JS Practice — Built-in Objects

toSpliced Returns a New Array

📖 Usage Example

const arr = [1, 2, 3]
arr.splice(0, 1)       // mutates arr → [2, 3]
const r = [1,2,3].toSpliced(0, 1)  // safe → [2, 3]

Prefer toSpliced() over splice() in functional code to avoid unintended mutation.

Array.prototype.toSpliced — New Reference

While splice mutates and returns removed elements, toSpliced always returns a new array. The result is never the same reference as the input.

Implement toSplicedReturnsNew which returns true if arr.toSpliced(0, 0) is a different reference than arr.

💡 Hints (2)