Why cant i delete blank lines?


 
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# 1  
Old 12-08-2008
Why cant i delete blank lines?

I have a sed pipeline:

Code:
myVar=$(cat $FILE | sed -n '/regex/,/regex/{/regex/d;p}' | sed -n '/regex/!p' | sed -e s/[^:]*:// | sed /regex/,+8d \
 )

sed '/^$/d'
sed '/./!d'

And i've tried to add that in a different order rather then just on the end..Why isnt it deleting all the blank lines? Btw, my file really didnt have very much blank lines to begin with..
# 2  
Old 12-09-2008
sed '/^ *$/d'

With or w/o spaces it really just doesnt want to.
# 3  
Old 12-09-2008
You should not pipe one sed into the next. Put all your sed statements together into one script.

Your blank lines might consist of non-printing characters, maybe spaces and/or tabs.

To find out you could display the file using "od -ax" and have a look at the hex codes of your characters.

If it is only tabs and blanks (aka "whitespace") then use the following expression (replace "<b>" with a blank and "<tab>" with a literal tab char):

Code:
sed '/^[<b><tab>]*$/d'

I hope this helps.

bakunin
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