Elixir 壓縮模塊

?zip?模塊讓你能夠在硬盤和內存中讀寫zip文件,也可以提取文件信息.

下列代碼計算了一個zip文件中的文件數量:

iex> :zip.foldl(fn _, _, _, acc -> acc + 1 end, 0, :binary.bin_to_list("file.zip"))
{:ok, 633}

?zlib?模塊用于以zlib格式壓縮文件,類似?gzip?命令.

iex> song = "
...> Mary had a little lamb,
...> His fleece was white as snow,
...> And everywhere that Mary went,
...> The lamb was sure to go."
iex> compressed = :zlib.compress(song)
iex> byte_size song
110
iex> byte_size compressed
99
iex> :zlib.uncompress(compressed)
"\nMary had a little lamb,\nHis fleece was white as snow,\nAnd everywhere that Mary went,\nThe lamb was sure to go."