sed - remove spaces before 1rst occurence of string


 
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# 1  
Old 01-15-2009
sed - remove spaces before 1rst occurence of string

seems easy but havent found in other posts...

i want to delete any spaces if found before first occurence of ${AI_RUN}


sed 's/ *\\$\\{AI_RUN\\}/\\$\\{AI_RUN\\}/' $HOME/temp1.dat

i think i'm close but can't put my finger on it. Smilie
# 2  
Old 01-15-2009
What's it doing or not doing?
# 3  
Old 01-15-2009
Quote:
Originally Posted by danmauer
seems easy but havent found in other posts...

i want to delete any spaces if found before first occurence of ${AI_RUN}


sed 's/ *\\$\\{AI_RUN\\}/\\$\\{AI_RUN\\}/' $HOME/temp1.dat

i think i'm close but can't put my finger on it. Smilie

Assuming you mean a literal ${AI_RUN}, and not the value of the variable:

Code:
sed 's/ *${AI_RUN}/${AI_RUN}/' "$HOME/temp1.dat"

# 4  
Old 01-15-2009
it made no changes to my file. i still ended up with spaces before the ${AI_RUN}
# 5  
Old 01-15-2009
Hummm thank you muchly...

i thought to search for the literal $ and { i would have to use the escape character \

i'm missing something in my understanding.....

thanks for the clarification...Smilie
# 6  
Old 01-15-2009
Quote:
Originally Posted by danmauer
i thought to search for the literal $ and { i would have to use the escape character \

Inside single quotes, everything is literal.
# 7  
Old 01-15-2009
Thanks again for that clarification. i'll get it straight one day Smilie
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