Error in converting string to json object

Question

a = "{'sentiments': [['1485925200000', '0.0636363636364']]}"
// typeof(a) returns string

Trying to convert this string to json object in angular using JSON.parse(a). However, I am getting an error.

    SyntaxError: Unexpected token ' in JSON at position 1
at JSON.parse (<anonymous>)

Every instance of ', like so a = `{"sentiments": [["1485925200000", "0.0636363636364"]]} — E. Sundin
– E. Sundin, Commented Apr 5, 2017 at 18:54
you mean... convert string to json string? javascript object? how are you getting this... string? it isn't valid json and therefore cannot be parsed as json. — user400654
– user400654, Commented Apr 5, 2017 at 18:55

E. Sundin · Accepted Answer · 2017-04-05 18:57:56Z

3

Since my comment was poorly formatted I'm providing an answer.

Change your JSON format to the following valid one, replacing all ' with ".

a = `{"sentiments": [["1485925200000", "0.0636363636364"]]}`

answered Apr 5, 2017 at 18:57

E. Sundin

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Community · Accepted Answer · 2020-06-20 09:12:55Z

2

Since you have ' which are not supported by the JSON format, you can do something like:

a = "{'sentiments': [['1485925200000', '0.0636363636364']]}"
JSON.parse(a.replace(/'/g,'"'))

This uses regular expressions to find all instances of ' and replace them with ". So that your JSON can be parsed.

Edit

A more dangerous, yet acceptable approach could also be used in this example by using eval() since ' is considered a valid string declarator in JavaScript, thus you could do:

const myObject = eval(a)

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Apr 5, 2017 at 18:53

AP.

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4 Comments

user400654 Over a year ago

i mean... it's correct, until the string contains a string that contains single quotes. the... correct... way to fix this would be to fix the source, not run a regex on a string that should be json.

AP. Over a year ago

Addressed your use case @KevinB

Gaurav Lath Over a year ago

Worked like a charm :)

ibrahim mahrir Over a year ago

/\'/g could be just /'/g no need to escape it!

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