Extract a value from json inside json string

Question

var a = '{"test_cmd": "pybot  -args : {\"custom-suite-name\" : \"my-1556\"}}'
b = a.match("\"custom-suite-name\" : \"([a-zA-Z0-9_\"]+)\"")
console.log(b)

I have a json string inside json string.

I like to extract the property custom-suite-name's value using the regex.

Output must be,

my-1556.

But the return value b has no matches/null value.

There is a space before the colon in your input.

Jongware
– Jongware

2015-09-14 17:35:13 +00:00
Commented Sep 14, 2015 at 17:35 — Jongware
– Jongware, Commented Sep 14, 2015 at 17:35

Barmar · Accepted Answer · 2015-09-14 17:54:30Z

3

Don't use a regexp to parse JSON, use JSON.parse.

var obj = JSON.parse(a);
var test_cmd = obj.test_cmd;
var args_json = test_cmd.replace('pybot  -args : ', '');
var args = JSON.parse(args_json);
var custom_suite = args.custom_suite_name;

answered Sep 14, 2015 at 17:54

Barmar

789k57 gold badges555 silver badges669 bronze badges

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

Comments

Avinash Raj · Accepted Answer · 2015-09-14 17:35:33Z

1

It's better to put your regex within / slashes. NOte that,

There is a space exists before colon.
No need to escape double quotes.
Include - inside the character class because your value part contain hyphen also.

Code:

> a.match(/"custom-suite-name" : "([a-zA-Z0-9_-]+)"/)[1]
'my-1556'
> a.match(/"custom-suite-name"\s*:\s*"([a-zA-Z0-9_-]+)"/)[1]
'my-1556'

answered Sep 14, 2015 at 17:35

Avinash Raj

175k32 gold badges247 silver badges289 bronze badges

Collectives™ on Stack Overflow

Extract a value from json inside json string

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related