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Deep Freeze

EasyP3Coding

Implement deepFreeze(value), which freezes an object and everything reachable through its properties, then returns the same object.

  • Freeze nested objects and arrays at any depth (own properties, string and symbol keyed).
  • Return value itself, not a copy.
  • Primitives are returned as they are.
  • The structure may contain cycles (an object that refers back to an ancestor); the function must terminate.
  • Do not freeze anything that is not reached through own properties; prototypes are left alone.

Example 1

Input
const o = deepFreeze({ a: { b: 1 } }); Object.isFrozen(o.a);
Output
true

Constraints

  • Total number of objects <= 10^4
  • Values are plain objects and arrays, with possible cycles.

Hints

Run checks the 3 visible tests, Submit all 8.