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// The reducer function looks at each action that comes in
// and based on the type generates a new state based on the
// previous state and any additional data the action carried
const reducer = (state, action) => {
  switch (action.type) {
    case "COUNT_INCREMENT":
      return {
        ...state,
        count: state.count + 1
      };

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josephrexme

/**
 * Grid:
 * Using flexbox for the grid, inspired by Philip Walton:
 * http://philipwalton.github.io/solved-by-flexbox/demos/grids/
 * By default each .col within a .row will evenly take up
 * available width, and the height of each .col with take
 * up the height of the tallest .col in the same .row.
 *
 *   @example
 *   <div class="row">

josephrexme

const TrumpSort = (arr) => {
  let pushArray = [0];
  let wallHeight = pushArray[pushArray.length - 1];
  arr.forEach((v, i) => {
    if(v > wallHeight) pushArray.push(v);
  });
  pushArray.shift();
  return pushArray;
};

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/**
 * The first commented line is your dabblet’s title
 */
/*
.row{
}
.row::before, .row::after{
  content: ' ';
  display: table;
}

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#Model 

@user.should have(1).error_on(:username) # Checks whether there is an error in username 
@user.errors[:username].should include("can't be blank")  # check for the error message 

#Rendering
response.should render_template(:index)

#Redirecting 
response.should redirect_to(movies_path)

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select generate_series as num, 
       case when generate_series % 15 = 0
                then 'fizzbuzz' 
            when generate_series % 3 = 0 
                then 'fizz' 
            when generate_series % 5 = 0 
                then 'buzz' 
            else '' end 
       as fizzbuzz 
  from generate_series(1, 100);

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<?php
namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Category extends Model{
  public function subcategories(){
   return this->hasMany('App\Subcategory')
  }
}

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The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

josephrexme

Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

• Stores data elements based on an sequential, most commonly 0 based, index.
• Based on tuples from set theory.