Power Query Splitter syntax

Hi,
bit of theory can someone explain the parts of the

Splitter.SplitTextByCharacterTransition

I get how it works when used like this;

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so when it goes from lower case letter to number ( ok txt number), but if I use the interface;

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so does (c)=> represent each value of the source? which produces a list of true / false ? if anyone can explain or knows of a post / blog / information on how this breaks down I would be interested . Thanks.

Richard

Thanks, will have a read, i found rick de Groot's explanation of split by nothing the best I've read.

Richard.