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pad an undersized first window with undefined #16

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pad an undersized first window with undefined #16

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7 changes: 6 additions & 1 deletion spec.emu
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Original file line number Diff line number Diff line change
Expand Up @@ -48,7 +48,12 @@ copyright: false
1. Let _buffer_ be a new empty List.
1. Repeat,
1. Let _value_ be ? IteratorStepValue(_iterated_).
1. If _value_ is ~done~, return ReturnCompletion(*undefined*).
1. If _value_ is ~done~, then
1. If _buffer_ is not empty and the number of elements in _buffer_ < ℝ(_windowSize_), then
1. Repeat, while the number of elements in _buffer_ < ℝ(_windowSize_),
1. Append *undefined* to _buffer_.
1. Perform ? Yield(CreateArrayFromList(_buffer_)).
1. Return ReturnCompletion(*undefined*).
1. Append _value_ to _buffer_.
1. If the number of elements in _buffer_ is ℝ(_windowSize_), then
1. Let _completion_ be Completion(Yield(CreateArrayFromList(_buffer_))).
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