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Discussion on: No duplicates challenge in Elm

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1hko profile image
1hko • Edited on

You cases check for 1) an empty list, 2) a list with exactly two elements, and 3) a list with 2 elements and a tail. You forgot to check for the singleton list (a list with exactly one element) which is what the compiler is warning you about. Note, checking for a list with exactly two elements is not effective for this particular program.

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antonrich profile image
Anton Author

I'm taking a note of "checking for a list with exactly two elements is not effective for this particular program."