Question

How to convert array of objects to array of values in TypeScript

Answer 1

const objArr = [
  { id: 1, language: 'javascript' },
  { id: 2, language: 'node.js' },
  { id: 3, language: 'typescript' },
  { id: 4, language: 'c++' },
];
 
const arr = objArr.map(object => object.language);
 
console.log(arr); 
 
   
   
   
/*
run:
   
["javascript", "node.js", "typescript", "c++"]
   
*/

 

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Answer 2

const objArr = [
  { id: 1, language: 'javascript', room: 'A'},
  { id: 2, language: 'node.js', room: 'B' },
  { id: 3, language: 'typescript', room: 'C' },
  { id: 4, language: 'c++', room: 'D' },
];
 
const arr: Array<string> = [];
 
objArr.forEach(object => {
  arr.push(object.language);
  arr.push(object.room);
});
 
console.log(arr); 
 
   
   
   
/*
run:
   
["javascript", "A", "node.js", "B", "typescript", "C", "c++", "D"] 
   
*/

 

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