etagwerker

# Departamento Version 1.0
class Departamento
  include DataMapper::Resource
  
  property :id, Serial
  property :nombre, String, :index => true

end

# Then I run rackup with DataMapper.auto_upgrade!, which creates the tables with the structure above.

jcasimir

Transactions

As your business logic gets complex you may need to implement transactions. The classic example is a bank funds transfer from account A to account B. If the withdrawal from account A fails then the deposit to account B should either never take place or be rolled back.

Basics

All the complexity is handled by ActiveRecord::Transactions. Any model class or instance has a method named .transaction. When called and passed a block, that block will be executed inside a database transaction. If there's an exception raised, the transaction will automatically be rolled back.

Example

jcasimir

Friendly URLs

By default, Rails applications build URLs based on the primary key -- the id column from the database. Imagine we have a Person model and associated controller. We have a person record for Bob Martin that has id number 6. The URL for his show page would be:

/people/6

But, for aesthetic or SEO purposes, we want Bob's name in the URL. The last segment, the 6 here, is called the "slug". Let's look at a few ways to implement better slugs.

chitchcock

Stevey's Google Platforms Rant

I was at Amazon for about six and a half years, and now I've been at Google for that long. One thing that struck me immediately about the two companies -- an impression that has been reinforced almost daily -- is that Amazon does everything wrong, and Google does everything right. Sure, it's a sweeping generalization, but a surprisingly accurate one. It's pretty crazy. There are probably a hundred or even two hundred different ways you can compare the two companies, and Google is superior in all but three of them, if I recall correctly. I actually did a spreadsheet at one point but Legal wouldn't let me show it to anyone, even though recruiting loved it.

I mean, just to give you a very brief taste: Amazon's recruiting process is fundamentally flawed by having teams hire for themselves, so their hiring bar is incredibly inconsistent across teams, despite various efforts they've made to level it out. And their operations are a mess; they don't real

cklanac

/***********************************************************************************************************************
***********************************************************************************************************************
* CONTENTS: 
* Native Object
* Object Literal
* Basic Object
* Psuedo-Class
* Self Executing/Invoking Structure
* Lazy Function
* Module Pattern

cihad

# Additional translations at https://github.com/plataformatec/devise/wiki/I18n

tr:
  devise:
    confirmations:
      confirmed: "Eposta adresiniz başırılı bir şekilde onaylandı."
      send_instructions: "Bir kaç dakika içerisinde eposta adresinizi nasıl onaylayacağınız hakkında bir eposta alacaksınız."
      send_paranoid_instructions: "Eğer eposta adresinizi veritabanımızda kayıtlı ise bir kaç dakika içerisinde eposta adresinizi nasıl onaylayacağınız hakkında bir eposta alacaksınız."
    failure:
      already_authenticated: "Zaten giriş yaptınız."

geekontheway

o.......Open files, directories and bookmarks....................|NERDTree-o|
go......Open selected file, but leave cursor in the NERDTree.....|NERDTree-go|
t.......Open selected node/bookmark in a new tab.................|NERDTree-t|
T.......Same as 't' but keep the focus on the current tab........|NERDTree-T|
i.......Open selected file in a split window.....................|NERDTree-i|
gi......Same as i, but leave the cursor on the NERDTree..........|NERDTree-gi|
s.......Open selected file in a new vsplit.......................|NERDTree-s|
gs......Same as s, but leave the cursor on the NERDTree..........|NERDTree-gs|
O.......Recursively open the selected directory..................|NERDTree-O|
x.......Close the current nodes parent...........................|NERDTree-x|

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

vigo

Ruby Tips

Genel

• Herşey bir Object (Nesne)
• Her Object BasicObjectden türemiş. (Objective-C NSObject gibi...)
• Object.methods ile o nesneye ait tüm method'lar
• Object.methods.inspect string olarak method'lar
• Mutlaka bir şey geriye döner. Hiçbir şey dönmese nil döner.

Style Guide

skyriverbend

#!/usr/local/bin/python
"""
To use this script, you must be in the root directory of a Rails project that
is using git. You should also make sure that your directory does not contain any
uncommitted changes. Then run:

    $ python rails_switch_branch.py name_of_another_branch

Running the above will do the following: