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comp / comp.os.linux.misc / Re: How can I use sed to insert a character into a file?

SubjectAuthor
* How can I use sed to insert a character into a file?Jon Danniken
+- Re: How can I use sed to insert a character into a file?Nuno Silva
`* Re: How can I use sed to insert a character into a file?Thomas Zajic
 `- Re: How can I use sed to insert a character into a file?Jon Danniken

1
Subject: How can I use sed to insert a character into a file?
From: Jon Danniken
Newsgroups: comp.os.linux.misc
Organization: A noiseless patient Spider
Date: Mon, 8 Jul 2024 18:44 UTC
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From: nonesuch@nottodaynortomorroreither.org (Jon Danniken)
Newsgroups: comp.os.linux.misc
Subject: How can I use sed to insert a character into a file?
Date: Mon, 8 Jul 2024 13:44:54 -0500
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I'm sure this is trivial to most here, but sed confounds me. I have an
xml file with content following this format:

<type:color>000000</type:color>
<type:color>FFFFFF</type:color>

The information within the tags are hex colors (many different colors),
but they need to begin with a pound sign (#) to work in a particular
application, ie:

<type:color>#000000</type:color>
<type:color>#FFFFFF</type:color>

How can I use sed to append the pound symbol in this file? Using sed 4.8
BTW, thanks!

Subject: Re: How can I use sed to insert a character into a file?
From: Nuno Silva
Newsgroups: comp.os.linux.misc
Organization: A noiseless patient Spider
Date: Mon, 8 Jul 2024 19:43 UTC
References: 1
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From: nunojsilva@invalid.invalid (Nuno Silva)
Newsgroups: comp.os.linux.misc
Subject: Re: How can I use sed to insert a character into a file?
Date: Mon, 08 Jul 2024 20:43:00 +0100
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On 2024-07-08, Jon Danniken wrote:

> I'm sure this is trivial to most here, but sed confounds me. I have
> an xml file with content following this format:
>
> <type:color>000000</type:color>
> <type:color>FFFFFF</type:color>
>
> The information within the tags are hex colors (many different
> colors), but they need to begin with a pound sign (#) to work in a
> particular application, ie:
>
> <type:color>#000000</type:color>
> <type:color>#FFFFFF</type:color>
>
> How can I use sed to append the pound symbol in this file? Using sed
> 4.8 BTW, thanks!

in general, my guess would be something like (for sed's s command)

s@\(<type:color>\)\(......\)\(</type:color>\)@\1#\2\3@g

Other approaches will surely be possible, say, if these are the only
sequences of hex digits that show up, or if this always appears on a
line by itself (so maybe matching lines on <type:color> and then
replacing the sequence of digits with #& could be done too - & being the
matched text)

Treat this like it had been written on a napkin over my knee, I may have
made a stupid mistake above or overlooked something obvious, surely
others will chime in with better suggestions. There's also
comp.unix.programmers, and I think also a shell group, which might be
helpful audiences too.

--
Nuno Silva

Subject: Re: How can I use sed to insert a character into a file?
From: Thomas Zajic
Newsgroups: comp.os.linux.misc
Date: Mon, 8 Jul 2024 19:56 UTC
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From: zlatko@gmx.at (Thomas Zajic)
Newsgroups: comp.os.linux.misc
Subject: Re: How can I use sed to insert a character into a file?
Date: Mon, 8 Jul 2024 21:56:01 +0200
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* Jon Danniken <nonesuch@nottodaynortomorroreither.org>

> I'm sure this is trivial to most here, but sed confounds me. I have an
> xml file with content following this format:
>
> <type:color>000000</type:color>
> <type:color>FFFFFF</type:color>
>
> The information within the tags are hex colors (many different colors),
> but they need to begin with a pound sign (#) to work in a particular
> application, ie:
>
> <type:color>#000000</type:color>
> <type:color>#FFFFFF</type:color>
>
> How can I use sed to append the pound symbol in this file? Using sed 4.8

sed -i -e 's,<type:color>,<type:color>#,' file.xml

Could be done more sophistic & elegant, but I think it's more readable
this way. :-)

HTH & HAND
Thomas
--
=-------------------------------------------------------------------------=
- Thomas "ZlatkO" Zajic <zlatko@gmx.at> Linux-6.6 & slrn-1.0.3a -
- "In layman's terms: speedy thing goes in, speedy thing comes out." -
=-------------------------------------------------------------------------=

Subject: Re: How can I use sed to insert a character into a file?
From: Jon Danniken
Newsgroups: comp.os.linux.misc
Organization: A noiseless patient Spider
Date: Mon, 8 Jul 2024 21:47 UTC
References: 1 2
Path: eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: nonesuch@nottodaynortomorroreither.org (Jon Danniken)
Newsgroups: comp.os.linux.misc
Subject: Re: How can I use sed to insert a character into a file?
Date: Mon, 8 Jul 2024 16:47:17 -0500
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On 7/8/24 14:56, Thomas Zajic wrote:
> * Jon Danniken <nonesuch@nottodaynortomorroreither.org>
>
>> I'm sure this is trivial to most here, but sed confounds me. I have an
>> xml file with content following this format:
>>
>> <type:color>000000</type:color>
>> <type:color>FFFFFF</type:color>
>>
>> The information within the tags are hex colors (many different colors),
>> but they need to begin with a pound sign (#) to work in a particular
>> application, ie:
>>
>> <type:color>#000000</type:color>
>> <type:color>#FFFFFF</type:color>
>>
>> How can I use sed to append the pound symbol in this file? Using sed 4.8
>
> sed -i -e 's,<type:color>,<type:color>#,' file.xml
>
> Could be done more sophistic & elegant, but I think it's more readable
> this way. :-)
>
>
> HTH & HAND
> Thomas
Thank you Thomas, that worked great! Very much appreciated.

Jon

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