Class: Array

Inherits:
Object show all
Defined in:
lib/ruco/core_ext/array.rb,
lib/ruco/core_ext/array.rb,
lib/ruco/core_ext/array.rb

Overview

madeofcode.com/posts/74-ruby-core-extension-array-sum

Direct Known Subclasses

Ruco::Position

Instance Method Summary collapse

Instance Method Details

#<(other) ⇒ Object 



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# File 'lib/ruco/core_ext/array.rb', line 18

def <(other)
  (self.<=>other) == -1
end

#<=(other) ⇒ Object 



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# File 'lib/ruco/core_ext/array.rb', line 22

def <=(other)
  self.<(other) or self.==other
end

#>(other) ⇒ Object 



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# File 'lib/ruco/core_ext/array.rb', line 26

def >(other)
  (self.<=>other) == 1
end

#>=(other) ⇒ Object 



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# File 'lib/ruco/core_ext/array.rb', line 30

def >=(other)
  self.>(other) or self.==other
end

#between?(a, b) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ruco/core_ext/array.rb', line 14

def between?(a,b)
  self.>= a and self.<= b
end

#map_with_index(&block) ⇒ Object 



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# File 'lib/ruco/core_ext/array.rb', line 7

def map_with_index(&block)
  dup.map_with_index!(&block)
end

#map_with_index! ⇒ Object 



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# File 'lib/ruco/core_ext/array.rb', line 3

def map_with_index!
  each_with_index do |e, idx| self[idx] = yield(e, idx); end
end

#sum(method = nil, &block) ⇒ Object 



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# File 'lib/ruco/core_ext/array.rb', line 37

def sum(method = nil, &block)
  if block_given?
    raise ArgumentError, "You cannot pass a block and a method!" if method
    inject(0) { |sum, i| sum + yield(i) }
  elsif method
    inject(0) { |sum, i| sum + i.send(method) }
  else
    inject(0) { |sum, i| sum + i }
  end
end