Extracted from Pike v7.6 release 13 at 2006-10-17.
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ADT
ADT.Sequence
ADT.Sequence()->SequenceIterator

Method ADT.Sequence()->SequenceIterator()->has_previous()


Method has_previous

int(0..1) has_previous(void|int steps)

Returns

Returns true if it is possible to move steps steps backwards, if steps weren't supplied it check if it is possible to move one step backward.