reduce
accepts
1 input stream,
an accumulator,
a seed (optional)
-
❯The
seedwill be used as an initial accumulation acc -
❯When the input stream emits a value v:
- v and the latest acc are given to the
accumulator - the returned value will be used as the next acc
- v and the latest acc are given to the
- ❯When the input stream completes, the output stream emits the last acc and completes
returns a new stream of accumulated values
max
accepts
- ❯(coming soon)
returns
Revised on Monday, 8 Oct. 2018
This is how a ❚ max operator would operate with an input stream:
- When the input stream completes, the output stream:
- emits the largest value emitted on the input stream
- and immediately completes
Some reactive stream libraries (eg. RxJS) provide this ❚ max operator, while others don’t. How would you code max yourself?
Comparer function
In RxJS, ❚ min and ❚ max accept on optional comparer function as an argument.
For example:
See also
Freelance Developer Advocate. Motion graphics with code. JavaScript and Elm. cedricsoulas.com
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