barelyknown

When looping through a set of Salesforce.com SObjects from a VisualForce page, you may want to test whether the SObject has any children without wrapping the SObjects in a wrapper class. Here's how:

Controller:
Create a property in the controller that is a map of the parent IDs and Boolean flag.

public Map<Id, Boolean> hasChildren {
  get {
    if (this.hasChildren == null) {
      for (Parent__c parent : [select id, (select id from children__r) from parent__c]) {
        if (parent.children__r.size() > 0) {

barelyknown

Map<Id, ${1/./\u$0/:enumerate}__c> $1Map = new Map<Id, ${1/./\u$0/}__c>();
for (${1/./\u$0/}__c $1: $1s) {
  $1Map.put($1.id, $1);
}

barelyknown

def standardize(query)
  query.upcase! # IbM => IBM
  query.gsub!(/(\A|(?<=\s))(\w)\s&\s(\w)(\z|(?=\s))/,"\\2&\\3") # A & P => A&P
  query.gsub!(/((\A|(?<=[\s\.]))\w(\z|[\s\.]+))+/, query.scan(/((\A|(?<=[\s\.]))(\w)(\z|[\s\.]+))/).collect do |match|
    match[2]
  end.join + " ") # I.B.M. or I. B. M.  => IBM
  query.gsub!(/\s+/," ") # MY  FIRST  TRUCKING  CO => MY FIRST TRUCKING CO
  query.gsub!("'","") # AL'S TOY BARN => ALS TOY BARN
  query.strip! # "    IBM    " => IBM
  query

barelyknown

module Cacheable
  extend ActiveSupport::Concern

  def cacheback(relationship)
    if relationship.cacheable_attributes.any?
      relationship.target_attributes.each do |target_attribute|
        relationship.target.each { |member| member.send("calc_#{target_attribute}")}
      end
      relationship.target.each(&:save!)
    end

barelyknown

def earliest_window_end
  @earliest_window_end ||= {}
end

def method_missing(method, *args, &block)
  if method =~ /^(.+?)_earliest_window_end(\=*)$/
    !$2.blank? ? earliest_window_end[$1] = args[0] : earliest_window_end[$1]
  end
end

barelyknown

# Simple approach to sending email from the Rails console
# Implementation idea courtesy of Steve Klabnik
# http://blog.steveklabnik.com/posts/2012-09-09-random-ruby-tricks--class-new

# Create the mailer class with a block and assign to a variable
mailer = Class.new(ActionMailer::Base) do
  def example_message
    mail(to: "test@test.com", from: "test@test.com", subject: "Example Message") do |format|
      format.text { render text: "Example message body" }
    end

barelyknown

class String

  # Change "HelloWorld" into "Hello World" while keeping "HELLOWORLD" as "HELLOWORLD"
  # Useful as an alternative to humanize when presenting a list of class names

  def space_case
    split(/((?<=[a-z])[A-Z])/).inject { |whole, part| whole += (part =~ /^[A-Z]$/) ? " #{part}" : part }
  end

end

barelyknown

# This:

# <div name="#{@article.div_name"}>

# Instead of:

# <div name="<%= "#{@article.class.to_s.underscore}[#{@article.try(:id)}]"></div>

# What's the DRY way that you'd recommend to include this method (and other similar ideas) in every decorator?

barelyknown

Players playing an edge and corner strategy with player 2 looking for a 1st defended corner. Strategies defined as ruby procs:

    EDGE_AND_CORNER = ->(move) do
      move.score[:covered] + move.score[:defended] + move.score[:edges] + move.score[:corners]
    end
    
    CORNER_LOVER = ->(move) do
      score = move.score[:covered] + move.score[:defended] + move.score[:edges] + move.score[:corners]
      score += 10 if (move.score[:corners_defended_before] == 0 && move.score[:corners_defended_after] > 0)
      score

barelyknown

# Any arbitrary strategy is supported. Some predefined strategies are included too.
module Linotype
  class Strategy
    EDGE_AND_CORNER = ->(move) do
      move.score[:covered] + move.score[:defended] + move.score[:edges] + move.score[:corners]
    end
    CORNER_LOVER = ->(move) do
      score = move.score[:covered] + move.score[:defended] + move.score[:edges] + move.score[:corners]
      score += 10 if (move.score[:corners_defended_before] == 0 && move.score[:corners_defended_after] > 0)
      score