Run results for: Insert value at certain index in array

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36

Browser: Chrome 103

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
For-loop approach test	34778.5 Ops/sec
Native functions test	36504.1 Ops/sec

Tests:

For-loop approach test
// Params: const arr = [1, 2, 3, 4]; const index = 3; const newItem = 5; // Steps: // 1. Create new array from the original one at given index let copy = []; for (let i = 0; i < index; i++) { copy[copy.length] = arr[i]; } // 2. Add new item to the copy copy[index] = newItem; // 3. Get the rest of the original array let rest = []; for (let i = index; i < arr.length; i++) { rest[rest.length] = arr[i]; } // 4. Merge the two arrays for (let i = 0; i < rest.length; i++) { copy[copy.length] = rest[i]; } // 5. Print the merged array console.log(copy);
Native functions test
// Params: const arr = [1, 2, 3, 4]; const index = 3; const newItem = 5; // Steps: // 1. Create new array from the original one at given index let start = arr.slice(0, index); // 2. Add new item to the copy start.push(newItem); // 3. Get the rest of the original array let end = arr.slice(index); // 4. Print the merged array console.log(start.concat(end));