Update every value of json array with dynamic key input (Javascript)

November 16, 2022

Input json

var foo = [
  { name: "John", age: "30", car: "yellow" },
  { name: "shayam", age: "13", car: "blue" },
  { name: "ram", age: "23", car: "red" },
];

function poo(keyName, value) {
   // Change all the value of JSON array according to key and value
}

poo("car", "orange");

poo("age","20");

expected output: 1

[
  { name: "John", age: 30, car: "orange" },
  { name: "shayam", age: 13, car: "orange" },
  { name: "ram", age: "23", car: "orange" }
]

expected output: 2

[
    { name: "John", age: "20", car: "orange" },
    { name: "shayam", age: "20", car: "orange" },
    { name: "ram", age: "20", car: "orange" }
];

>Solution :

The main key here is using dynamic object key with bracket notation, and use forEach and modify the target object without need to make a copy of it.

var foo = [   { name: "John", age: "30", car: "yellow" },   { name: "shayam", age: "13", car: "blue" },   { name: "ram", age: "23", car: "red" }, ];

const poo = (key, value) => {
  foo.forEach(i => i[key] = value)
  return foo
}

console.log(poo('car', 'orange'));
console.log(poo('age', '20'));