Getopt « System Functions « Perl
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Perl
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System Functions
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Getopt
1.
Simple options
2.
GetOptions("file=s" => \$file);
3.
Generate random passwords?
4.
Extract command-line switches with Getopt::Std
5.
Perform consistent command line parsing
6.
Process complex command lines
7.
Read from a file
8.
To turn a feature on or off. Use the exclamation point(!)
9.
Using Getopt to deal with command line options
10.
getopt('pMN');
11.
If the value is optional, use a colon
12.
For a text string value, use :s for an optional value or =s for a required value:
13.
Check if a file exists
14.
A double dash (--) by itself signals the end of the command-line switches.
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