opz | MIDI parser for OP-Z sequencer by teenage engineering | Audio Utils library

I was trying to extract all the citations from a LaTeX file, that is, being able to extract everything in between the two curly braces following \cite (ie, \cite{bla,blo} would give me bla and blo). There are a few corner cases: \cite{} may contain one or more citations separated by comma (and there is no comma if there is only one citation) and the \cite{} command may span over multiple lines.

So far, I came up with the following one liner which works well:

I'm developing a java library to manage different kinds of barcode in Crystal Report. Crystal Report offers a sdk for Eclipse and inside a new project there are library to develop the integration between a ERP and CR. One of this library manage barcodes, but is a poor library because I can manage just a kind of barcode. I found a document to implement UFL. The document offers a simple example and thanks of that I wrote some class to manage three kinds of barcode, but there are some Crystal report function with two paramaters, and the example doesn't show how to get right implementation. I tried to develop new classes to manage that kind of function but Always I get this message of error:"the call to a function does not correspond to any overload of 'name of function'".

For this function I tried to pass only a parameter and the application runs well. I did an overload of the method, passing two parameters, but always I've got the same message of error.

this is a part of my code

I made this piece of code:

As a simplified example I have printf "abc\ndef\nghi\n" | grep -oPz '\w{2}(?=c|f|i)\n' and that does not match anything, however grep -oPz '\w{2}(?=(c|f|i)\n)' does. Why is that? I need the newline in the output.

Desired output is to match the rows and output them without the lookahead part eg. ab\n

I'm not very fluent in bash but actively trying to improve, so I'd like to ask some experts here for a little suggestion :)

Let's say I've got a following text file: