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Whitespace in SED
I thought that \s was for whitespace, but the following does not seem to
work. What am I missing?
s/^ \*\s*defin/ * Defin/I
I'm trying to fix the following comment block in some code. I want to force
two spaces between the asterisk and the initial "d", as well as convert the
"d" to uppercase. The spacing could be a combination of spaces or tabs (ie.
whitespace). The word "defining" could also be "define".
* defining buffer lengths
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 fmankal (2)
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1/8/2004 6:42:04 PM |
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frank wrote:
> I thought that \s was for whitespace, but the following does not seem to
> work. What am I missing?
The sed NG perhaps ;-) ?
> s/^ \*\s*defin/ * Defin/I
>
> I'm trying to fix the following comment block in some code. I want to force
> two spaces between the asterisk and the initial "d", as well as convert the
> "d" to uppercase. The spacing could be a combination of spaces or tabs (ie.
> whitespace). The word "defining" could also be "define".
>
> * defining buffer lengths
>
This will work:
sed 's/^ \*[ ]*[dD]efin/ * Defin/'
where there's a single blank followed by a single tab within the first
square brackets. For general white-space, look at the [:space:]
construct in GNU sed.
Ed.
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 Ed
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1/8/2004 7:02:26 PM
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frank wrote:
> I thought that \s was for whitespace, but the following does not seem to
> work. What am I missing?
>
> s/^ \*\s*defin/ * Defin/I
>
> I'm trying to fix the following comment block in some code. I want to force
> two spaces between the asterisk and the initial "d", as well as convert the
> "d" to uppercase. The spacing could be a combination of spaces or tabs (ie.
> whitespace). The word "defining" could also be "define".
>
> * defining buffer lengths
>
sed doesn't understand the \(letter) codes in regular expressions.
Use perl instead.
Chris Mattern
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Chris
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1/8/2004 8:35:07 PM
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2 Replies
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