Question

How to add a range of elements of an array to another array at a specific position in TypeScript

Answer 1

let source: number[] = [10, 20, 30, 40, 50, 60, 70];
let target: number[] = [1, 2, 3, 4];

// Insert elements from index 2 to 5 (30, 40, 50) into `target` at position 1
let rangeToInsert: number[] = source.slice(2, 5);
target.splice(1, 0, ...rangeToInsert);

console.log(target); 
 
 
 
/*
run:
 
[1, 30, 40, 50, 2, 3, 4] 
 
*/
  

 

70+ SQL courses for beginners and professionals