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Re: Get unique fields from file

by choroba (Cardinal)
on Jan 06, 2022 at 12:00 UTC ( [id://11140218]=note: print w/replies, xml ) Need Help??


in reply to Get unique fields from file

The first argument of split is a regex, not a string. "|" is an alternative of two empty strings. 
my @fields = split "|", 'abc|def';
print join ', ', @fields;  # a, b, c, |, d, e, f

[download]
If you want to split on the literal vertical bar, you need to backslash it. 
my @fields = split /\|/, 'abc|def';
print join ', ', @fields;  # abc, def

[download]
map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

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