← Practice
Arrays·medium 18 min 75 XP

Array Difference

Return the values in the first array that do not appear in the second.

Examples

  • difference([1,2,3], [2,3]) → [1]

Constraints

  • Keep the required function name so the tests can find it
  • Return a value instead of only logging it
  • Do not mutate inputs unless the challenge asks you to
Array Difference · editor

Code runs in an isolated Web Worker with a 3-second timeout — no DOM access, and it can never hang the page.