On Wed, 2006-29-03 at 15:53 +0000, Saurabh Singhvi wrote:
> HI there,
>
> I have a huge file (~7GB) of text data. I need to parse it to extract
> something : basically minima and maxima, and then i need to quantify
> the data into an output file based on ranges.
>
> Now the problem is that the traditional method of opening and foreach
> which is as follows:
>
> open(FILE,"data.txt");
> $min = 100;
> $max = 0;
>
> foreach $data (<FILE>) {
while( $data = <FILE> ){
> if ($min > $data ) {
> $min = $data ;
> }
> elsif ($max < $data) {
> $max = $data ;
> }
> }
> print $max, $min;
> close FILE;
>
> fails to work, as perl is trying to load the complete file into memory!
>
> Now i also tried changing it to STDIN instead, by catting the data from
> the text file.
>
> ./script.pl < data.txt
>
> but this too gave the same error
>
> Out of memory!
>
> So kindly help me on how to do this thing.
>
> thanks
> Saurabh
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