Module: RubyExtension::Array::InstanceMethods

Defined in:
lib/ruby_extension/array.rb

Overview

module ClassMethods # :nodoc: end

Instance Method Summary collapse

Instance Method Details

#arrange(new_array_index = []) ⇒ Object

‘a’,‘b’,‘c’].arrange() => [‘c’,‘a’,‘b’ 


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# File 'lib/ruby_extension/array.rb', line 16

def arrange(new_array_index=[])
	new_array = self.dup
	new_array_index.each_with_index do |index,new_index|
		new_array[new_index] = self[index]
	end
	new_array
end

#average ⇒ Object

Return the average digitized value of the array



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# File 'lib/ruby_extension/array.rb', line 48

def average
	if self.length > 0
		#	sum defined in activesupport/lib/active_support/core_ext/enumerable.rb
		self.digitize.sum.to_f / self.length
	else
		nil
	end
end

#capitalize ⇒ Object

Return capitlized versions of each item in the array



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# File 'lib/ruby_extension/array.rb', line 30

def capitalize
	collect(&:capitalize)
end

#capitalize! ⇒ Object

Capitalize each item in the array and return it



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# File 'lib/ruby_extension/array.rb', line 35

def capitalize!
	each_with_index do |element,index|
		self[index] = element.capitalize
	end
	self
end

#downcase ⇒ Object

Return downcased versions of each item in the array



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# File 'lib/ruby_extension/array.rb', line 43

def downcase
	collect(&:downcase)
end

#drop_blanks! ⇒ Object

Remove all “blank?” items for the array



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# File 'lib/ruby_extension/array.rb', line 25

def drop_blanks!
	delete_if{|a|a.blank?}
end

#false? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ruby_extension/array.rb', line 123

def false?
	!empty? && any?{|v| v.false? }
end

#first_index(value = nil, &block) ⇒ Object

return the first index of the array with a value matching that given



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# File 'lib/ruby_extension/array.rb', line 97

def first_index(value = nil, &block)
	using_block = block_given?
	each_with_index do |element,index|
		return index if (using_block && yield(element)) || (value == element)
	end
	return nil
end

#median ⇒ Object

Return the median digitized value of the array



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# File 'lib/ruby_extension/array.rb', line 58

def median
	if self.length > 0
		sorted_values = self.digitize.sort
		length = sorted_values.length
		if length.odd?
			sorted_values[length/2]
		else
			( sorted_values[length/2] + sorted_values[-1+length/2] ).to_f / 2
		end
	else
		nil
	end
end

#numericize ⇒ Object Also known as: digitize

Convert all items in the array to_f



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# File 'lib/ruby_extension/array.rb', line 88

def numericize
	collect(&:to_f)
end

#swap_indexes(i, j) ⇒ Object

Return a copy of the array with values at the given indexes swapped.



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# File 'lib/ruby_extension/array.rb', line 74

def swap_indexes(i,j)
	new_array = self.dup
	new_array[i],new_array[j] = self[j],self[i]
	new_array
end

#swap_indexes!(i, j) ⇒ Object

Swap the values of an array at the given indexes and return it



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# File 'lib/ruby_extension/array.rb', line 82

def swap_indexes!(i,j)
	self[i],self[j] = self[j],self[i]
	self
end

#to_boolean ⇒ Object Also known as: to_b 



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# File 'lib/ruby_extension/array.rb', line 105

def to_boolean
	!empty? && all?{|v| v.to_boolean }
end

#true? ⇒ Boolean

[].true?

> false

[true].true?

> true

[true,false].true?

> true

[false].true?

> false

Returns:

  • (Boolean) 


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# File 'lib/ruby_extension/array.rb', line 119

def true?
	!empty? && any?{|v| v.true? }
end

#true_xor_false? ⇒ Boolean

I need to work on this one …

Returns:

  • (Boolean) 


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# File 'lib/ruby_extension/array.rb', line 128

def true_xor_false?
#			self.include?('true') ^ self.include?('false') ^
#				self.include?(true) ^ self.include?(false)
	contains_true = contains_false = false
	each {|v|
#				( v.to_boolean ) ? contains_true = true : contains_false = true
		eval("contains_#{v.to_boolean}=true")
	}
	contains_true ^ contains_false
end