Update value property from JS "string"

Question

I got this value and I need to update the property application_name to myApp,

i've tried with JSON.parse but I got error "unexpected token ' "

this is a short example of the "string" which I got... Any idea?

"'{\"instance_id\":\"71658c8c-8fcf-546bb7b7cbdc\",\"application_name\":\"ht10\"}'\r"

remove the trailing \r and then parse.

coding_idiot
– coding_idiot

2015-08-12 19:17:42 +00:00
Commented Aug 12, 2015 at 19:17 — coding_idiot
– coding_idiot, Commented Aug 12, 2015 at 19:17

THE AMAZING · Accepted Answer · 2015-08-12 19:22:20Z

3

https://jsfiddle.net/rLgsb3p7/

{\"instance_id\":\"71658c8c-8fcf-546bb7b7cbdc\",\"application_name\":\"ht10\"}

Is a json string try:

var v = "'{\"instance_id\":\"71658c8c-8fcf-546bb7b7cbdc\",\"application_name\":\"ht10\"}'\r";
v = v.slice(1,v.length-2);
var x = JSON.parse(v);
console.log(x);

/r counts as a single character

edited Aug 12, 2015 at 19:22

answered Aug 12, 2015 at 19:16

THE AMAZING

1,6132 gold badges18 silver badges38 bronze badges

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

4 Comments

John Jerrby Over a year ago

Thanks a lot 1+ , last question assume I need to add(at the end) the quotes what is the opposite to v = v.slice(1,v.length-2);? and what do you mean by /r counts as a single character?

THE AMAZING Over a year ago

That is a bit beyond the scope of your initial query. just know \r is treated as a single character. [ H ] [ E ] [ L ] [ L ] [ O ] [ \r ]

THE AMAZING Over a year ago

if you need to append a string just use v += "appeneded text";

THE AMAZING Over a year ago

if you want to re-add your quotes use v = "'" + v + "'";

koga73 · Accepted Answer · 2015-08-12 19:15:05Z

2

Your string has an extra set of quotes which is causing JSON.parse to fail. This parses:

JSON.parse("{\"instance_id\":\"71658c8c-8fcf-546bb7b7cbdc\",\"application_name\":\"ht10\"}")

answered Aug 12, 2015 at 19:15

koga73

1,0211 gold badge10 silver badges17 bronze badges

1 Comment

John Jerrby Over a year ago

Thanks but I got it as parameter to function so what should i do in this case?

Collectives™ on Stack Overflow

Update value property from JS "string"

2 Answers 2

4 Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

4 Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related