Beefy Boxes and Bandwidth Generously Provided by pair Networks
more useful options

Re: how to avoid opening and closing files

by pvaldes (Chaplain)
on Jun 18, 2012 at 18:19 UTC ( #976870=note: print w/replies, xml ) Need Help??

in reply to how to avoid opening and closing files

Can I just open once a file and remove all lines together having words stored in words.txt?

See map and grep

(and specially "grep (!/regex/) the_file", where regex should match words stored in words.txt

my @X; while(<INFILE>){ push @X,(split(/\s+/,$_))[0];} ### choosing particular column and pushing all its values in single ar +ray

I guess that a hash (%X) could be better here, but if you want an array, think in an unique sorted list or so. The idea is to avoid duplicates.

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://976870]
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others contemplating the Monastery: (3)
As of 2017-06-26 23:19 GMT
Find Nodes?
    Voting Booth?
    How many monitors do you use while coding?

    Results (595 votes). Check out past polls.