I was looking through the standard library for a good way to split a range into several ranges based on value changes in the stream:

AAAAAAABBBBBB
would be split on the AB transition into:
AAAAAAA BBBBBB

I just couldn't figure out an elegant way to do it? Any ideas?

On Thursday, 21 November 2019 at 21:36:08 UTC, Taylor R Hillegeist wrote:
> I was looking through the standard library for a good way to split a range into several ranges based on value changes in the stream:
>
> AAAAAAABBBBBB
> would be split on the AB transition into:
> AAAAAAA BBBBBB
>
> I just couldn't figure out an elegant way to do it? Any ideas?

Like this?

´´´
void main()
{
    import std;
    "AAAAAAABBBBBB"
        .chunkBy!((a,b) => a == b)
        .writeln;
}
´´´

https://dlang.org/library/std/algorithm/iteration/group.html
https://dlang.org/library/std/algorithm/iteration/chunk_by.html

On Thursday, 21 November 2019 at 22:11:59 UTC, Alex wrote:
> On Thursday, 21 November 2019 at 21:36:08 UTC, Taylor R Hillegeist wrote:
>> I was looking through the standard library for a good way to split a range into several ranges based on value changes in the stream:
>>
>> AAAAAAABBBBBB
>> would be split on the AB transition into:
>> AAAAAAA BBBBBB
>>
>> I just couldn't figure out an elegant way to do it? Any ideas?
>
> Like this?
>
> ´´´
> void main()
> {
>     import std;
>     "AAAAAAABBBBBB"
>         .chunkBy!((a,b) => a == b)
>         .writeln;
> }
> ´´´
>
> https://dlang.org/library/std/algorithm/iteration/group.html
> https://dlang.org/library/std/algorithm/iteration/chunk_by.html

Just like that.