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    }]"

Answer 1

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)));

Answer 2

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()

Answer 3

If it is already stored as a string, is it not in JSON already? You shouldn't need to convert it anymore. That's why the \\r and \\n are appearing. You should not need to convert it anymore.