brownmike

# Problem Statement
# Create a class Calculator, which performs addition and subtraction of two numbers at a time.
class Calculator
  def add(a, b)
   a+b
  end

  def subtract(a, b)
   a-b
  end

eliotsykes

Open Source AngularJS Rails Apps

Expect some false positives here, but hopefully most of these are open source Rails apps that use (or once used) AngularJS.

If you'd like to help update the list, please comment below with any of these apps you discover do not use AngularJS and include my username (@eliotsykes) in your message.

Confirmed using AngularJS

• https://github.com/openfoodfoundation/openfoodnetwork

stevenyap

These are steps to setup a new project in ROR.
You must configure and install your Gems individually instead of copying the Gemfile from a previous project.

Refer to Heroku setup if you want to push your project to Heroku.

Setup directory

# Create directory in ~/workspace
mkdir ./testproject
cd ./testproject

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

thbar

njonsson

Someone recently asked the following question in the discussion forum of the Rubyists LinkedIn group: What separates a junior Rails developer from a senior one?

My response follows. Join us at http://www.linkedin.com/groups?gid=120725 to weigh in on this and other topics of interest to Rubyists. As of today there are almost 1,200 members, including numerous movers and shakers in the Ruby and Rails communities.

“Distinguishing between junior and senior people in the Rails world is not so different from making the distinction in other web development environments.

“Junior Rails people have not dealt with scaling issues to the degree that senior people have. Getting a public-facing Rails application to perform under significant stress is more challenging than doing the same with other building materials such as PHP. Senior people know how to performance-test Rails applications, where to look for bottlenecks, and how to eliminate them one after another until performance is acceptable in real conditions. The Ra

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.

JoshCheek

#!/usr/bin/env ruby
require 'io/console'

class Grid
  def self.from_str(str, color:)
    rows = str.lines.map do |line|
      line.chomp.chars.map do |c|
        color if c != " ".freeze
      end
    end

olee

// create a bookmark and use this code as the URL, you can now toggle the css on/off
// thanks+credit: https://dev.to/gajus/my-favorite-css-hack-32g3
javascript: (function() {
	var styleEl = document.getElementById('css-layout-hack');
	if (styleEl) {
		styleEl.remove();
		return;
	}
	styleEl = document.createElement('style');
	styleEl.id = 'css-layout-hack';

nuxlli

Sublime Text 2 - Useful Shortcuts

Tested in Mac OS X: super == command

Open/Goto

---

• super+t: go to file
• super+ctrl+p: go to project
• super+r: go to methods