how to json.stringify() a string

Question

i have a complex object which is stored as a string in a text file

This is my data which i am reading from a text file

 [
 {
    name: "V",
    number: 20,
    coords: {
        "cn": { 
            points: [
                [23,32,32],
                [32,32,32]
            ], 
            B: "VC", 
            label: "ds"
        }
    }
}]

I want to convert this to a JSON string

Note:- I cant use eval function I have tried this JSON.stringify but i am getting this output:-

"   [\r\n     {\r\n        name: \"V\",\r\n        number: 20,\r\n        coords: {\r\n            \"cn\": { \r\n                points: [\r\n                    [23,32,32],\r\n                    [32,32,32]\r\n                ], \r\n                B: \"VC\", \r\n                label: \"ds\"\r\n            }\r\n        }\r\n    }]"

JSON.stringify(eval(string))

Pranav C Balan
– Pranav C Balan

2015-09-30 18:39:25 +00:00
Commented Sep 30, 2015 at 18:39 — Pranav C Balan
– Pranav C Balan, Commented Sep 30, 2015 at 18:39
I suggest to store the data as JSON in the first place.

Felix Kling
– Felix Kling

2015-09-30 18:45:27 +00:00
Commented Sep 30, 2015 at 18:45 — Felix Kling
– Felix Kling, Commented Sep 30, 2015 at 18:45
JSON.parse could be an option: JSON.parse vs. eval

WhiteHat
– WhiteHat

2015-09-30 19:00:27 +00:00
Commented Sep 30, 2015 at 19:00 — WhiteHat
– WhiteHat, Commented Sep 30, 2015 at 19:00

Pranav C Balan · Accepted Answer · 2015-09-30 18:41:17Z

2

You can use combination of eval() and JSON.stringify(). eval() will convert it into valid JavaScript object and now you can use JSON.stringify() to convert it into JSON string.

var str='[\
 {\
    name: "V",\
    number: 20,\
    coords: {\
        "cn": { \
            points: [\
                [23,32,32],\
                [32,32,32]\
            ], \
            B: "VC", \
            label: "ds"\
        }\
    }\
}]';

document.write(JSON.stringify(eval(str)));

answered Sep 30, 2015 at 18:41

Pranav C Balan

115k25 gold badges173 silver badges195 bronze badges

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

4 Comments

bangali babu Over a year ago

is there no other way except eval?

Pranav C Balan Over a year ago

@RanajitBanerjee : if there is any other way it will be harder than this, Better and easiest solution would be storing it as JSON format

zero_cool Over a year ago

Isn't eval a massive security risk? Anytime I see that being used someone comments about that being something to avoid entirely.

Pranav C Balan Over a year ago

@zero_cool JSON5 parser can use - json5.org

Iliya · Accepted Answer · 2019-06-21 10:00:30Z

i don't know the reason for this! converting object-form-string to JSON-string but it's easy in your case:

let object_form_string = `[
 {
    name: "V",
    number: 20,
    coords: {
        "cn": { 
            points: [
                [23,32,32],
                [32,32,32]
            ], 
            B: "VC", 
            label: "ds"
        }
    }
}]`

let json_form_string = object_form_string.replace(/(name|number|coords|points|B|label)(?=:)/g, "\"$&\"")

let obj_json = JSON.parse(`{"coordination": ${json_form_string}}`)
// add {} to change array to object
// add "coordination" (just an example) to access to data
// read/write data (optional of course)
let json = JSON.stringify(obj_json)
console.log(json)
console.log(`type of obj_json is: ${typeof obj_json}`)
console.log(json_form_string)
console.log(`name is: ${obj_json.coordination[0].name}`)
console.log(`number is: ${obj_json.coordination[0].number}`)

enjoy and don't use eval()

Collectives™ on Stack Overflow

how to json.stringify() a string

2 Answers 2

4 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

4 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related