One of the great things about Perl is the fact that, by design, it is possible to do really useful things without getting bogged down in complexity. It's the most versatile programming language I've ever used in that respect. I use one-liners all the time, and I've written, when necessary, large scripts to perform fairly complicated tasks. Since you are new to the language, one suggestion is to learn about scalar and list context and when to use which. Another is to explore the delights of the hash data structure. It's useful to learn the basics of regular expression matching too. Have you looked at the Tutorials section of this site? It should give you many ideas.
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