remove quotes from object with square brackets

Question

I have these 2 Objects with the double quotes around start and end value

0: {name: "0", type: "line", start: "[20.6000,37.4000]", end: "[28.2000,30.8000]", vel: 0.3, …}
1: {name: "1", type: "line", start: "[53.3000,25.0000]", end: "[52.7000,35.3000]", vel: 0.3, …}  

and I want to have this

0: {name:"0", type:"line", start: [20.600,37.4000], end: [28.2000,30.8000],...}

how can I remove the double quotes so start and end values become Number?

I tried:

0["start"].replace(/^"(.*)"$/, '$1'); => typeof String
0["start"].slice(1, -1); => typeof String
Number(0["start"]) => this return NaN

I am doing a Ajax post call to my NodeJs Server, where the JSON gets converted to a YAML File and then sent back.

this is the result:

segments: 
- 
  name: "0"
  type: "line"
  start: "[20.6000,37.4000]"
  end: "[28.2000,30.8000]"
  vel: 0.3
  ang: 0

a valid yaml but I need the start and end Value as Number

Answer 1

Solution using JSON.parse , Array#map and spread operator . Does not mutate original data set.

 const data=[{name:"0",type:"line",start:"[20.6000,37.4000]",end:"[28.2000,30.8000]",vel:.3},{name:"1",type:"line",start:"[53.3000,25.0000]",end:"[52.7000,35.3000]",vel:.3}]; const res = data.map(({start, end,...rest})=>{ start = JSON.parse(start), end = JSON.parse(end); return {...rest, start, end}; }) console.log(res); 

Regex solution:

 const data=[{name:"0",type:"line",start:"[20.6000,37.4000]",end:"[28.2000,30.8000]",vel:.3},{name:"1",type:"line",start:"[53.3000,25.0000]",end:"[52.7000,35.3000]",vel:.3}]; function stringToArray(data){ return data.match(/\\d(\\.?[0-9])*/g).map(Number); } const res = data.map(({start, end,...rest})=>{ start = stringToArray(start); end = stringToArray(end); return {...rest, start, end}; }) console.log(res); 

Answer 2

You can try using JSON.parse

loop over your file and use

JSON.parse(x['start']) // JSON.parse(0['start'])

Answer 3

Just loop - note you will lose the zeroes at the end of the decimals when converting:

 var arr = [{name: "0", type: "line", start: "[20.6000,37.4000]", end: "[28.2000,30.8000]", vel: 0.3}, {name: "1", type: "line", start: "[53.3000,25.0000]", end: "[52.7000,35.3000]", vel: 0.3}] arr.forEach(function(entry) { entry.start = JSON.parse(entry.start); entry.end = JSON.parse(entry.end); }) console.log(arr)