Categories:
.NET (357)
C (330)
C++ (183)
CSS (84)
DBA (2)
General (7)
HTML (4)
Java (574)
JavaScript (106)
JSP (66)
Oracle (114)
Perl (46)
Perl (1)
PHP (1)
PL/SQL (1)
RSS (51)
Software QA (13)
SQL Server (1)
Windows (1)
XHTML (173)
Other Resources:
How to read from a pipeline with Perl
How to read from a pipeline with Perl
✍: Guest
Example 1: To run the date command from a Perl program, and read the output of the command, all you need are a few lines of code like this: open(DATE, "date|"); $theDate = <DATE>; close(DATE); The open() function runs the external date command, then opens a file handle DATE to the output of the date command. Next, the output of the date command is read into the variable $theDate through the file handle DATE. Example 2: The following code runs the "ps -f" command, and reads the output: open(PS_F, "ps -f|"); while (<PS_F>) { ($uid,$pid,$ppid,$restOfLine) = split; # do whatever I want with the variables here ... } close(PS_F);
2013-09-05, 2007👍, 0💬
Popular Posts:
What are the two kinds of comments in JSP and what's the difference between them? <%-- JSP Co...
How To Test Transaction Isolation Levels? - MySQL FAQs - Transaction Management: Commit or Rollback ...
How To Recover a Dropped Index? - Oracle DBA FAQ - Managing Oracle Table Indexes If you have the rec...
Where Do You Download JUnit? Where do I download JUnit? I don't think anyone will ask this question ...
How To Enter a New Row into a Table Interactively? - Oracle DBA FAQ - Introduction to Oracle SQL Dev...