Yahoo Pipes is an amazing tool. However there are few things that are not quite straight forward for the non-programmer. Here in I show you you how to convert a given text into all upper case and all lower case. We would be using the “String Regex” module to accomplish this task. Yahoo Pipes Regex is similar on the lines of Perl languages Regex. We use the following constructs:

\U uppercase till \E
\L lowercase till \E
\E end case modification

Here is a full blown example:

http://pipes.yahoo.com/pipes/pipe.info?_id=d4e31803e737048b867303386c746cf9

http://pipes.yahoo.com/pipes/pipe.info?_id=8cd678ba8b5b15e8f03742fc17542d4f

Links:
Yahoo Pipes: Convert To UpperCase Example
Yahoo Pipes: Convert To LowerCase Example
Perl Regex Reference