On Wednesday, 12 January 2022 at 05:27:08 UTC, forkit wrote:
I am familiar with the concept of a slice in D.
However, a slice is a consecutive slice, is in not? (e.g)
[4..$-1]
I would like a slice (or a view, or whatever name you wanna
call it), of particular elements within an array that may not
be consecutive. e.g. [4-7,8,10,13-16]
Consider below:
I want a slice/view on this array that only contains elements
with the string "one".
["one", "one", "two", "one", "two", "one", "one", "two]
Most importantly, I do NOT want to allocate - so the slice/view
needs to be 'referencing' existing data (not copying it).
Yes, I can hard code it, C style. I already know this.
Does phobos offer something like this?
Yes std.algorithm : filter.
```d
import std.stdio : writeln;
import std.algorithm : filter;
void main()@safe{
auto a = ["one", "one", "two", "one", "two", "one",
"one", "two"];
writeln(a);
writeln(a.filter!(x => x == "one"));
}
```
