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simple examples

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Christophe Grand 2015-09-07 15:25:08 +02:00
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@ -101,6 +101,16 @@ That's why most of the time the last stage of the sub-transducer will be a `x/re
([false [0 2 4 6]] [true [1 3 5 7]])
```
## Simple examples
`(group-by kf coll)` is `(into {} (x/by-key kf (x/into []) coll))`.
`(plumbing/map-vals f m)` is `(into {} (x/by-key (map f)) m)`.
My faithful `(reduce-by kf f init coll)` is now `(into {} (x/by-key kf (x/reduce f init)))`.
`(frequencies coll)` is `(into {} (x/by-key identity (x/reduce x/count)) coll)`.
## License
Copyright © 2015 Christophe Grand