GNU bug report logs - #21511
sed not performing as specified

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Beagleburt <bruce.gilbert <at> gmail.com>
To: bug-sed <at> gnu.org
Subject: sed not performing as specified
Date: Fri, 18 Sep 2015 18:14:28 +1200

[Message part 1 (text/plain, inline)]

I am doing an online course "Introduction to Linux"
[image: edX] Home Page <https://www.edx.org> LinuxFoundationX: LFS101x.2
Introduction to Linux
Chapter 13: Manipulating Text; Section 2. sed & awk

~$ cat > test1
This is a Sample Test File for the sed command.
The sed command is used to edit contents in a file.
For example, the sed command is used to replace words in a line or file.
~$ sed s/is/are/ test1
Thare is a Sample Test File for the sed command.
The sed command are used to edit contents in a file.
For example, the sed command are used to replace words in a line or file.

As you can see above the 1st instance of "is" in "This" is replaced by
"are" giving "Thare"; BUT the following two lines also have "is" replaced
by "are" EXCEPT for the "is" after "Thare". It is ALMOST as if I had
invoked the global: sed s/is/are/g test1 EXCEPT for the 2nd "is" after
"Thare"?

I am using sed version: sed (GNU sed) 4.2.2

'b'ye - Bruce Gilbert.



"For we have not been given a spirit of fear, but a spirit of Power; of
Love; & of a Sound Mind." 2nd Timothy, chapter 1, verse 7.

[Message part 2 (text/html, inline)]

Message #8 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Davide Brini <dave_br <at> gmx.com>
To: bug-sed <at> gnu.org
Subject: Re: bug#21511: sed not performing as specified
Date: Fri, 18 Sep 2015 10:39:14 +0200

On Fri, 18 Sep 2015 18:14:28 +1200, Beagleburt <bruce.gilbert <at> gmail.com>
wrote:

> I am doing an online course "Introduction to Linux"
> [image: edX] Home Page <https://www.edx.org> LinuxFoundationX: LFS101x.2
> Introduction to Linux
> Chapter 13: Manipulating Text; Section 2. sed & awk
> 
> ~$ cat > test1
> This is a Sample Test File for the sed command.
> The sed command is used to edit contents in a file.
> For example, the sed command is used to replace words in a line or file.
> ~$ sed s/is/are/ test1
> Thare is a Sample Test File for the sed command.
> The sed command are used to edit contents in a file.
> For example, the sed command are used to replace words in a line or file.
> 
> As you can see above the 1st instance of "is" in "This" is replaced by
> "are" giving "Thare"; BUT the following two lines also have "is" replaced
> by "are" EXCEPT for the "is" after "Thare". It is ALMOST as if I had
> invoked the global: sed s/is/are/g test1 EXCEPT for the 2nd "is" after
> "Thare"?

Sed replaces the first instance of "is" in each line with "are". Nothing
unexpected, no bug.


-- 
D.

Message #11 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Beagleburt <bruce.gilbert <at> gmail.com>
To: bug-sed <at> gnu.org
Subject: Re: sed not performing as specified
Date: Sat, 19 Sep 2015 18:14:45 +1200

[Message part 1 (text/plain, inline)]

MY MISTAKE - I MISUNDERSTOOD THE VIDEO ABOUT sed. PLEASE IGNORE MY "bug"
REPORT! SORRY!

"For we have not been given a spirit of fear, but a spirit of Power; of
Love; & of a Sound Mind." 2nd Timothy, chapter 1, verse 7.

On 18 September 2015 at 18:14, Beagleburt <bruce.gilbert <at> gmail.com> wrote:

> I am doing an online course "Introduction to Linux"
> [image: edX] Home Page <https://www.edx.org> LinuxFoundationX: LFS101x.2
> Introduction to Linux
> Chapter 13: Manipulating Text; Section 2. sed & awk
>
> ~$ cat > test1
> This is a Sample Test File for the sed command.
> The sed command is used to edit contents in a file.
> For example, the sed command is used to replace words in a line or file.
> ~$ sed s/is/are/ test1
> Thare is a Sample Test File for the sed command.
> The sed command are used to edit contents in a file.
> For example, the sed command are used to replace words in a line or file.
>
> As you can see above the 1st instance of "is" in "This" is replaced by
> "are" giving "Thare"; BUT the following two lines also have "is" replaced
> by "are" EXCEPT for the "is" after "Thare". It is ALMOST as if I had
> invoked the global: sed s/is/are/g test1 EXCEPT for the 2nd "is" after
> "Thare"?
>
> I am using sed version: sed (GNU sed) 4.2.2
>
> 'b'ye - Bruce Gilbert.
>
>
>
> "For we have not been given a spirit of fear, but a spirit of Power; of
> Love; & of a Sound Mind." 2nd Timothy, chapter 1, verse 7.
>

[Message part 2 (text/html, inline)]

Message #16 received at 21511-done <at> debbugs.gnu.org (full text, mbox):

From: Jim Meyering <jim <at> meyering.net>
To: Davide Brini <dave_br <at> gmx.com>
Cc: 21511-done <at> debbugs.gnu.org
Subject: Re: bug#21511: sed not performing as specified
Date: Sat, 19 Sep 2015 09:35:40 -0700

tags 21511 notabug
thanks

On Fri, Sep 18, 2015 at 1:39 AM, Davide Brini <dave_br <at> gmx.com> wrote:
...
>> "are" giving "Thare"; BUT the following two lines also have "is" replaced
>> by "are" EXCEPT for the "is" after "Thare". It is ALMOST as if I had
>> invoked the global: sed s/is/are/g test1 EXCEPT for the 2nd "is" after
>> "Thare"?
>
> Sed replaces the first instance of "is" in each line with "are". Nothing
> unexpected, no bug.

Thanks for responding Davide.
I'm responding to the bug-number address, but with "-done" inserted to
close the auto-created "issue": 21511-done <at> debbugs.gnu.org.
I added the two lines at the top of this message to record in the
issue database that this is not a bug.

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