veelenga

#!/bin/sh
# Copyright (C) 2014 Vitaliy Elengaupt <[email protected]>

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of

veelenga

Vim notes

Created after reading Learning the vi and vim editors seventh editor. O`Reilly, 2008

• Basics
• Scrolling
• Moving around the text
• Searching
• Navigation
• Change Delete Copy patterns

veelenga

Git notes

Created after reading Pro Git - Scott Chacon, 2010

Note: add git at the beginning of each command below (except those that begins with $ or :)

• Help
• Config
• Staging/unstaging
• Diff
• History

veelenga

from optparse import OptionParser
from subprocess import call
from subprocess import check_output
import urllib
import re
import os
import sys
import shutil

def getUrlCode(url):

veelenga

################################################################################
p 10.itself   # 10
p "1".itself  # "1"
p :sym.itself # :sym
p true.itself # true

p nil.itself                                 # nil
p [1, 2].itself                              # [1, 2]
p ({"1" => "2"} of String => String).itself  # {"1" => "2"}
p /1/.itself                                 # /1/

veelenga

require "benchmark"

puts ">> Array#[] vs Array#[]?"
arr = Array.new(1000, 1)
Benchmark.ips do |x|
  x.report("Array#[]" ) { arr[500]  }
  x.report("Array#[]?") { arr[500]? }
end

puts ">> Interpolation vs Int32#to_s"

veelenga

Create db dump:

mysqldump -u user -p db_name > db_name.sql

Restore db dump:

mysql -u user -p db_name < db_name.sql

veelenga

                  $$$

                crystal

              crystal run

             crystal build

            crystal version

veelenga

# create dump of the database on remote server
$ mongodump --host remote_host --db database_name

# import into database on localhost
$ mongorestore --host localhost --dir dump/database_name/ --db database_name --drop

veelenga

class String
  def leftpad(len : Int, char = ' ')
    char, len = char.to_s, len - self.size

    raise ArgumentError.new if char.size != 1

    len > 0 ? (char * len + self) : self
  end
end