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Iterator
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Method Iterator()->first()
- Method
first
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int(0..1) first()
- Description
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If this function is defined then it resets the iterator to point
to the first item.
- Returns
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Returns zero if there are no items at all in
the data set, one otherwise.
- Note
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It's not enough to set the iterator to the earliest accessible
item. If the iterator doesn't support backing up to the
original start position then this function should not be
implemented.
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