perl 中glob函数的使用

最新推荐文章于 2025-11-05 14:04:23 发布

转载最新推荐文章于 2025-11-05 14:04:23 发布 · 1.2k 阅读

本文详细介绍了 Perl 中的 glob 函数及其用法。glob 函数能够返回与指定表达式匹配的所有文件名列表，并遵循 csh 风格的扩展规则。文章还提供了使用 glob 函数的示例代码。

Example

Try out following example: Here glob will retun all the files which begin with "perl_g"

#!/usr/bin/perl

(@file_list) = glob "perl_g*";

print "Returned list of file @file_listn";

[@more@] Syntax

glob EXPR

glob

Definition and Usage

Returns a list of files matching EXPR as they would be expanded by the standard Bourne shell. If the EXPR does not specify a path, uses the current directory. If EXPR is omitted, the value of $_ is used.

From Perl 5.6 on, expansion is done internally, rather than using an external script. Expansion follows the csh (and any derivatives, including tcsh and bash) style of expansion, which translates as the following:

Files beginning with a single period are ignored unless EXPR explicitly matches.
The * character matches zero or more characters of any type.
The ? character matches one character of any type.
The [..] construct matches the characters listed, including ranges, as per regular expressions.
The ~ characters matches the home directory; ~name matches the home directory for the user name.
The {..} construct matches against any of the comma-separated words enclosed in the braces.

www.tutorialspoint.com/perl/perl_glob.htm

Return Value

In scalar context undef on error otherwise First file in the list of expanded names
In list context Empty list on error otherwise List of expanded file names.

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