Rosetta Code

I before E except after C

Check sample words against the classic “i before e except after c” spelling rule.

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Sourcerosettacode/popular/i_before_e_except_after_c.vibe
def obeys_rule?(word: string) -> bool
  lower = word.downcase

  if lower.index("cie") != nil
    return false
  end

  ei_index = lower.index("ei")
  if ei_index == nil
    return true
  end

  if ei_index > 0 && lower.chars.fetch(ei_index - 1) == "c"
    return true
  end

  false
end

def run -> { ancient: bool, believe: bool, ceiling: bool, science: bool, weird: bool }
  {
    believe: obeys_rule?("believe"),
    ceiling: obeys_rule?("ceiling"),
    science: obeys_rule?("science"),
    weird: obeys_rule?("weird"),
    ancient: obeys_rule?("ancient")
  }
end

Output

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