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digitalmars.D.learn - Splitting a stream of data on based on data change.

reply Taylor R Hillegeist <taylorh140 gmail.com> writes:
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?
Nov 21 2019
parent reply Alex <sascha.orlov gmail.com> writes:
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
Nov 21 2019
parent Taylor R Hillegeist <taylorh140 gmail.com> writes:
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.
Nov 21 2019