19 lines
597 B
Elixir
19 lines
597 B
Elixir
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defmodule BirdCount do
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def today([]), do: nil
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def today([head | _tail]), do: head
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def increment_day_count([]), do: [1]
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def increment_day_count([head | tail]), do: [head + 1 | tail]
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def has_day_without_birds?([]), do: false
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def has_day_without_birds?([0 | _tail]), do: true
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def has_day_without_birds?([_head | tail]), do: has_day_without_birds?(tail)
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def total([]), do: 0
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def total([head | tail]), do: head + total(tail)
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def busy_days([]), do: 0
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def busy_days([head | tail]) when head >= 5, do: 1 + busy_days(tail)
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def busy_days([_head | tail]), do: busy_days(tail)
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end
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