47 lines
969 B
Elixir
47 lines
969 B
Elixir
defmodule AOCHelpers do
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def lines(string) when is_binary(string) do
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String.split(string, "\n")
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end
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def words(str) when is_binary(str) do
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String.split(str)
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end
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def letters(str) when is_binary(str) do
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String.split(str, "", trim: true)
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end
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def integers(str) when is_binary(str) do
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str
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|> words()
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|> integers()
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end
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def integers(ws) when is_list(ws) do
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Enum.map(ws, &String.to_integer/1)
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end
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def lines_of_integers(input) do
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input
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|> lines()
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|> Enum.map(&integers/1)
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end
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@doc """
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Take a list of terms and a list of 1-arity functions and apply each function
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to the coresponding term in the list of terms.
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## Example
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iex> map_list([1, 2, 3], [&(&1 + 1), &(&1 * 100), &to_string/1])
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[2, 200, "3"]
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"""
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def map_list(args, funs) do
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Enum.zip_with(args, funs, fn arg, fun -> fun.(arg) end)
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end
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def id(x), do: x
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def always(x), do: fn -> x end
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def is?(x), do: &(&1 == x)
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end
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