Class: Array

Inherits:
Object
  • Object
show all
Includes:
CoreExtensions::Array::DuplicatesCounter
Defined in:
lib/ib/gateway.rb

Overview

module GWSupport provide AR4- ActiveRelation-like-methods to Array-Class refine Array do

Instance Method Summary collapse

Methods included from CoreExtensions::Array::DuplicatesCounter

#count_duplicates

Instance Method Details

#first_or_create(item, *condition, &b) ⇒ Object

returns the item (in case of first) or the hole array (in case of create)



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# File 'lib/ib/gateway.rb', line 12

def first_or_create item, *condition, &b
  int_array = if condition.empty? 
      [ find_all{ |x| x == item } ] if !block_given?
    else
      condition.map{ |c| find_all{|x| x[ c ] == item[ c ] }}
    end || []
  if block_given?
    relation = yield
    part_2 = find_all{ |x| x.send( relation ) == item.send( relation ) }
    int_array <<  part_2 unless part_2.empty?
  end
  # reduce performs a logical "&" between the array-elements
  # we are only interested in the first entry
  r= int_array.reduce( :& )
  r.present? ? r.first : self.push( item ) 
end

#intercept ⇒ Object

performs [ [ array ] & [ array ] & [..] ].first



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# File 'lib/ib/gateway.rb', line 35

def intercept
  a = self.dup
  s = a.pop
  while a.present?
    s = s & a.pop
  end
  s.first unless s.nil?  # return_value (or nil)
end

#update_or_create(item, *condition, &b) ⇒ Object 



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# File 'lib/ib/gateway.rb', line 28

def update_or_create item, *condition, &b
  member = first_or_create( item, *condition, &b) 
  self[ index( member ) ] = item  unless member.is_a?(Array)
  self  # always returns the array 
end