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26 lines
549 B
26 lines
549 B
4 years ago
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defmodule WordCount do
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@doc """
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Count the number of words in the sentence.
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Words are compared case-insensitively.
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"""
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@spec count(String.t()) :: map
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def count(sentence) do
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sentence
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|> String.split(~r/[ _ ]/)
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|> Enum.reduce(%{}, fn (word, acc) ->
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lower_word = word
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|> String.downcase
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|> String.replace(~r/[\$!&^%,:@]/, "")
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if String.length(lower_word) > 0 do
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count = Map.get(acc, lower_word, 0)
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Map.put(acc, lower_word, count + 1)
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else
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acc
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end
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end)
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end
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end
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