Sponsored Content
Top Forums Shell Programming and Scripting Is Rule 7 of POSIX shell grammar rules written correctly? Post 302978867 by Mark_Galeck on Friday 5th of August 2016 02:54:13 AM
Old 08-05-2016
Thank you bakunin for your reply, but your reply is not relevant to my question. I spent a lot of time writing the question and I guess you did not have time to read it as carefully as I had wrote it.

However, your reply did help, in that, while thinking whether it is relevant or not, I finally understood the whole thing.

For the benefit of newbies, I will post my understanding and answers here:

1 and 2. Yes. Of course these labels are misleading, and make the grammar hard to understand for newbies.

3. No. Instead, it is best to apply Rule 7b also to the 2 productions in the grammar, that reduce cmd_prefix to ASSIGNMENT_WORD.

4. No. I misunderstood here how the "rules" are applied. I thought, you first perform the reduction, then somehow apply the rule (which makes no sense). Instead, you use the rule first, in order to allow the reduction.
 

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Simple shell script to be written

There are 2 shell script files sh1 and sh2. sh2 contains records such as 01 02 03 on different lines. In sh1, I would like to read each record of sh2 till end of file, concatenate them with a comma(,) and store in a variable. Can somebody please help me with the sh1 script? Thanks in... (2 Replies)
Discussion started by: shsandeep
2 Replies

2. Shell Programming and Scripting

Simple shell script to be written

There are 2 shell script files sh1 and sh2. sh2 contains records such as 01 02 03 on different lines. In sh1, I would like to read each record of sh2 till end of file, concatenate them with a comma(,) and store in a variable. Can somebody please help me with the sh1 script? Thanks in... (6 Replies)
Discussion started by: shsandeep
6 Replies

3. Shell Programming and Scripting

what's the largest shell script you've ever written?

I've just written a test harness using ksh. One of scripts weighed in at 1206 lines. I came across Eric Raymonds 'Art of Unix programming' on line and he advises against excessively large scripts. I am very interested to hear people's opinions on this and any experiences they have had. (2 Replies)
Discussion started by: OFFSIHR
2 Replies

4. UNIX for Dummies Questions & Answers

can a korn shell script be written on HP-UNIX?

Is HP UNIX and Korn different flavours of unix? can a korn shell script be written on HP Unix? (4 Replies)
Discussion started by: soujanya_srk
4 Replies

5. Solaris

Jumpstart -- Warning: Could not find matching rule in rules.ok

I just setup a new jumpstart server, and I'm having problems with rules.ok errors. I'm coming up blank after many Google searches, forum searches, etc..... This is the error I receive: Skipped interface e1000g1 Attempting to configure interface e1000g0... Configured interface e1000g0... (0 Replies)
Discussion started by: christr
0 Replies

6. Programming

How could I interact with shell script from webportal written in php?

Hello, I am new on PHP scripting .I have shell scripts which I an running currently from linux server but now I want to make a web portal from where I will run all my scripts but the problem is all my scripts ask for parameters so I am getting confused how could I run my shell script from web... (2 Replies)
Discussion started by: anuragpgtgerman
2 Replies

7. Shell Programming and Scripting

Shell grammar question: logical OR in test

Hi, I am trying to check if two input files exist before the rest of the scripts is run. Following is the code that I have but it gives me syntax error. if then echo "File not found" else echo "File found" fi (3 Replies)
Discussion started by: nua7
3 Replies

8. Shell Programming and Scripting

Pure POSIX shell scripting...

Hi all... This is more of a concensus question than help... As many of you know I am experimenting with the limitations of Pure POSIX shell scripting. Q: Is the directory /bin considered part of the Pure POSIX shell or must I stick entirely with the builtins only? The reason is I... (2 Replies)
Discussion started by: wisecracker
2 Replies

9. Shell Programming and Scripting

Equivalent to let command in POSIX shell

Hi all, I am learning POSIX shell programming, and the book I read, uses the let command for integer arithmetic. I have downloaded and use the shellcheck program on Linux. This programs says: In POSIX sh, 'let' is undefined. See the screenshot attached. What is the POSIX... (1 Reply)
Discussion started by: johnprogrammer
1 Replies
CSS::DOM::Rule::Media(3pm)				User Contributed Perl Documentation				CSS::DOM::Rule::Media(3pm)

NAME
CSS::DOM::Rule::Media - CSS @media rule class for CSS::DOM VERSION
Version 0.14 SYNOPSIS
use CSS::DOM; my $media_rule = CSS::DOM->parse( '@media print { body { background: none } }' )->cssRules->[0]; # OR: use CSS::DOM::Rule::Media; my $media_rule = new CSS::DOM::Rule::Media $parent; push @{$media_rule->media}, 'print'; $media_rule->insertRule('body { background: none }') DESCRIPTION
This module implements CSS @media rules for CSS::DOM. It inherits from CSS::DOM::Rule and implements the CSSMediaRule DOM interface. METHODS
media Returns the MediaList associated with the @media rule (or a plain list in list context). This defaults to an empty list. You can pass a comma-delimited string to the MediaList's "mediaText" method to set it. cssRules In scalar context, this returns a CSS::DOM::RuleList object (simply a blessed array reference) of CSS::DOM::Rule objects. In list context it returns a list. insertRule ( $css_code, $index ) Parses the rule contained in the $css_code, inserting it the @media rule's list of subrules at the given $index. deleteRule ( $index ) Deletes the rule at the given $index. SEE ALSO
CSS::DOM CSS::DOM::Rule CSS::DOM::MediaList perl v5.10.1 2010-12-10 CSS::DOM::Rule::Media(3pm)
All times are GMT -4. The time now is 12:05 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy