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Re^3: Short version of database push for multiple variables

by Eliya (Vicar)
on May 13, 2012 at 20:19 UTC ( #970327=note: print w/ replies, xml ) Need Help??


in reply to Re^2: Short version of database push for multiple variables
in thread Short version of database push for multiple variables

BTW, AFAICT, split /\t/ on two consecutive tabs wouldn't return undef, but rather '' (the empty string):

$ perl -MData::Dumper -e'@a = split /\t/, "foo\t\tbar"; print Dumper \ +@a' $VAR1 = [ 'foo', '', 'bar' ];

So the whole "//" thing is moot anyway.  It wouldn't even work:

$ perl -MData::Dumper -e'@a = map $_//"NA", split /\t/, "foo\t\tbar"; +print Dumper \@a' $VAR1 = [ 'foo', '', 'bar' ];

In other words, you probably want:

$ perl -MData::Dumper -e'@a = map $_ ne "" ? $_ : "NA", split /\t/, "f +oo\t\tbar"; print Dumper \@a' $VAR1 = [ 'foo', 'NA', 'bar' ];


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Re^4: Short version of database push for multiple variables
by Anonymous Monk on May 13, 2012 at 20:59 UTC
    Thanks Eliya that worked great. However as jwkrahn wrote the split need -1 so it won't miss the last element. Jwkrahn your code gives me "Warning: Use of "length" without parentheses is ambiguous at" which is a shame cause it's a nice and easy to understand code.

      Then you just need to add parentheses:

      my @fields = map length() ? $_ : 'NA', split /\t/, $Line, -1;

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