muyiwaoyeniyi

import React, { useState, useEffect, Fragment } from "react";

const Images = images => {
  const imageLinks = images.map(({ link }) => link);

  const [imageClickCount, setImageClickCount] = useState({});

  const buildImageClickCount = () => {
    const obj = {};
    images.forEach(({ link }) => {

ProGM

Arel Cheatsheet on Steroids

A (more) complete cheatsheet for Arel, including NamedFunction functions, raw SQL and window functions.

Tables

posts = Arel::Table.new(:posts)
posts = Post.arel_table # ActiveRecord

Table alias

WaKeMaTTa

Converting from Prototype to jQuery

Selecting DOM elements

Prototype’s selector returns DOM elements.

$("element_id");
// return: <div id="element_id"></div>

JoshCheek

# https://vimeo.com/192116528
require "graphics"

class Clock < Graphics::Simulation
  def initialize
    @radius         = 400
    @margin         = 20
    @increment_rate = 0.0009
    @num_lines      = 1600
    @line_width     = 2

brandondurham

/**
 * Using Operator Mono in Atom
 * 
 * 1. Open up Atom Preferences.
 * 2. Click the “Open Config Folder” button.
 * 3. In the new window’s tree view on the left you should see a file called “styles.less”. Open that up.
 * 4. Copy and paste the CSS below into that file. As long as you have Operator Mono SSm installed you should be golden!
 * 5. Tweak away.
 *
 * Theme from the screenshot (http://cdn.typography.com/assets/images/blog/operator_ide2.png):

olivierlacan

This guide assumes that you recently run brew upgrade postgresql and discovered to your dismay that you accidentally bumped from one major version to another: say 9.3.x to 9.4.x. Yes, that is a major version bump in PG land.

First let's check something.

brew info postgresql

The top of what gets printed as a result is the most important:

sebmarkbage

import { Component } from "React";

export var Enhance = ComposedComponent => class extends Component {
  constructor() {
    this.state = { data: null };
  }
  componentDidMount() {
    this.setState({ data: 'Hello' });
  }
  render() {

dineshrajpurohit

/**
 * 
 *  Dinesh
 * 
 *  RootedTreeTraversal
 *   - Preorder Traversal
 *   - Postorder Traversal
 *   - Inorder Traversal
 *   - Levelorder Traversal
 * 

quirkey

require 'rblineprof'

module Rblineprof
  module ConsoleHelpers
    include Rblineprof::Helpers

    def lineprof_block(options = {}, &block)
      profile = lineprof(rblineprof_profiler_regex(options[:lineprofiler])) do
        ret = yield
      end

schickling

require "active_record"

namespace :db do

  db_config       = YAML::load(File.open('config/database.yml'))
  db_config_admin = db_config.merge({'database' => 'postgres', 'schema_search_path' => 'public'})

  desc "Create the database"
  task :create do
    ActiveRecord::Base.establish_connection(db_config_admin)