On 2011-05-15 18:28, Mike McClain wrote:
In reading in a file of space separated columns of numbers and stuffing them into an array, I used: while( my $line =<$FH> ) { my @arr = split /\s+/, $line; push @primes_array, @arr; }but kept getting empty array entries until I switched to: while(<$FH> ) { my @arr = split; push @primes_array, @arr; } perldoc -f split says: If EXPR is omitted, splits the $_ string. If PATTERN is also omitted, splits on whitespace (after skipping any leading whitespace). My question is what RE do I need to pass to split to get the same return from split /$RE/, $line; as I get from the split against $_.
That can be your question, but have you also compared the lines with the differences? They probably start with whitespace.
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