thegitfather

Vanilla JavaScript Quick Reference / Cheatsheet

Just migrated it from Codepen.io to markdown. Credit goes to David Conner.

Working with DOM	Working with JS	Working With Functions
Accessing Dom Elements	Add/Remove Array Item	Add Default Arguments to Function
Grab Children/Parent Node(s)	Add/Remove Object Properties	Throttle/Debounce Functions
Create DOM Elements	Conditionals

vasanthk

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?

bishboria

These links no longer work. Springer have pulled the free plug.

Graduate texts in mathematics

duplicates = multiple editions

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

DrummerHead

Front-end, programming, design

Twitter feed

@jeresig

@paul_irish

@vpieters

akras14

Git Cheat Sheet

Commands

Getting Started

git init

or

eliotsykes

require 'rails_helper'

RSpec.describe TodosController, :type => :controller do

  describe "GET #index" do
  #describe "POST #create" do
  #describe "GET #show" do
  #describe "PATCH #update" do (or PUT #update)
  #describe "DELETE #destroy" do
  #describe "GET #new" do

andycandrea

A list of resources that aspiring Rails developers can use to learn Rails and other relevant technologies. This list includes some resources that I see recommended all over the web--not all of which I like--as well as some hidden gems that I've found valuable. This list is intended to supplement my blog post here.

Ruby

• Codecademy
  • One of the more well-known sites to offer interactive programming tutorials, Codecademy is probably best utilized by those who are pretty new to programming, though the Ruby tutorial is good for teaching Ruby syntax and eventually gets into some less trivial material.
• Try Ruby
• Pretty similar to Codecademy. Once again, it's beginner-friendly, though, as someone who knew about object-oriented programming beforehand, I found it somewhat annoying to use, as there's no page with links to the individual exercises (at le

wkjagt

#How I built an audio book reader for my nearly blind grandfather

Tweet this - Follow me

Last year, when visiting my family back home in Holland, I also stopped by my grand-parents. My grand-father, now 93 years old, had always been a very active man. However, during the presceding couple of months, he'd gone almost completely blind and now spent his days sitting in a chair. Trying to think of something for him to do, I suggested he try out audio books. After finally convincing him -- he said audio books were for sad old people -- that listening to a well performed recording is actually a wonderful experience, I realized the problem of this idea.

####The problem with audio devices and the newly blind. After my first impulse to jump up and go buy him an

tsiege

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!






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loganhasson

Using the Sieve of Eratosthenes to Find Prime Numbers in Ruby

The Sieve of Eratosthenes is a super efficient way to determine whether or not numbers are prime. Essentially, it takes a max number, and via the process of elimination, gives you an array that contains every prime number up to that max number.

The very short explanation is this:

1. Create an array from 0..max
2. Starting at 2, delete every multiple of 2 from the array.
3. Then, go back to the beginning, and delete every multiple of 3.
4. Repeat this starting from the next available number at the beginning of the array.