Class: Range

Inherits:
Object show all
Defined in:
lib/plist4r/mixin/ruby_stdlib.rb

Instance Method Summary collapse

Instance Method Details

#&(other_range) ⇒ Range?

The intersection of 2 ranges. Returns nil if there are no common elements.

Examples:

1..10 & 5..15 => 5..10

Returns:

  • (Range, nil) —

    The intesection between 2 overlapping ranges, or zero



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# File 'lib/plist4r/mixin/ruby_stdlib.rb', line 133

def & other_range
  case other_range
  when Range
    intersection = []
    each do |i|
      intersection << i if other_range.include? i
    end
    result = intersection.to_ranges
    case result[0]
    when Integer
      return (result[0])..(result[0])
    when Range, nil
      return result[0]
    end
  else
    raise "unsupported type"
  end
end

#include_range?(other_range) ⇒ true, false

Does this range wholely include other_range? (true or false)

Examples:

(3..5).include_range? (3..3)
=> true

(0..4).include_range? (6..7)
=> false

Returns:

  • (true, false) 


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# File 'lib/plist4r/mixin/ruby_stdlib.rb', line 160

def include_range? other_range
  case other_range
  when Range
    if other_range.first >= self.first && other_range.last <= self.last
      return true
    else
      return false
    end
  else
    raise "unsupported type"
  end
end

#size ⇒ Object

The Range’s computed size, ie the number of elements in range.

Examples:

(3..3).size
=> 1

(0..9).size
=> 10

Returns:

  • The size of the range



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# File 'lib/plist4r/mixin/ruby_stdlib.rb', line 125

def size
  last - first + 1
end