34 lines
816 B
Plaintext
34 lines
816 B
Plaintext
|
|
{{alias}}()
|
|
Returns an accumulator function which incrementally computes a sum.
|
|
|
|
If provided a value, the accumulator function returns an updated sum. If not
|
|
provided a value, the accumulator function returns the current sum.
|
|
|
|
If provided `NaN` or a value which, when used in computations, results in
|
|
`NaN`, the accumulated value is `NaN` for all future invocations.
|
|
|
|
For long running accumulations or accumulations of large numbers, care
|
|
should be taken to prevent overflow.
|
|
|
|
Returns
|
|
-------
|
|
acc: Function
|
|
Accumulator function.
|
|
|
|
Examples
|
|
--------
|
|
> var accumulator = {{alias}}();
|
|
> var s = accumulator()
|
|
null
|
|
> s = accumulator( 2.0 )
|
|
2.0
|
|
> s = accumulator( -5.0 )
|
|
-3.0
|
|
> s = accumulator()
|
|
-3.0
|
|
|
|
See Also
|
|
--------
|
|
|