Search results
Results from the WOW.Com Content Network
#!/usr/bin/perl print "Hello, World!\n"; The hash mark character introduces a comment in Perl, which runs up to the end of the line of code and is ignored by the compiler (except on Windows). The comment used here is of a special kind: it’s called the shebang line.
qrpff is a Perl script created by Keith Winstein and Marc Horowitz of the MIT SIPB. [1] It performs DeCSS in six or seven lines. The name itself is an encoding of "decss" in rot-13. The algorithm was rewritten 77 times to condense it down to six lines. [2] In fact, two versions of qrpff exist: a short version (6 lines) and a fast version (7 lines).
The need to explain the what is a sign that it is too complex and should be re-worked. "Don't document bad code – rewrite it." [9] "Good comments don't repeat the code or explain it. They clarify its intent. Comments should explain, at a higher level of abstraction than the code, what you're trying to do." [10]
#!usr/bin/perl – called the "shebang line", after the hash symbol (#) and ! (bang) at the beginning of the line. It is also known as the interpreter directive. # – the number sign, also called the hash symbol. In Perl, the # indicates the start of a comment. It instructs perl to ignore the rest of the line and not execute it as script code.
will fix the problem. This is actually a pretty common mistake, and perl will catch it for you if you turn "warnings" on. To do that, change the first line to: #!/usr/bin/perl -w and perl will say: Useless use of sort in void context at line 10. which is a little obscure, but at least tells you to look for trouble on that line.
CGI.pm is a large and once widely used Perl module for programming Common Gateway Interface (CGI) web applications, providing a consistent API for receiving and processing user input. There are also functions for producing HTML or XHTML output, but these are now unmaintained and are to be avoided. [ 1 ]
It is common for Perl modules to have embedded documentation in Perl's Plain Old Documentation format. POD imposes little structure on the author. POD imposes little structure on the author. It is flexible enough to be used to write articles, web pages and even entire books such as Programming Perl .
/usr: Secondary hierarchy for read-only user data; contains the majority of user utilities and applications. Should be shareable and read-only. [9] [10] /usr/bin: Non-essential command binaries (not needed in single-user mode); for all users. /usr/include: Standard include files. /usr/lib: Libraries for the binaries in /usr/bin and /usr/sbin ...