Notes on binary pattern matching in Elixir

gistfile1.md

Elixir

Binary parsing in elixir is based on pattern matching.

<< "this is a binary literal in elixir" >>

So parsing binaries looks like:

iex(4)> << sign::size(1), exp::size(11), mantissa::size(52) >> = << 3.14159::float >>
<<64, 9, 33, 249, 240, 27, 134, 110>>

iex(5)> (1 + mantissa / :math.pow(2, 52)) * :math.pow(2, exp-1023)                   
3.14159