Question

How to change a value of an object in an array in TypeScript

Answer 1

const arr = [
  { id: 1, language: 'javascript' },
  { id: 2, language: 'node.js' },
  { id: 3, language: 'typescript' },
  { id: 4, language: 'c++' },
];
 
const index = arr.findIndex(object => {
  	return object.id === 2;
}); 

if (index !== -1) {
  	arr[index].language = 'java';
}
 
console.log(arr);
   
   
   
   
/*
run:
   
[{
  "id": 1,
  "language": "javascript"
}, {
  "id": 2,
  "language": "java"
}, {
  "id": 3,
  "language": "typescript"
}, {
  "id": 4,
  "language": "c++"
}] 
   
*/

 

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