This is one of those weird little things that I figured would make more sense to me in the morning ... but it's not. I'm sure I'm overlooking something silly.

I'm splitting a string in such a way that lots of the 'fields' are empty. At first i thought these would come back as empty strings (ie: ''), but evidently I was wrong -- they're undefiend... 

bester:~> perl -Mstrict -Mwarnings -le 'print "defined!" if defined( (
+split /\//, "2|3|||||")[4]);'
bester:~>

[download]

No big deal, I'll just use map to convert the undefs -- or maybe not... 

bester:~> perl -Mstrict -Mwarnings -le 'print "defined!" if defined( (
+map { defined($_) ? $_ : ""; } (split /\//, "2|3|||||") )[4]);'
bester:~>

[download]

This is when i decided it was time to get some sleep, but looking at it in the sunlight, I'm still not seeing my problem.

ideas?

In reply to split/map weirdness: empty strings vs undef by hossman

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