Command Line Interface (CLI)

Command	Description
./.bash_profile	this is where you go to set up alias and configure bash. usually found in your home directory.
man help	man formats and displays the on-line manual pages. If you specify sec- tion, man only looks in that section of the manual. name is normally the name of the manual page, which is typically the name of a command, function, or file. However, if name contains a slash (/) then man interprets it as a file specification, so that you can do man ./foo.5 or even man /cd/foo/bar.1.gz.
pwd	The pwd utility writes the absolute pathname of the current working directory to the standard output.
which	The which utility takes a list of command names and searches the path for each executable file that would be run had these commands actually been invoked.
brew	Homebrew is the easiest and most flexible way to install the UNIX tools Apple didn't include with OS X. more on brew commands
mkdir	make a directory
cp	copy file or directory
cat type	The most common use of cat is to read the contents of files, and cat is often the most convenient program for this purpose.
xargs	execute arguments
find dir-r	find files
grep select-string	find things inside files
apropos helpctr	find what man page is appropriate
env	look at your enivorment
echo	print some arguments
export set	export / set a new enviroment variable
chmod attrib	change file / directory permissions
chown icacls	change file / directory ownership
for files	run a command on a group of files
robocopy	command-line directory and/or file replication command. Robocopy functionally replaces Xcopy, with more options
sudo runas	become super / root user
less more	page through a file
rmdir	remove directory

Object Oriented Programming

Single responsibility

Code should be:

• Transparent The consequences of change should be obvious in the code that is changing and in distant code that relies upon it
• Reasonable The cost of any change should be proportional to the benefits the change achieves
• Usable Existing code should be usable in new and unexpected contexts
• Exemplary The code itself should encourage those who change it to perpetuate these qualities

A class should do the smallest possible useful thing.

why?

Applications that are easy to change consist of classes that are easy to reuse. Reusable classes are pluggable units of well-defined behavior that have few entanglements. An application that is easy to change is like a box of building blocks; you can select just the pieces you need and assemble them in unanticipated ways.
- Metz, Sandi Practical Object Oriented Design in Ruby (POODR). Crawfordsville: Addison-Wesley, 2013 . Print.

Classes

A class is a blueprint. one blueprint can be used to make many of the same objects for example a house or a bunch of houses, can be based off the same blue print. class are to objects what blueprints are to houses.

Inheritance

Inheritance is, at its core, a mechanism for automatic message delegation. It defines a forwarding path for not-understood messages. It creates relationships such that, if one object cannot respond to a received message, it delegates that message to another. You don’t have to write code to explicitly delegate the message, instead you define an inheritance relationship between two objects and the forwarding happens automatically.
- Metz, Sandi Practical Object Oriented Design in Ruby (POODR). Crawfordsville: Addison-Wesley, 2013 . Print.

Behavior & Messages

Behavior is what an object can do
Messages are how you get that object to perform that behavoir

Ruby

Syntax

Integer convience methods

String convience methods

Array convience methods

Hash convience methods

Enumerable

Javascript

Syntax

Integer convience methods

String convience methods

Array convience methods

Object convience methods

Markdown cheatsheet

Git & Github

Git is a version control system gitHub is a webbased application to manage git repositories and colaborate with others. read my post @ lee-egist.github.io

Git cheatsheet

HTML

HTML is really to large to cover in one page. Here is a link to a good resource: www.w3school.com

Cascading Style Sheets

@media

position

cross-browser compatabliity

Sinatra

Some kind of ruby gem?

don't know what i don't know

Rails

common commands

conventions

routing

Structured Query Language

D3

Data mapping tool

don't know what I don't know