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Fravadona has asked 18 questions and find answers to 19 problems.

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Fravadona questions

Saving $! (process ID of last background command) as an array element
Bash function: Is there a way to check if a variable was defined locally?
AWK equivalent to `read -r _ _ remainder`
decoding base64 encoded text with POSIX awk
Unescape C-like strings from GetText with perl
How to revert N choose 2 combinations?
Getting the total count of IDs from a comma delimited list of IDs that can contain ranges with awk
Characterise Awk regex engine
Classify input numbers into fixed ranges, several million of times
Why does "echo" operate like "echo -e" in my bash?

Fravadona answers

Multiline output to single line concatenation with delimiter string
Saving $! (process ID of last background command) as an array element
How to outer-join two CSV files, using shell script?
Is there any benefit of executing "| xargs" without any arguments?
What is the correct onliner for a column filter expression using Perl?
Unescape C-like strings from GetText with perl
How to efficiently split file into arbitrary byteranges in ruby
How to filter values in a date range when the exact timestamps are not entered in the log
How to rename all files in a directory and subdirectories?
Concatenate multiple input sources into a single IO object in Ruby