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Single quotes and double quotes


 
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# 1  
Old 09-16-2009
CPU & Memory Single quotes and double quotes

Hi guys, I have a sed line in double quotes which works fine, but I want it to be in single quotes

here is the sed line

Code:
 
sed "/abc_def/s/\'.*\'/\'\${abc_def}\'/"

can some one give the equivalent to the above script in single quotes

Thanks a ton
# 2  
Old 09-16-2009
Please provide a definitive example of a before string and an after string. The backslash before the dollar sign makes the purpose of this script ambiguous.

Last edited by methyl; 09-16-2009 at 10:16 PM..
# 3  
Old 09-16-2009
Code:
 
 
sed "/abc_def/s/\'.*\'/\'\${abc_def}\'/" < /*<abc_def>*/'1'
 
output should be
 
/*<abc_def>*/'${abc_def}'

# 4  
Old 09-16-2009
Please provide a definitive example of a before string and an after string.
# 5  
Old 09-16-2009
input file: abc.sql

Code:
select

/*<abc_def>*/'1' AS abc_def

from

dbc.new_db


Code:
sed "/abc_def/s/\'.*\'/\'\${abc_def}\'/" < abc.sql


output should be:

Code:
 
select

/*<abc_def>*/'${abc_def}' AS abc_def

from

dbc.new_db


Last edited by sol_nov; 09-16-2009 at 10:37 PM..
# 6  
Old 09-16-2009
PHEW!!!! here you go..
Code:
sed '/abc_def/s/'\''.*'\''/'\''\${abc_def}'\''/' filename

Enclosing characters in single quotes preserves the literal value of each character within the quotes. A single quote may not occur between single quotes, even when preceded by a backslash.
Therefore, you need to terminate the quoted expression, insert the escaped quote, and start a new quoted expression. The shell's quote removal does not add any extra spaces, so in effect you get string concatenation.

Last edited by vidyadhar85; 09-16-2009 at 10:53 PM..

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