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8.4

perl: print last 10 lines

Asked by lwinkenb in Perl Programming Language

Tags: last, 10, lines, print

I am searching through a file line by line:

foreach $line (<FILE>)
{
if($line eq "something special")
{
here I want to print out the last 10 lines before $line
}
}

I'm new to perl, so I wanted to check with the experts. My guess on the best way to implement this is to use a queue of some kind. Each time a line is read, add it to the queue. When the queue is larger than 10 items, dequeue a line when a new one is added.

Is that the best way to accomplish this? The file I will be reading has tens of thousands of lines, so I want to do this in the most efficient way possible.

Thanks.

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perl: print last 10 lines

Asked by lwinkenb in Perl Programming Language

Tags: last, 10, lines, print

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