Process moritz' list of perlmonks questions into material for the workshop

moritz++' gist reproduced here:

general CS questions:
- how does a PRNG work?
- how to compute permutations
- is $a an integer power of $b?
Text processing:
- reading two files interleaved
- extract an iframe from HTML
- split a long number into smaller numbers, each at least of value 31
Data structures:
- remove duplicate values from array
- questions about dereferencing syntax
- who does one deep clone objects?
- how can I look up a variable with a variable name?
- how to interpolate variables into a JSON string?
Other:
- formatting of dates/times
- what is Mojolicious, and should I use it?
- who to implement a timeout

masak / workshop