retgoat

2. Given the file with random chars, draw a histogram of chars count.
For example for file with content

===
123456789012345678909999991234569999
===

Output should be the following:

1 ***

retgoat

# For more elaborate use cases, see the IndirectUsesTracker instead:
# https://gist.github.com/christhekeele/fc4e058ee7d117016b9b041b83c6546a

###
# A way to know, at runtime, what modules a module has used at compile time.
# In this case, you include `UsesTracker` into a module. When that module gets
# used in some other module, it registers itself with the other module.
##
defmodule UsesTracker do
  

retgoat

# For simpler use cases, see the UsesTracker instead:
# https://gist.github.com/christhekeele/e858881d0ca2053295c6e10d8692e6ea


###
# A way to know, at runtime, what modules a module has used at compile time.
# In this case, you include `IndirectUsesTracker` into a module. When that module gets
# used in some other module, it makes that module registerable under a namespace of your choosing.
# When the registerable module is used into a third module, that third module will know at runtime which
# registerables were `use`d in it at compile time, via a function titled after the namespace.

retgoat

def get_specific_version(id, version, scope) do
  datetime = Timex.parse!(version, "%FT%T.%fZ", :strftime)
             |> Timex.shift(seconds: -1)
             |> Timex.to_datetime
  q = """
  SELECT #{version_fields()} FROM #{table()}
  WHERE id = $1::integer AND sys_period @> $2::timestamptz AND scope @> $3::ltree
  UNION ALL
  SELECT #{version_fields()} from #{history_table()}
  WHERE id = $1::integer AND sys_period @> $2::timestamptz AND scope @> $3::ltree;

retgoat

Pry Cheat Sheet

• Youtube Tutorial 2013

Command Line

• pry -r ./config/app_init_file.rb - load your app into a pry session (look at the file loaded by config.ru)
• pry -r ./config/environment.rb - load your rails into a pry session

Debugger

retgoat

Flat an array without using Array#flatten method

Ruby

ary = [[1, 2, [3], []], 4]

Recursion

ary.flat_map{|element| element.kind_of?(Array) ? element.flat_map{|i| i} : element }

retgoat

/*
Copyright (c) 2015 Paul Jolly <paul@myitcv.org.uk)

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

retgoat

skip_filter *_process_action_callbacks.map(&:filter), :only => [:action_goes_here]

retgoat

GET http://localhost:3000/fb/fb_code
RESPONSE
{"redirect_url":"https://www.facebook.com/dialog/oauth?client_id=893637180663238\u0026redirect_uri=http%3A%2F%2Flocalhost%3A3000%2Ffb%2Fcallback"}

----
redirect to https://www.facebook.com/dialog/oauth?client_id=893637180663238\u0026redirect_uri=http%3A%2F%2Flocalhost%3A3000%2Ffb%2Fcallback
redirect to callback_url
GET http://localhost:3000/fb/callback?code=FB_AUTH_CODE
RESPONSE
{"access_token":"FB_ACCESS_TOKEN"}

retgoat

# backported from rails 4 to use inside rails 3
# if you're using rails 4, you do not actually need this.
module ActiveSupport
  class Logger < ::Logger
    # extend ActiveSupport::TaggedLogging
    # Broadcasts logs to multiple loggers. Returns a module to be
    # `extended`'ed into other logger instances.
    def self.broadcast(logger)
      Module.new do
        define_method(:add) do |*args, &block|