TomLisankie

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

stettix

Things I believe

This is a collection of the things I believe about software development. I have worked for years building backend and data processing systems, so read the below within that context.

Agree? Disagree? Feel free to let me know at @JanStette. See also my blog at www.janvsmachine.net.

Fundamentals

Keep it simple, stupid. You ain't gonna need it.

whistler

# copied from http://gbayer.com/development/moving-files-from-one-git-repository-to-another-preserving-history/
git clone <git repository A url> # clone source repository
cd <git repository A directory>
git remote rm origin # to make sure it doesn't affect the original repository
git filter-branch --subdirectory-filter <directory 1> -- --all # remove all files other than the ones needed
mkdir <directory 1> # move them into another directory where they will be stored in the destination repository (if needed)
mv * <directory 1>
git add .
git commit

jordanpoulton

Driver:
  -Write the code according to the navigator's specification
  -Listen intently to the navigators instructions
  -Ask questions wherever there is a lack of clarity
  -Offer alternative solutions if you disagree with the navigator
  -Where there is disagreement, defer to the navigator. If their idea fails, get to failure quickly and move on
  -Make sure code is clean
  -Own the computer / keyboard
  -Ignore larger issues and focus on the task at hand
  -Trust the navigator - ultimately the navigator has the final say in what is written

john2x

Clojure Destructuring Tutorial and Cheat Sheet

(Related blog post)

Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.

Vectors and Sequences

hofmannsven

MySQL

Getting started

• http://www.sqlteaching.com/
• https://www.codecademy.com/learn/learn-sql
• https://www.codecademy.com/catalog/language/sql

Related tutorials

• MySQL-CLI
• Analyzing Business Metrics

trongthanh

# source: http://st-on-it.blogspot.com/2010/01/how-to-move-folders-between-git.html
# First of all you need to have a clean clone of the source repository so we didn't screw the things up.

git clone git://server.com/my-repo1.git

# After that you need to do some preparations on the source repository, nuking all the entries except the folder you need to move. Use the following command

git filter-branch --subdirectory-filter your_dir -- -- all

# This will nuke all the other entries and their history, creating a clean git repository that contains only data and history from the directory you need. If you need to move several folders, you have to collect them in a single directory using the git mv command.