ryansobol

Originally published in June 2008

When hiring Ruby on Rails programmers, knowing the right questions to ask during an interview was a real challenge for me at first. In 30 minutes or less, it's difficult to get a solid read on a candidate's skill set without looking at code they've previously written. And in the corporate/enterprise world, I often don't have access to their previous work.

To ensure we hired competent ruby developers at my last job, I created a list of 15 ruby questions -- a ruby measuring stick if you will -- to select the cream of the crop that walked through our doors.

What to expect

Candidates will typically give you a range of responses based on their experience and personality. So it's up to you to decide the correctness of their answer.

gosukiwi

" ---------------------- USABILITY CONFIGURATION ----------------------
"  Basic and pretty much needed settings to provide a solid base for
"  source code editting

" don't make vim compatible with vi 
set nocompatible

" turn on syntax highlighting
syntax on
" and show line numbers

iBublik

class CreateIdentities < ActiveRecord::Migration
  def change
    create_table :identities do |t|
      t.string :provider
      t.string :uid
      t.integer :user_id

      t.timestamps null: false
    end

jarretmoses

RN < 0.50 - watchman watch-del-all && rm -rf $TMPDIR/react-* && rm -rf node_modules/ && npm cache clean && npm install && npm start -- --reset-cache
RN >= 0.50 -  watchman watch-del-all && rm -rf $TMPDIR/react-native-packager-cache-* && rm -rf $TMPDIR/metro-bundler-cache-* && rm -rf node_modules/ && npm cache clean && npm install && npm start -- --reset-cache
RN >= 0.63 - watchman watch-del-all && rm -rf node_modules && npm install && rm -rf /tmp/metro-* && npm run start --reset-cache

npm >= 5 - watchman watch-del-all && rm -rf $TMPDIR/react-* && rm -rf node_modules/ && npm cache verify && npm install && npm start -- --reset-cache

Windows - del %appdata%\Temp\react-native-* & cd android & gradlew clean & cd .. & del node_modules/ & npm cache clean --force & npm install & npm start -- --reset-cache

miguelmota

files:
  "/etc/nginx/conf.d/00_elastic_beanstalk_proxy.conf":
    mode: "000755"
    owner: root
    group: root
    content: |
      server {
        listen 80;
        gzip on;

ljharb

Array Iteration

https://gist.github.com/ljharb/58faf1cfcb4e6808f74aae4ef7944cff

While attempting to explain JavaScript's reduce method on arrays, conceptually, I came up with the following - hopefully it's helpful; happy to tweak it if anyone has suggestions.

Intro

JavaScript Arrays have lots of built in methods on their prototype. Some of them mutate - ie, they change the underlying array in-place. Luckily, most of them do not - they instead return an entirely distinct array. Since arrays are conceptually a contiguous list of items, it helps code clarity and maintainability a lot to be able to operate on them in a "functional" way. (I'll also insist on referring to an array as a "list" - although in some languages, List is a native data type, in JS and this post, I'm referring to the concept. Everywhere I use the word "list" you can assume I'm talking about a JS Array) This means, to perform a single operation on the list as a whole ("atomically"), and to return a new list - thus making it mu

mankind

http://stackoverflow.com/questions/22667401/postgres-json-data-type-rails-query
http://stackoverflow.com/questions/40702813/query-on-postgres-json-array-field-in-rails

#payload: [{"kind"=>"person"}]
Segment.where("payload @> ?", [{kind: "person"}].to_json)

#data: {"interest"=>["music", "movies", "programming"]}
Segment.where("data @> ?",  {"interest": ["music", "movies", "programming"]}.to_json)
Segment.where("data #>> '{interest, 1}' = 'movies' ")
Segment.where("jsonb_array_length(data->'interest') > 1")

oun

import { IntlProvider } from 'react-intl';

const language = 'en';
// Usually messages is declared in another file.
const messages = {
  greeting: 'Hello'
}
export const mesg = defineMessages({
  greeting: {
    id: 'greeting',

CodeMyUI

Glitch Effect

I got this image from here http://placeimg.com/

A Pen by takashi on CodePen.

License.

dmachat

Install Google Maps for iOS manually for react-native-maps

This is for my personal use, things might not be correctly explained here. For the official docs please check https://github.com/airbnb/react-native-maps

After installing react-native-maps from npm:

1. Drag this folder node_modules/react-native-maps/lib/ios/AirGoogleMaps/ into your project, and choose Create groups in the popup window.

2. In xcode, right click on Libraries -> Add files to [your project], and navigate to and add node_modules/react-native-maps/lib/ios/AirMaps.xcodeproj. Select Copy files is necessary and Create groups.