Sha256: bedb1179eeb1008672dbd02d7ab4de1de93ebb9c1c67d6a9b8f5b6dd40dc65de
Contents?: true
Size: 661 Bytes
Versions: 327
Compression:
Stored size: 661 Bytes
Contents
defmodule CryptoSquare do
@doc """
Encode string square methods
## Examples
iex> CryptoSquare.encode("abcd")
"ac bd"
"""
@spec encode(String.t) :: String.t
def encode(""), do: ""
def encode(str) do
normalized = normalize_string(str)
section_length = normalized |> byte_size |> :math.sqrt |> Float.ceil |> trunc
normalized
|> String.graphemes
|> Enum.chunk(section_length, section_length, List.duplicate("", section_length))
|> List.zip
|> Enum.map(&Tuple.to_list/1)
|> Enum.join(" ")
end
defp normalize_string(str) do
str
|> String.downcase
|> String.replace(~r/[^a-z0-9]/, "")
end
end
Version data entries
327 entries across 327 versions & 1 rubygems