jamesgary

How to Talk to Developers

Ben Orenstein (@r00k)

Obey Law of Demeter

• Reduces coupling
• Enables refactoring

Throw something weird at people to keep their attention. Bored people don't learn anything, so focus on entertainment over being informative.

Write like a newspaper

zmaril

I want to write software that helps kill people.

Please, before you call the police and get my github account put on lockdown, allow me a moment to explain. What I really want to do is work on projects that advance the human condition and improve people's lives. I've been in a mad dash to learn how to program for the past four or five years exactly because I realized how much good I could do for the world with a computer.

rogerleite

source 'https://rubygems.org'

gem "method_source", "~> 0.8.1"

mislav

Jim Weirich:

This is how I explain it… Ruby has Procs and Lambdas. Procs are created with Proc.new { }, lambdas are created with lambda {} and ->() {}.

In Ruby 1.8, proc {} creates lambda, and Ruby 1.9 it creates procs (don't ask).

Lambdas use method semantics when handling parameters, procs use assignment semantics when handling parameters.

This means lambdas, like methods, will raise an ArgumentError when called with fewer arguments than they were defined with. Procs will simply assign nil to variables for arguments that were not passed in.

domenic

This article has been given a more permanent home on my blog. Also, since it was first written, the development of the Promises/A+ specification has made the original emphasis on Promises/A seem somewhat outdated.

You're Missing the Point of Promises

Promises are a software abstraction that makes working with asynchronous operations much more pleasant. In the most basic definition, your code will move from continuation-passing style:

getTweetsFor("domenic", function (err, results) {
 // the rest of your code goes here.

piscisaureus

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = git@github.com:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

codeswimmer

// .h
@interface NSNumber (Ranges)

- (NSRange)to:(NSNumber *)rangeEnd;
- (BOOL)isInRange:(NSRange)range;

@end

// .m
@implementation NSNumber (Ranges)

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

darius

The point of sore or milk in hot cream. Any
Such matters. Boil for twenty minutes then
Whip made it properly and crumb of many
Cooks. Bake the public. Make the point. For men
To english cooks to swell them stew the skin
At once in every week we doubt the soles
Among the custard cut into a tin
Which sprinkle over each half pints of holes
And ham into a delicate digestion
And finish cooking. See page. Lemonade

scottwb

# Add these methods to your ApplicationController. Then, any controller
# that inherits from it will have these methods and can programmatically
# determine what filters it has set.
class ApplicationController < ActionController::Base

  def self.filters(kind = nil)
    all_filters = _process_action_callbacks
    all_filters = all_filters.select{|f| f.kind == kind} if kind
    all_filters.map(&:filter)
  end