Nils Jonsson njonsson

## The difference between the junior and senior Rails developer
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

## IMultiValueDictionary.cs
namespace System.Collections.Generic
{
    /// <summary>
    /// Represents a generic collection of keys paired with zero or more values
    /// each.
    /// </summary>
    /// <typeparam name="TKey">The type of the keys in the
    /// <see cref="IMultiValueDictionary{TKey,TValues}"/>.</typeparam>
    /// <typeparam name="TValues">The type of the value list elements in the
    /// <see cref="IMultiValueDictionary{TKey,TValues}"/>.</typeparam>

## directories_and_files.rb
module DirectoriesAndFiles

  module ClassMethods

    def directories(path)
      new(path).directories
    end

    def files(path)
      new(path).files

## poor_tevye.rb
require 'tevye'

poor_tevye = Tevye.new
result = catch(:miracle_of_miracles) do
  poor_tevye.live
end

## rich_tevye.rb
rich_tevye = Tevye.new
def rich_tevye.rich_man?
  true
end
result = catch(:miracle_of_miracles) do
  rich_tevye.live
end

## multiple_rescues.rb
begin
  do_something_error_prone
rescue AParticularKindOfError
  # Insert heroism here.
rescue Exception
  write_to_error_log
  raise
end

## multiple_catches.rb
catch :foo do
  catch :bar do
    do_something_that_can_throw_foo_or_bar
  end
end

## demo.html
<?xml version='1.0' encoding='utf-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html lang='en-US' xml:lang='en-US' xmlns='http://www.w3.org/1999/xhtml'>
  <head>
    <title>
      passwordComplexity jQuery plugin demo
    </title>
    <style type='text/css'>
      * {
        font-family: Helvetica, Arial, sans-serif;

## MintonsPlayhouse.cs
var mintonsPlayhouseCirca1941 = new Nightclub();
mintonsPlayhouseCirca1941.Bouncer = delegate(person)
{
    // Welcome, paying customers!
    var customer = person as ICustomer;
    if ((customer != null) && (customer.CashOnHand > 0)) return true;

    // Feel free to sit in ... if you can play, that is.
    var musician = person as IMusician;
    if ((musician != null) &&

## Nightclub.cs
using System;
using System.Collections.Generic;

class Nightclub
{
    private readonly List<Person> occupants = new List<Person>();

    public Nightclub()
    {
        occupants = new List<Person>();
	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
	namespace System.Collections.Generic
	{
	/// <summary>
	/// Represents a generic collection of keys paired with zero or more values
	/// each.
	/// </summary>
	/// <typeparam name="TKey">The type of the keys in the
	/// <see cref="IMultiValueDictionary{TKey,TValues}"/>.</typeparam>
	/// <typeparam name="TValues">The type of the value list elements in the
	/// <see cref="IMultiValueDictionary{TKey,TValues}"/>.</typeparam>
	module DirectoriesAndFiles

	module ClassMethods

	def directories(path)
	new(path).directories
	end

	def files(path)
	new(path).files
	require 'tevye'

	poor_tevye = Tevye.new
	result = catch(:miracle_of_miracles) do
	poor_tevye.live
	end
	rich_tevye = Tevye.new
	def rich_tevye.rich_man?
	true
	end
	result = catch(:miracle_of_miracles) do
	rich_tevye.live
	end
	begin
	do_something_error_prone
	rescue AParticularKindOfError
	# Insert heroism here.
	rescue Exception
	write_to_error_log
	raise
	end
	catch :foo do
	catch :bar do
	do_something_that_can_throw_foo_or_bar
	end
	end
	<?xml version='1.0' encoding='utf-8' ?>
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
	<html lang='en-US' xml:lang='en-US' xmlns='http://www.w3.org/1999/xhtml'>
	<head>
	<title>
	passwordComplexity jQuery plugin demo
	</title>
	<style type='text/css'>
	* {
	font-family: Helvetica, Arial, sans-serif;
	var mintonsPlayhouseCirca1941 = new Nightclub();
	mintonsPlayhouseCirca1941.Bouncer = delegate(person)
	{
	// Welcome, paying customers!
	var customer = person as ICustomer;
	if ((customer != null) && (customer.CashOnHand > 0)) return true;

	// Feel free to sit in ... if you can play, that is.
	var musician = person as IMusician;
	if ((musician != null) &&
	using System;
	using System.Collections.Generic;

	class Nightclub
	{
	private readonly List<Person> occupants = new List<Person>();

	public Nightclub()
	{
	occupants = new List<Person>();