#10 most askedVery commonMediumReferences & copying

Implement deepClone

🏢 Asked in real interviews

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Write deepClone(value) that copies nested objects and arrays, so changing the copy never affects the original. Plain objects, arrays and primitives are enough.

🧪 Practice

Write your solution, then press Run tests. Explain your approach out loud as you go.

function deepClone(value) {
  // your code here
}

Output appears here. Press Run or Ctrl/⌘ + Enter.

Try it first. Struggling for a few minutes is how it sticks.