class Lab42::Stream::Empty
Public Class Methods
new()
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# File lib/lab42/stream/empty.rb, line 47 def self.new @__instance__ ||= allocate end
Public Instance Methods
append(other)
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# File lib/lab42/stream/empty.rb, line 19 def append other raise ArgumentError, "not a stream #{other}" unless self.class.superclass === other # ??? Is the to_stream message a good idea other.to_stream end
Also aliased as: +
empty?()
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# File lib/lab42/stream/empty.rb, line 26 def empty?; true end
head()
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# File lib/lab42/stream/empty.rb, line 29 def head; raise StopIteration, "head called on empty stream" end
inject(*args;)
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# File lib/lab42/stream/empty.rb, line 33 def inject *args; args.first end
Also aliased as: __inject__
itself(*;)
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# File lib/lab42/stream/empty.rb, line 36 def itself *; self end
scan( initial, * )
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# File lib/lab42/stream/empty.rb, line 38 def scan( initial, * ) [initial] end
scan1( * )
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# File lib/lab42/stream/empty.rb, line 42 def scan1( * ) [] end
tail()
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# File lib/lab42/stream/empty.rb, line 30 def tail; raise StopIteration, "tail called on empty stream" end