On Wednesday, 27 September 2017 at 14:23:01 UTC, Ky-Anh Huynh
wrote:
Hi,
I am from Ruby world where I can have `!` (or `?`) in method
names: `!` indicates that a method would modify its object
(`foo.upcase!` means `foo = foo.upcase`). ( I don't know if
there is any official Ruby documentation on this convention
though. )
In D I see `!` quite a lot. I have read the first 50 chapters
in Ali's book but nowhere I see a note on `!`. It's about the
compile thing, isn't it? E.g,
```
foo = formattedRead!"%s"(value);
```
But I also see `!` for some map/filter invocations. It's quite
confusing me.
Can you please explain and give any link where I can learn more
about these things?
Thanks a lot.
See also the following chapter in Ali's book:
http://ddili.org/ders/d.en/templates.html
