Matt Frantz created TINKERPOP3-673:
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Summary: limit(local, 1) should emit element, not List
Key: TINKERPOP3-673
URL: https://issues.apache.org/jira/browse/TINKERPOP3-673
Project: TinkerPop 3
Issue Type: Improvement
Components: process
Reporter: Matt Frantz
The philosophy of the TP3 API is "containers only when necessary". There is a
tendency to eschew the container when its size would be one.
For example, {{select("foo")}} will not emit a {{Map}} with a single key/value,
but instead will emit a single value. Similarly, if any {{select}} of a step
label finds only a single instance of that step in the path, it will emit the
value at that step; only if multiple steps in the path have the same label will
a {{List}} be created.
In that spirit, {{limit(local, 1)}} should emit an element, rather than a
one-element {{List}}.
This would also mean that {{range(local)}} operating on a {{List}} would emit a
single element if the number of elements is selected by the range is 1.
This would also reconcile the behavior with the {{tail}} step.
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