Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl-Sensitive Sunglasses

Re^3: Curious about Perl's strengths in 2018

by haukex (Bishop)
on Dec 14, 2019 at 23:31 UTC ( #11110162=note: print w/replies, xml ) Need Help??

in reply to Re^2: Curious about Perl's strengths in 2018
in thread Curious about Perl's strengths in 2018

When working with binary files, Perl can easily read just the first 512 bytes of a 5gb iso file. JavaScript cannot do that. It would try to read the entire file first, and there's nothing you can do to go around that. lol
#!/usr/bin/node "use strict"; /* perl -wMstrict -le 'open my $fh, "<:raw", "5gig.iso" or die $!; seek($fh,0x8000,0) or die $!; read($fh,my $buf,512)==512 or die; print unpack("H*",$buf)' */ // const fs = require('fs'); '5gig.iso', 'r', function (err, fd) { if (err) throw err; var buf = Buffer.alloc(512);, buf, 0, buf.length, 0x8000, function (err, bytesRead, buffer) { if (err) throw err; if (bytesRead!=buf.length) throw "not enough bytes read!"; console.log(buffer.toString('hex')); }); } );

Log In?

What's my password?
Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://11110162]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others chilling in the Monastery: (3)
As of 2022-05-24 20:10 GMT
Find Nodes?
    Voting Booth?
    Do you prefer to work remotely?

    Results (84 votes). Check out past polls.