Shawn questions

Shawn answers

• Delete duplicate JSON file based on one of the attributes
• How to determine whether a unicode character is fullwidth or halfwidth in Perl
• Run gcc -gcodeview
• Is it necessary to remove all file descriptors in the interest list before closing the epoll instance itself?
• Transform array to string using jq
• Is there a method to check if an array includes one value in SQLite?
• SQLITE json_group_array ordering
• Replace every 4th occurence of char "_" with "@" in multiple files
• How does : # use perl eval 'exec perl -S $0 ${1+"$@"}' set the perl version?
• Is there a standard/portable way to query if a symbol stands for a symbol macro?