JS Built-ins
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ArrayArray.prototype.toSortedintermediate

toSorted Returns a New Reference

📖 Usage Example
const arr = [3, 1, 2]
arr.sort((a,b)=>a-b)  // mutates arr → [1, 2, 3]
const s = [3,1,2].toSorted((a,b)=>a-b)  // safe copy

Choose toSorted() over sort() when working in functional or immutable patterns.

Array.prototype.toSorted — New Array

Unlike sort, which sorts in place and returns the same reference, toSorted always returns a new array — the result is never === the input.

Implement toSortedReturnsNew which returns true if arr.toSorted() is a different reference than arr.

💡 Hints (2)
  • • Use strict inequality (!==) to compare array references
  • • toSorted always allocates a new array, even if elements are identical