Perl中的系统与反引号和管道之间有什么区别?
问题描述：
Perl支持三种(我知道)运行外部程序的方式:
Perl supports three ways (that I know of) of running external programs:
system:
system PROGRAM LIST
如:
system "abc";
反引号，如:
`abc`;
通过管道运行它，如下所示:
running it through a pipe as in:
open ABC, "abc|";
它们之间有什么区别?这就是我所知道的:
What are the differences between them? Here's what I know:
- 您可以使用反引号和管道轻松获得命令的输出.
- 就是这样(以后会进行更多编辑吗?)
答
-
system():运行命令并返回命令的退出状态 - 反引号:运行命令并返回命令的输出
- pipes:运行命令，并允许您将它们用作句柄
-
system(): runs command and returns command's exit status - backticks: runs command and returns the command's output
- pipes : runs command and allows you to use them as an handle
反引号也将执行的程序的STDOUT重定向到变量，然后系统将其发送到主程序的STDOUT.
Also backticks redirects the executed program's STDOUT to a variable, and system sends it to your main program's STDOUT.