Using sed to delete everything after "space"


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# 1  
Using sed to delete everything after "space"

Hi,

I have a lot of string texts which normally should only contain a single float so that I can put this float into a variable.
This stings are generated by a grep command out of a large html file.
sometimes a value that I want to grep is found more than once, so that the resulting sting contains the value more than once, too.
Example:
"14.5 14.5"
So my idea was to use the sed command to delete everything after the first found " ". But I am not able to set the parameters for that sed command right.
I hope someone can help me with that...

Thanks,
Stefan

---------- Post updated at 01:14 PM ---------- Previous update was at 01:03 PM ----------

never mind. The Secound after I wrote my question I found the Answer myself:
Code:
sed 's/\s.$//'


Last edited by rbatte1; 01-12-2018 at 09:49 AM.. Reason: Added CODE tags
# 2  
You certainly meant .* not .$ ?
Further, \s is standard in perl (PCRE). And came into the GNU RE but is not a standard in an RE (not portable to a non-GNU sed).
The standard wants a character class
Code:
sed 's/[[:blank:]].*//'

Last but not least you ask to delete everything *after* a space, that would be
Code:
sed 's/\([[:blank:]]\).*/\1/'

The matching blank is marked in a \( \) group, and the \1 restores it.
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