# for-each loop
for i in list
  # do something with item 'i'
  p i
end

# enumeration loop
list.each do |i|
  # do something with item 'i'
  p i
end

1

0

require 'net/http'
require 'yaml'

# install a given gem and version, may also give a URL 
def gem_install(gem, version, url=nil)  
  # only install if not already installed  
  listed = `gem list #{gem} --no-details --local`  
  unless listed =~ %r"^#{gem} "  
    puts "== Installing #{gem}"  
    puts `sudo gem install #{gem} -f -y -v '#{version}'`  
  end  
end  
  
# First try and find a local or given gems.yml file  
gems_config_file = ARGV[0].nil? ? 'gems.yml' : ARGV[0]  
gems = nil  
begin  
  gems = YAML::load_file( gems_config_file )  
rescue Errno::ENOENT => e  
  puts "Could not find file... looking remotely in the wiki Gems.yml"  
  
  url = URI.parse('http://wikiserver/')  
  res = Net::HTTP.start(url.host, url.port) do |http|  
    http.get("/index.php?action=raw&title=Gems.yml")  
  end  
  data = res.body  
  gems = YAML::load(data)  
end  
gems['gems'].each { |gem| gem_install(gem[0], gem[1]) }

1

0

Object.sort_by { |object| object[:object_attribute] }.each do |var|

     #do some cool stuff with var here		  

end

2

0

##################################### VIEW ##########################################

#12hr time with 15min intervals
<%= example_time_select(Time.now) %>

##################################### HELPER ######################################## 

def example_time_select(time) 
  return select_hour_with_twelve_hour_time(time, :field_name => 'hour',:prefix =>                      
    'time') + ":&nbsp;" + select_minute_with_interval_of_fifteen(time,
    :field_name => 'minute', :prefix => 'time')
end
  
def select_hour_with_twelve_hour_time(time, options = {})        
  val = time ? (time.kind_of?(Fixnum) ? time : time.hour) : ''
  if options[:use_hidden]
    hidden_html(options[:field_name] || 'hour', val, options)
  else
    hour_options = []
    0.upto(23) do |hour|
      ampm = hour <= 11 ? ' AM' : ' PM'
      ampm_hour = hour == 12 ? 12 : (hour / 12 == 1 ? hour % 12 : hour)

      hour_options << ((val == hour) ?
        %(<option value="#{hour}" 
        selected="selected">#{ampm_hour}#{ampm}</option>\n) :
        %(<option value="#{hour}">#{ampm_hour}#{ampm}</option>\n))
    end
      
    select_html(options[:field_name] || 'hour', hour_options, options)
    
  end
end
  
def select_minute_with_interval_of_fifteen(time, options = {})
  val = time ? (time.kind_of?(Fixnum) ? time : time.min) : ''
  if options[:use_hidden]
    hidden_html(options[:field_name] || 'minute', val, options)
  else
    minute_options = []
    minute = 0
    4.times do
      if minute == 0
        minute_options << ((val == minute) ?
          %(<option value="#{minute}" selected="selected">0#{minute}</option>\n) :
          %(<option value="#{minute}">0#{minute}</option>\n))
      else
        minute_options << ((val == minute) ?
          %(<option value="#{minute}" selected="selected">#{minute}</option>\n) :
          %(<option value="#{minute}">#{minute}</option>\n))     
      end
      minute += 15
    end
  end
  select_html(options[:field_name] || 'minute', minute_options, options)
end

2

0

@user = User.find(id).clone
@user.name = "Copy of " + @user.name
@user.save

1

1

def self.get_column_name(column_name)
  return column_name.downcase.gsub(/ /,'_')
end 
  
def self.get_column_type(column_name)
  for column in Object.content_columns 
    if column.name == get_column_name(column_name)
      return column.klass
    end
  end
end

2

0

# Notice we have to pass in the 'user_id' on both the find and create method.
def create_avoid_dups
  user_id = current_user.id

  # Find all user's posts
  user_posts = Post.find(:all, :conditions => ["user_id = ?", user_id])

  # Do some logic ...

  # then create new
  @post = Post.create(:body => params[:body], :user_id => user_id)
end

# with_scope lets us extract that parameter:
def create_avoid_dups
  Post.with_scope(:find => {:conditions => "user_id = #{current_user.id}"},
                  :create => {:user_id => current_user.id}) do

    # Find all user's posts
    # No longer need user_id condition since we're in scope
    user_posts = Post.find(:all)

    # Do some logic ...

    # then create new, without specifying user_id
    @post = Post.create(:body => params[:body])
  end
end

1

0

class Code < ActiveRecord::Base
  def to_param
    "#{id}-#{full_name.gsub(/[^a-z1-9]+/i, '-')[0,40]}"
  end
end

2

0