would throw an error because arr_data.access is undefined. access in arr_data.access has nothing to do with the variable access. — Felix Kling
– Felix Kling, Commented Jul 5, 2013 at 17:24
@FelixKling Hmmm true, I was not complete enough in that comment. — Sumurai8
– Sumurai8, Commented Jul 5, 2013 at 17:27

Paul · Accepted Answer · 2013-07-05 17:16:32Z

2

Use bracket notation:

arr_data[access][0]; // ["bus", 28, "F"]

Also that is not called a string array. It is an object.

answered Jul 5, 2013 at 17:16

Paul

142k28 gold badges285 silver badges272 bronze badges

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

Comments

mohkhan · Accepted Answer · 2013-07-05 17:16:48Z

0

alert(arr_data[access][0]); should work for you...

answered Jul 5, 2013 at 17:16

mohkhan

12.3k2 gold badges27 silver badges27 bronze badges

Comments

gustavodidomenico · Accepted Answer · 2013-07-05 17:18:57Z

0

If you that standard JSON parser it will accomplish your task:

var json = '{"h_00":[["bus",28,"F"],["bus",71,"M"],["car",16,"M"]]}';
var obj = JSON.parse(json);

You can simply access your property:

obj.h_00

And obj.h_00[0]

Will output:

["bus", 28, "F"]

answered Jul 5, 2013 at 17:18

gustavodidomenico

4,6811 gold badge37 silver badges50 bronze badges

1 Comment

Felix Kling Over a year ago

"I need access to h_00 with other variable" probably means that the property name is stored in a variable. Considering that the OP tried arr_data.access, I think we can assume that they know about dot notation.

Collectives™ on Stack Overflow

How to access a string array with a string variable? Javascript

3 Answers 3

Comments

Comments

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related