Greetings oh wise ones,

I was trying to write a one liner in perl6 to do something very like grep -f patternFile.txt searchFile.txt but applied to a single column within the search file.

perl6 -ne 'BEGIN {my @ids="patternFile.txt".IO.lines}{my @F=lines.split("\t"); if @F[0] (elem) @ids.Set {@F.join("\t").say}}' searchFile.txt

I noticed that the automatic splitting flag -a is not longer available so generated @F the longhand way.

but it seems i can't get to @ids from within second set of curly braces - i've not quite wrapped my head around some of the new scope rules in perl6 so tried fiddling with a few things in that area but didn't make any progress.

I've also not seen any example perl6 1 liners which use the BEGIN{}{}END{} structures so though that might have someting to do with it.

Any suggestions?

What is true is already so. Owning up to it doesn't make it worse. - Eugene Gendlin

In reply to perl6 phasers and a 1 liner by RichardJActon

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