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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2021/08/28 13:14:06 UTC

[GitHub] [arrow] lidavidm commented on pull request #11023: ARROW-12712: [C++] String repeat kernel

lidavidm commented on pull request #11023:
URL: https://github.com/apache/arrow/pull/11023#issuecomment-907624892


   You may instead be interested in two things I added recently: [ArrayBuilder::AppendScalar(const Scalar&, int64_t)](https://github.com/apache/arrow/blob/master/cpp/src/arrow/array/builder_base.h#L123) and [ArrayBuilder::AppendArraySlice](https://github.com/apache/arrow/blob/master/cpp/src/arrow/array/builder_base.h#L129). This would let you implement a generalized repeat without allocating and concatenating lots of intermediate arrays, and would let you preallocate the final array as well. 


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