Re: Post-grep-like operations

I always use the following approach in this situation, even
though better sedders than me don't seem to like it. It
uses the t and b branch commands following a subsitution. I
like it because it is simple and works well with a negative
or a postive match, and, I don't have to fuss trying to
use the special character "!" in a script or on the commandline.

eg.

s/fruit/fruit/
t fruit
s/veg/veg/
t veg
b
:fruit
Put your subsitution command here
b
: veg
Put your subsitution command here


On Sat, Dec 10, 2005 at 04:31:20PM +0000, Rob Simpson wrote:
> 
> I am wanting to select lines containing 'fruit' or 'veg', and then carry out 
> some operation on them, say substitution X for a.
> 
> Eg.
> 
> fruit banana
> fruit fly
> meat beef
> veg carrot
> 
> to
> 
> fruit bXnXnX
> fruit fly
> veg cXrrot
> 
> I am trying to do this in a sed file:
> 
> /fruit/b
> /veg/b
> d
> s/a/X/g
> 
> using the grep like command in the one-liners document.
> 
> The last expression doesn't get carried out.  I guess something is happening 
> with the buffer, but do not understand what. I can't find '/b' in the 
> documentation.
> 
> I am trying to avoid having to do multiple passes of the data, but maybe I 
> can't.
> 
> Any help much appreciated,
> 
> Rob
> 
> 
> 
> 
> 
> -- 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 


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