Technically that case would be a matter of `supremum` handling empty
arrays, not `f` elements per se.
On Jun 21, 2017 8:48 AM, "Alexander Ilin" <ajs...@yandex.ru> wrote:
```
{ f f f f } sift supremum
-> error is thrown
```
21.06.2017, 18:44, "Alex Vondrak" <ajvond...@gmail.com>:
Or you could call `sift supremum`: http://docs.factorcode.org/content/word-
sift,sequences.html
Might be instructive to give the codebase a search, see how often that
pattern is used. (Can't do it myself right now - on mobile.)
On Jun 21, 2017 8:39 AM, "Alexander Ilin" <ajs...@yandex.ru> wrote:
Hello!
How would you like if `supremum` tolerated the `f` elements?
Now:
```
{ f 0 1 2 } supremum
-> error is thrown
{ f f f f } supremum
-> error is thrown
```
Proposition:
```
{ f 0 1 2 } supremum
-> 2
{ f f f f } supremum
-> f
```
Current code:
```
: supremum ( seq -- elt )
[ ] [ max ] map-reduce ;
```
Proposed code:
```
: supremum ( seq -- elt )
[ ] [ 2dup and [ max ] [ dupd ? ] if ] map-reduce ;
```
If you like what you are seeing, I'll make a formal PRoposal.
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