Isogram

Challenge Overview

Determine if a word or phrase is an isogram.

Visit the isogram exercise on Exercism to read the full instructions and download the exercise files.

Community Solutions

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The following are the top 3 community solutions by stars:

Solution 1 by @Thewessen (⭐ 0) — View on Exercism
Solution 2 by @unchartedworks (⭐ 0) — View on Exercism
Solution 3 by @mbraak (⭐ 0) — View on Exercism

Source: Exercism reasonml/isogram

💡 View Solution

let is_isogram = (word) => word
  |> String.lowercase_ascii
  |> Js.String.replaceByRe([%re "/[^a-z]/g"], "")
  |> Js.Re.test_([%re "/([a-z]).*\1/g"])
  |> (!)