Class: Array

Inherits:
Object
  • Object
show all
Defined in:
lib/dm_ruby_extensions/extend_array.rb

Overview

Instance Method Summary collapse

Instance Method Details

#closest_max(value) ⇒ Object

Return the value that is closest to the value in the array, rounded down. [0,5,7,8,11,16].closest_max(6) => 5 [0,5,7,8,11,16].closest_max(7) => 7



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# File 'lib/dm_ruby_extensions/extend_array.rb', line 21

def closest_max(value)
  self.select{|item| item <= value}.max
end

#css_join(delimiter = '') ⇒ Object

given an array of css classes/styles, join them into one string. only join non-nil/non-empty strings, and return nil if the result is an empty string (rails tag methods will not include the attribute if it is nil, which is desirable for cleaner html)



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# File 'lib/dm_ruby_extensions/extend_array.rb', line 41

def css_join(delimiter = '')
  str = self.flatten.delete_if {|x| x.nil? || x == ''}.join(' ')
  str == '' ? nil : str
end

#extract_options! ⇒ Object

Extract options from a set of arguments. Removes and returns the last element in the array if it’s a hash, otherwise returns a blank hash.

def options(*args)
  args.extract_options!
end

options(1, 2)           # => {}
options(1, 2, :a => :b) # => {:a=>:b}



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# File 'lib/dm_ruby_extensions/extend_array.rb', line 13

def extract_options!
  last.is_a?(::Hash) ? pop : {}
end

#xss_aware_join(delimiter = '') ⇒ Object

able to join safe and unsafe strings



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# File 'lib/dm_ruby_extensions/extend_array.rb', line 27

def xss_aware_join(delimiter = '')
  ''.html_safe.tap do |str|
    each_with_index do |element, i|
      str << delimiter if i > 0
      str << element
    end
  end
end