Syntax error Convert the number or boolean type JSON object from string type to its original in JavaScript

Convert the number or boolean type JSON object from string type to its original in JavaScript

Suppose we have a short JSON object like this −

const obj = {"name":"sam","age":"24","isMarried":"false"};

Here, some of the Number and Boolean values, by mistake, have been coerced to String.

Like the age property which was a Number and isMarried property which was a boolean. Our job is to write a function that takes in one such object and correctly changes these incorrect data types with the correct ones.

Example

The code for this will be −

const obj = {
   "name":"sam",
   "age":"24",
   "isMarried":"false"
};
const convertToOriginal = (obj = {}) => {
   const keys = Object.keys(obj);
   for(let i = 0; i < keys.length; i++){
      const key = keys[i];
      const num = parseInt(obj[key], 10);
      const val = obj[key];
      if(num && String(num) === val){
         obj[key] = num;
      }
      else if(val === 'true' || val === 'false'){
         obj[key] = Boolean(val);
      };
   };
};
convertToOriginal(obj);
console.log(obj);

Output

And the output in the console will be −

{ name: 'sam', age: 24, isMarried: true }
Updated on: 2020-11-23T10:01:48+05:30

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