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Git Cheat Sheet

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Overview

Centralized version control - SVN,Perforce Localized version control - Git,Mercurial

Git creates only 1 .git folder, while svn creates lots of svn folder.

Commands

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We have already seen git commands here, hence won't be repeating it.

Change to your project root folder and do this initially to get your repo set up

# Link remote repo with you local repo.
git remote add alias <Your repo URL>

# Example - Note origin instead of alias
git remote add origin <Your repo URL>

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#ELK Stack

The ELK stack contains Elasticsearch, Logstash, and Kibana:

• Elasticsearch for deep search and data analytics
• Logstash for centralized logging, log enrichment and parsing
• Kibana for powerful and beautiful data visualizations

The architecture ELK:

send data storage data reads data 

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Erlang for beginners

• Why erlang?
• Why Use Erlang?
• When would you choose Erlang?
• Erlang: For an absolute beginner
• An Erlang OTP tutorial for beginners
• A Beginners Guide to Erlang
• What is the best way to learn Erlang?
• The Joy of Erlang; Or, How To Ride A Toruk

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first ruby tutrial

Environment Setup

• install XCode: search 'xcode' in app store and install
• install 'command line tools': after XCode installed in XCode, install from it's preference pane
• install home brew: open up terminal, and type ruby -e "$(curl -fsSL https://raw.github.com/mxcl/homebrew/go)"
• install rbenv: open up terminal, and type brew install rbenv
• as said, echo 'eval "$(rbenv init -)"' >> .bashrc', then close terminal window and open again
• install ruby-build: in the terminal, and type brew install ruby-build

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Go Tutorials

This gist documents steps taken to troubleshoot or fix issues raised when following the [WomenWhoGo Tutorials] (https://github.com/womenwhogonyc/Go-Tutorial)

Installing Go

Install Go:

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ActiveRecord

Let's create a MovieDB app to learn AR :)

The Tables

The Models

$ rails generate model genre name:string

$ rails g model movie name:string release_date:date revenue:decimal genre_id:integer

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#String Manipulation This is a free revision guide for GCSE Computer Science created by Tito Sarrionandia for http://LearnCompSci.uk

##Introduction As you will recall from the Selecting & Using Datatypes section, a String is a datatype. It is made up of a series of individual characters. They are used to represent textual data. For example, if you send a message to a friend online, the message is probably stored as a string in the messaging program.

We often use double quotes to represent a string, we will stick to that convention for this guide, like this:-

"Hello, World!"

Everything inside the quotes is part of the string.

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Data Structures

1. Lists

1. list.append(x), list[len(list):] = [x]
2. list.extend(L), list[len(list):] = L
3. list.insert(i, x)
4. list.remove(x)
5. list.pop(i), i is optional, if i is not specified, removes last one
6. list.index(x)
7. list.count(x)

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Errors and Exceptions

1. Handle Exceptions

• try ... except

while True:
	try:
		x = int(raw_input("Please enter a number: "))
		break