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$ !!                     # Repeat last command
$ !x                     # Repeat last command that started with x
$ !?x                    # Repeat last command that has the substring x
$ !10                    # Repeat 10th command in the history file
$ !-10                   # Repeat 10th from last command in the history file
$ !!*                    # Fetch parameters from last command
$ !!^                    # Fetch first parameter from last command
$ !!$                    # Fetch last parameter from last command
$ !!3                    # Fetch third parameter from last command

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Ruby Syntax Basics

General

• Line endings separate statements. Semicolons optional.
• Line comments begin with #
• Block comments enclosed by =begin and =end

Operators

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Introduction

git commit - Commit under HEAD and make HEAD point to the new commit

git branch <branchname> - Point to HEAD
git branch <branchname> <commit> - Point to
If <branchname> already points somewhere, use -f to force moving the pointer

git checkout <branchname> - Attach HEAD to
When HEAD is attached to , they move together. In this case we call `` the active branch.

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# GIT WORKFLOW

# Initialize:

  git init

# Check Out:

  git clone username@host:/path/to/repository

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A crisis is when you can't say "Let's just forget the whole thing."
-- Ferguson
%
A professional programmer is an amateur who never quit.
%
A real person has two reasons for doing anything... a good reason and the real reason.
%
A student who changes the course of history is probably taking an exam.
%
Advertising may be described as the science of arresting the human intelligence long enough to get money from it.

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Berlin;Hamburg;1:35
Bialystok;Vilnius;7:30
Munich;Prague;6:05
Berlin;Munich;5:45
Frankfurt;Munich;3:10
Berlin;Prague;4:35
Amsterdam;Brussels;1:53
Brussels;Cologne;1:47
Amsterdam;Cologne;2:38
Amsterdam;Berlin;6:10

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AUTHOR,LANGUAGE,GENRE,BOOKS
William Shakespeare,English,Plays,42
Agatha Christie,English,Mystery,85
Barbara Cartland,English,Romance,723
Danielle Steel,English,Romance,179
Harold Robbins,English,Adventure,23
Georges Simenon,French,Mystery,570
Enid Blyton,English,Children's Literature,800
Sidney Sheldon,English,Thriller,21
J. K. Rowling,English,Children's Literature,15

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#TabsToolbar #tabbrowser-tabs .tabbrowser-tab:not([pinned]) .tab-close-button {
  visibility: hidden !important;
  display: block !important;
  opacity: 0 !important;
  -moz-margin-end: -16px !important;
}

#TabsToolbar #tabbrowser-tabs .tabbrowser-tab[pinned] .tab-close-button {
  visibility: hidden !important;
  display: block !important;