Download E-books Perl 5 by Example PDF

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By David Medinets

This e-book is the same to all different by means of instance books in that it presents a jump-start to the Perl language for either new programmers and skilled programmers alike. It concentrates seriously on exhibiting readers the best way to software just like current courses which are brought up during the e-book as examples.

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Create an array of out of the characters within the $buffer variable and iterate over that array utilizing a foreach loop. Print the price of the present array point in hexadecimal structure. Print a newline personality. the present array aspect is a newline personality. directory nine. eleven 09LST11. PL-Reading a dossier to teach that Binary Mode doesn't realize the End-of-File personality http://www. pbs. mcp. com/ebooks/0789708663/ch9. htm (22 of 38) [29/06/1999 12:11:59] Chapter nine -- utilizing documents $buffer = ""; open(FILE, "; regrettably, there's no comparable method to learn a whole dossier right into a hash. yet, it is nonetheless lovely effortless to do. the subsequent instance will use the road quantity because the hash key for every line of a dossier. http://www. pbs. mcp. com/ebooks/0789708663/ch9. htm (23 of 38) [29/06/1999 12:11:59] Chapter nine -- utilizing records Open the fastened. DAT dossier for analyzing. for every line of mounted. DAT create a hash aspect utilizing the list quantity precise variable ($. ) because the key and the road of enter ($_) because the worth. shut the dossier. Iterate over the keys of the hash. Print each one key, price pair. directory nine. 12 09LST12. PL-Reading a hard and fast size checklist with fastened size Fields right into a Hash open(FILE, ") { $hash{$. } = $_; } close(FILE); foreach (keys %hash) { print("$_: $hash{$_}"); } This application screens: 1: 1212Jan Jaspree Painter 2: 3453Kelly Horton Jockey instance: Getting dossier facts The dossier try operators can let you know much a couple of dossier, yet occasionally you wish extra. In these instances, you utilize the stat() or lstat() functionality. The stat() returns dossier details in a 13-element array. you could go both a dossier deal with or a dossier identify because the parameter. If the dossier cannot be came across or one other errors happens, the null record is lower back. directory nine. thirteen exhibits the way to use the stat() functionality to determine information regarding the EOF. DAT dossier used prior within the bankruptcy. Assign the go back checklist from the stat() functionality to thirteen scalar variables. http://www. pbs. mcp. com/ebooks/0789708663/ch9. htm (24 of 38) [29/06/1999 12:11:59] Chapter nine -- utilizing documents Print the scalar values. directory nine. thirteen 09LST13. PL-Using the stat() functionality ($dev, $ino, $mode, $nlink, $uid, $gid, $rdev, $size, $atime, $mtime, $ctime, $blksize, $blocks) = stat("eof. dat"); print("dev = $dev\n"); print("ino = $ino\n"); print("mode = $mode\n"); print("nlink = $nlink\n"); print("uid = $uid\n"); print("gid = $gid\n"); print("rdev = $rdev\n"); print("size = $size\n"); print("atime = $atime\n"); print("mtime = $mtime\n"); print("ctime = $ctime\n"); print("blksize = $blksize\n"); print("blocks = $blocks\n"); within the DOS setting, this software screens: dev = 2 ino = zero mode = 33206 http://www.

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