Sha256: 315ef7116ad6a49e545a6d8cd70e5c7db4848261339e02c7595573359cf6b2de
Contents?: true
Size: 638 Bytes
Versions: 69
Compression:
Stored size: 638 Bytes
Contents
defmodule RunLengthEncoder do
@spec encode(String.t()) :: String.t()
def encode(string) do
Regex.scan(~r/([a-zA-Z\s])\1*/, string)
|> Enum.map_join(fn [run, c] ->
times = String.length(run)
number =
if times == 1 do
""
else
times
end
"#{number}#{c}"
end)
end
@spec decode(String.t()) :: String.t()
def decode(string) do
Regex.scan(~r/(\d*)(.)/, string)
|> Enum.map_join(fn [_, n, c] ->
times =
if n == "" do
1
else
String.to_integer(n)
end
String.duplicate(c, times)
end)
end
end
Version data entries
69 entries across 69 versions & 1 rubygems