D

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%d date format string option
data access times, speeding up
data integrity, enforcing
data streams, sending to browsers
@data variable
--database=database_type option (rails)
databases
     Active Record, modeling with
     find, retrieving records with
     images, uploading to
     migrations, developing with
     MySQL
     ORM (object relational mapping) and
     pluralization patterns and
     PostgreSQL
     rows nested with acts_as_tree method
     scaffolding, development with
     schema, defining programmatically
     serving images from
     sessions, storing in
     setting up to use rails
     test databases, initializing
datasets, displaying with pagination
date columns
Date object
dates
datetime columns
db directory
db:test:clone_structure task (Rake)
Debian GNU
     mod_fastcgi and
     MySQL, installing
     PostgreSQL, installing
     Pound, installing
DEBUG (benchmark method)
debugging 2nd
     breakpointer and
     -cw option and
     exceptions, emailing
     filtering development logs
     HTTP communication with Firefox extensions
     JavaScript
     logger class, logging with
     object contents, displaying with exceptions
     Rails console, exploring
     ruby-debug and
     writing information to files
decrement_position method
default application layouts
delete helper (Capistrano)
DELETE method
delete method
     testing controllers and
delete statement (SQL)
deploying
     Pound
deployment
     Capistrano
         custom tasks, writing
         mongrel_cluster and
         multiple environments and
:descendant option (assert_tag)
destroy method
development
development mode
development runtime environments
Diceware method
dictlist method (Word class)
disable_web task (Capistrano)
discover command (plugin) 2nd
discrete graphs
div element object
Docbook controller
documentation, finding
DOM (Document Object Model)
     JavaScript, debugging
:domain parameter (ActionMailer::Base.server_settings)
domain specific language (DSL)
dot (.), creating Subversion repositories
download parameter
DRbStore 2nd
DRY (don't repeat yourself)
DSL (domain specific language)
dynamic attribute-based finders in Active Record