toraritte

# original code
gcd=->(_){_.sort_by(&:-@).inject{|p,q|q.nonzero?&&gcd[[q,p-q]]||--p}}
$/=' ';gets;puts gcd[[$_,gets].map &(method :Integer)]


# original code modified (puts&gets removed, made example explicit, etc.)
# === 1st line ===
gcd=->(_){_.sort_by(&:-@).inject{|p,q|q.nonzero?&&gcd[[q,p-q]]||--p}}
# -@      unary minus—returns the receiver’s value, negated.
# Numeric.instance_methods(false).grep /@/    #=> [:+@, :-@]

toraritte

-module(count_chars).
-export([count_chars/1, count_characters/1]).


count_characters(Str) ->
    count_characters(Str, #{}).

%% maps module functions cannot be used as guards (release 17)
%% or you'll get "illegal guard expression" error
count_characters([H|T], X) ->

toraritte

=== CALL TRACE OF net_kernel:connect\1

% otp/lib/kernel/src/net_kernel.erl
connect(node_name@machine) -> do_connect(node_name@machine, normal, false). ->
  %          Node,              Type,   WaitForBarred
  do_connect(node_name@machine, normal, false           ) -> %% Type = normal | hidden
    case catch ets:lookup(sys_dist, Node) of
        % [{connection, ...}] if node is in sys_dist
        % []                  if not
	{'EXIT', _} ->

toraritte

% The cause of the second output is (where the 
% receive block is commented out) is that because
% the process does not expect any messages and it
% ends naturally.
%
% On the other hand, the version with receive
% expects messages (spits out any message that
% arrives) and it keeps on running until it is
% told to stop.

toraritte

% because 256 needs 9 bits to represent it
% although it is 2^8
62> <<256>>.
<<0>>
% because the segments of an Erlang binary
% has to be divisible by 8. Hence
% 1000 0000, 0
57> <<256:9>>.
<<128,0:1>>

toraritte

###################################################
### Solution to `invalid quoted expression`
### short version: use `Macro.escape/1`
###
### https://elixirforum.com/t/cant-seem-to-unquote-a-map/4009
###################################################

    ########################################
    ### (1) do smth with map, tuple etc.
    ###     but only in the body of the

toraritte

defmodule A do   
  def vmi, do: IO.puts(27)
  def balabab, do: IO.puts(7)
  def lofa do
    f = [&vmi/0, &balabab/0]
    Enum.each(f, &(&1.()))
  end
end

toraritte

# Partial EEx template application
#
# As OvermindDL1 and Jose' pointed out, this doesn't cover for
# templates like "<%= a + b %>" and why not just simply collect
# the assigns, and apply them when we have them all.
# https://groups.google.com/forum/#!topic/elixir-lang-core/pYSfP3x7vwc

# I still think that there would be a use case for partial application
# and it was a nice mind exercise:)

toraritte

rsync -avz --delete --progress \
      -e "ssh -i ~/.ssh/my_private_key" \ # or just `-e ssh` (see below)
      /SOURCE_PATH username@1.2.3.4:/DESTINATION_PATH
      
# Breaking down:

# -a, --archive               archive mode; equals -rlptgoD (no -H,-A,-X)
#
#     -r, --recursive             recurse into directories
#     -l, --links                 copy symlinks as symlinks

toraritte

////////////////////////////////////////////
// NEO4J GRAPH SETUP
//
// http://console.neo4j.org/?id=jkwe2h
////////////////////////////////////////////

CREATE
  (kilgore:Person {name: 'Kilgore'}),
  (logan:Person   {name: 'Logan'}),
  (u1:Unit {name: 'Apt 7A'}),