split function

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Re: split function by jethro (Monsignor) on Jul 28, 2011 at 17:03 UTC
split does not need $_, $_ is just the default, i.e. it is the variable it uses if you don't specify one. `@x= split /,/; #splits $_ @x= split /,/,$nod; #splits $nod` [download]	[reply] [d/l]
Re: split function by toolic (Bishop) on Jul 28, 2011 at 17:21 UTC
Additionally, the docs for split are available at your command prompt: `perldoc -f split` [download]	[reply] [d/l]
Re: split function by davido (Cardinal) on Jul 28, 2011 at 17:31 UTC
Let's say that the first column is delimited with a comma, and there could never be another comma embedded within the first column: `perl -pi.bak -e '$_ = ( split /,/, $_, 2 )[1];' myfile.txt` [download] That works by splitting each line into two parts; the part that comes before the comma, and the part that comes after. The comma is gobbled up. Then take only the second part, and return it back to $_ for output. You could do it with s/// too: `perl -pi.bak -e 's/^[^,]*,//' myfile.txt` [download] Here we match everything from start of line, up to and including the first comma, and substitute that match with '' (nothing). Dave	[reply] [d/l] [select]
Re: split function by locked_user sundialsvc4 (Abbot) on Jul 29, 2011 at 12:14 UTC
Perl is very big on “brevity.” You can “say a lot with a little,” if you want to. One of the ways that you can do it is through these implied, pre-defined variables. See perlvar. You are not obliged to use `$_`, but you will encounter code that does. Lots of it. “Whatever you choose to do, just make it abundantly clear.”