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# regex to add a comma after each char
# i believe you can think of it starting
# the () are required to capture each character
$show_choices =~ s/(?<=.)/,/g;
$show_choices =~ s/,$//g; # remove the last comma
$show_choices =~ s/(.)/$1,/g;
$show_choices =~ s/(.)(?!$)/$1,/g;
By rote learning.
Via Genetic memory.
It's provided by my firmware.
I just remember them.
Thirty days hath September
My computer gets it right, usually.
I just ask someone else.
Someone punches me on the first of the month.
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