Class: Array

Inherits:
Object show all
Defined in:
lib/cool_extensions/array.rb

Instance Method Summary collapse

Instance Method Details

#sort_by_list(ordered_list, &block) ⇒ Object

# Example

class Person

attr_accessor :type, :name, :source
def initialize(options)
  @type=options[:type]
  @name=options[:name]
  @source=options[:source]
end

end

type_sort_list = %w(User Admin Salesman) source_sort_list = %w(web email direct mail television) myarr = [] myarr << Person.new(:source=>“direct”, :type=>“Admin”, :name=>“Jason”) myarr << Person.new(:source=>“mail”, :type=>“User”, :name=>“Xavier”) myarr << Person.new(:source=>“email”, :type=>“User”, :name=>“Josh”) myarr << Person.new(:source=>“email”, :type=>“Salesman”, :name=>“Pablo”) myarr << Person.new(:source=>“web”, :type=>“User”, :name=>“Pat”) myarr << Person.new(:source=>“television”, :type=>“Salesman”, :name=>“Ross”)

# Sort by type sorted_by_type_myarr = myarr.sort_by_list(type_sort_list) do |item|

item.type

end puts sorted_by_type_myarr.to_yaml

# Sort by source sorted_by_source_myarr = myarr.sort_by_list(source_sort_list) do |item|

item.source

end puts sorted_by_source_myarr.to_yaml



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# File 'lib/cool_extensions/array.rb', line 37

def sort_by_list(ordered_list, &block)
  new_ol = ordered_list.inject({}){|new_hash, sort_item| new_hash[sort_item] = ordered_list.index(sort_item); new_hash}
  sorted = self.map{|item| [item, new_ol[block.call(item)] || 0]}.sort_by{|item| item[1]}.map{|item| item[0]}
end

#uniquify(&block) ⇒ Object 



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# File 'lib/cool_extensions/array.rb', line 42

def uniquify(&block)
  items = []
  comparables = self.map{|item| block.call(item)}
  added_list = []
  self.each do |item|
    parsed = block.call(item)
    unless added_list.include?(parsed)
      added_list << parsed
      items << item 
    end
  end
  items
end