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{{alias}}()
Returns an accumulator function which incrementally computes a range.
If provided a value, the accumulator function returns an updated range. If
not provided a value, the accumulator function returns the current range.
If provided `NaN`, the range is `NaN` for all future invocations.
Returns
-------
acc: Function
Accumulator function.
Examples
--------
> var accumulator = {{alias}}();
> var v = accumulator()
null
> v = accumulator( -2.0 )
0.0
> v = accumulator( 1.0 )
3.0
> v = accumulator( 3.0 )
5.0
> v = accumulator()
5.0
See Also
--------
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