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.

victorcreed

<%= simple_form_for @job, html: { class: "form-horizontal" } do |f| %>
  <% new_and_edit_form_fields.each do |column| %>
    <%= f.input *column %>
  <% end %>
<% end %>

zbal

# Based on https://gist.github.com/fernandoaleman/5083680

# Start the old vagrant
$ vagrant init ubuntu_saucy
$ vagrant up
 
# You should see a message like:
#  [default] The guest additions on this VM do not match the install version of
#  VirtualBox! This may cause things such as forwarded ports, shared
#  folders, and more to not work properly. If any of those things fail on

nathanl

def factorial(n)
  (1..n).reduce(:*)
end

SECONDS_PER_STEP = 0.001

def total_seconds(n)
  factorial(n) * SECONDS_PER_STEP
end

MartinMuzatko

function commarize()
{
	// 1e6 = 1 Million, begin with number to word after 1e6.
	if (this >= 1e6)
	{
		var units = 
		[
			"Million",
			"Billion",
			"Trillion",

paulirish

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

SiZapPaaiGwat

upstream ws_server {
  server 127.0.0.1:8080;
}

server {
    listen       80;
    server_name  10.1.2.225;

    location / {
       proxy_pass   http://ws_server/;

JonCatmull

/**
 * @license
 * Copyright (c) 2019 Jonathan Catmull.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:

joeytwiddle

Do not use forEach with async-await

TLDR: Use for...of instead of forEach() in asynchronous code.

For legacy browsers, use for...i or [].reduce()

To execute the promises in parallel, use Promise.all([].map(...))

The problem

AhsanAyaz

import { Injectable } from '@angular/core';
import { BehaviorSubject, Observable } from 'rxjs';

export interface LoggerConfig {
  prefix?: string;
  color?: string;
  enabled: boolean;
}

@Injectable({