Re: Tie::File surprise (to me)

In article <x7r6rao1yf.fsf@xxxxxxxxxxxxxxxx>,
Uri Guttman <uri@xxxxxxxxxxxxxxx> wrote:

"b" == boyd <tbmoore9@xxxxxxxxxxx> writes:

b> I probably should have known this, but didn't. In Tie::File, where you
b> tie an array to a long file, and you want to read backwards from the end
b> of it ( to look for the most recent lines, for example, in a log file),
b> it is much faster to address the lines with $index as a negative number,
b> meaning to search from the end of the array. It takes a while for the
b> module to find the index = -1, but the subsequent searches on -2, -3,
b> etc. are much faster than using @#array-1, @#array-2, etc.

you should use File::ReadBackwards for that. much faster than tying a
log file.

uri

Thanks, uri. I didn't know about File::ReadBackwards.

Boyd
.

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