alco

defmodule Returning do

  defmacro returning(val, do_block) do
    quote do
      val = unquote(val)
      case val, unquote(do_block)
      val
    end
  end
end

alco

λ brew reinstall postgres
==> Reinstalling postgresql
==> Downloading http://ftp.postgresql.org/pub/source/v9.3.5/postgresql-9.3.5.tar.bz2
Already downloaded: /Library/Caches/Homebrew/postgresql-9.3.5.tar.bz2
==> Patching
patching file contrib/uuid-ossp/uuid-ossp.c
==> ./configure --prefix=/usr/local/Cellar/postgresql/9.3.5_1 --datadir=/usr/local/Cellar/postgresql/9.3.5_1/share/postgresql --docdir=/usr/local/Cellar/postgresql/9.3
checking for POSIX signal interface... yes
checking for working memcmp... yes
checking for tclsh... /usr/bin/tclsh

alco

defmodule M do
  def test do
    cond do
      length([1,2,3]) == 0 -> false
      true
        "oops, I forgot the arrow"
    end
  end
end

alco

defmodule Compositions do
  # "Call" composition
  #
  #     f = Enum.map(& &1+1) ||| Enum.reverse
  #
  #     f.([1,2,3])  #=> [4, 3, 2]
  #
  #     g = f.() ||| List.to_tuple
  #
  #     g.([1,2,3])  #=> {4, 3, 2}

alco

def gen_module(file, rest_body) do
  # load things from the file here and assign them to variables
  Module.create(<name>, quote bind_quoted: [rest_body: rest_body, var1: var1, ...] do
    # now unquote() can be called here freely, it will be deferred until module compilation
    # therefore, you can copy-paste your previous in-line code without the file loading part
    def unquote(...)(...) do
      unquote(...)
    end
    
    ...

alco

  data_path = Path.expand(Path.join(__DIR__, "../../priv/address.json"))
  json = File.read!(data_path) |> JSEX.decode!
  Enum.each json, fn(el) ->
    {lang, data} = el
    Enum.each data, fn
      {"values", values} ->
        Enum.each values, fn({fun, list}) ->
          @get_fn String.to_atom("get_#{fun}")
          @count_fn String.to_atom("#{fun}_count")
          @lang String.to_atom(lang)

alco

(pprof) top10
Total: 2525 samples
     298  11.8%  11.8%      345  13.7% runtime.mapaccess1_fast64
     268  10.6%  22.4%     2124  84.1% main.FindLoops
     251   9.9%  32.4%      451  17.9% scanblock
     178   7.0%  39.4%      351  13.9% hash_insert
     131   5.2%  44.6%      158   6.3% sweepspan
     119   4.7%  49.3%      350  13.9% main.DFS
      96   3.8%  53.1%       98   3.9% flushptrbuf
      95   3.8%  56.9%       95   3.8% runtime.aeshash64

alco

# Numbers
0b0101011
1234 ; 0x1A ; 0xbeef ; 0763 ; 0o123
3.14 ; 5.0e21 ; 0.5e-12
100_000_000

# Atoms
:this ; :that
:'complex atom'
:... ; :<<>> ; :%{} ; :% ; :{}

alco

λ cat ~/.tmux.conf
# Don't use login shell in tmux
set -g default-command /bin/zsh

# Change default prefix to Ctrl-q
unbind C-b
set -g prefix C-q

# Pane switching with Alt-<arrow> keys
bind -n M-Left select-pane -L

alco

iex(1)> Mix.SCM.Git.checkout git: "https://github.com/alco/mix-elixir-template.git", dest: "templatio"
** (exit) exited in: :gen_server.call(Mix.ProjectStack, {:get_and_update, #Function<5.113990582/1 in Mix.ProjectStack.printable_app_name/0>}, 30000)
    ** (EXIT) no process