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20 hours ago •
dlang
dlang
splitter() that doesn't eat sentinels
turkeyman reported this on 2016-07-18T09:03:34Z
Transfered from https://issues.dlang.org/show_bug.cgi?id=16288
CC List
- aronrobert293
- greeenify
- jack (@JackStouffer)
Description
I want a version of splitter that doesn't eat the sentinels.
I want to split AT the sentinels, but the sentinel should be the first
element of the bucket.
eg: assert(equal(splitter("hello world", ' '), [ "hello", " ", " world" ]));
Note the weird behaviour since there are 2 spaces. More useful when
the data is not strings.
jack (@JackStouffer) commented on 2016-07-18T20:19:29Z
Does std.regex.splitter!(Yes.keepSeparators) suffice?
turkeyman commented on 2016-07-19T00:40:24Z
That's fine.
Does that already exist? I couldn't see anything on dlang.org.
Obviously the Pred function should remain as the first template arg, it can be second...
jack (@JackStouffer) commented on 2016-07-19T04:00:14Z
(In reply to Manu from comment #2)
> That's fine.
> Does that already exist? I couldn't see anything on dlang.org.
>
> Obviously the Pred function should remain as the first template arg, it can
> be second...
It's in the nightlies and on the prerelease docs.
turkeyman commented on 2016-07-21T09:35:55Z
Wait up. I misread... you say std.regex.splitter.
No, that's not what I'm asking for. I'm interested in std.algorithm.iterator.splitter. It should be in those.
greeenify commented on 2016-12-30T21:18:06Z
pull: https://github.com/dlang/phobos/pull/5008
turkeyman commented on 2016-12-31T02:20:55Z
(In reply to greenify from comment #5)
> pull: https://github.com/dlang/phobos/pull/5008
Doesn't implement desired behaviour.
greeenify commented on 2016-12-31T08:14:41Z
> Doesn't implement desired behaviour.
Fair enough - I tried to make it similar to `splitter` in `std.regex`, but it seems that even this didn't work out:
"a..b.c".splitter!(Yes.keepSeparators)(regex("[.]")).writeln
> ["a", ".", "", ".", "b", ".", "c"]
"a..b.c".splitter!(Yes.keepSeparators)('.').writeln;
> ["a", ".", ".", "b", ".", "c"]
From the example you posted, you want it to yield sth. like this, right?
> ["a", ".", ".b", ".c"]
And there's another common use case - though that one is simply splitter.filter!`a.empty`:
> ["a", "b", "c"]
However, at least the existing behavior for No.keepSeparators is the same:
"a..b.c".splitter!(No.keepSeparators)(regex("[.]")).writeln
> ["a", "", "b", "c"]
"a..b.c".splitter!(No.keepSeparators)('.').writeln;
> ["a", "", "b", "c"]
turkeyman commented on 2020-07-18T11:40:21Z
They are all interesting cases. I think splitter should be configurable like this.