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Old 07-25-2004, 10:32 AM   #1
cmfarley19
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Bash - Strip Spaces from string then cat


I know this has to be such a simple solution, but I can not figure it out...
I have a string
Code:
GALNAME="Our Family Photos"
I want to create a new string with teh same name except replacing spaces with underscores. I do that with
Code:
GALNAME_NO_SP=`echo "$GALNAME" | tr " " "_"`
That wroks fine. Here's where I'm stuck. I want to create a third string That concatenates the new string with some other info and strings.
Code:
PAGENUMER=1
echo "$GALNAME_NO_SP_page$PAGENUMBER"
I want the to echo "Our_Family_Photos_page1". All it echos is "1". The shell is interpreting "$GALNAME_NO_SP_page" as a variable.
How can I get the shell to interpret $GALNAME_NO_SP as the variable and cat "_page" at the end? If I do
Code:
echo "$GALNAME_NO_SP _page$PAGENUMBER"
then I get "Our_Family_Photos _page1" with a space

Any thoughts?
 
Old 07-25-2004, 10:37 AM   #2
acid_kewpie
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i'd just say do things in a different order:
Code:
echo $GALNAME page$PAGENUMBER | tr ' ' '_'
 
Old 07-25-2004, 10:43 AM   #3
acid_kewpie
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oh you could also quote the vairable.... "$GALNAME"_page... but that should be just for reference now i hope!
 
Old 07-25-2004, 11:06 AM   #4
cmfarley19
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Both are excellent appraches.
It was early here on the US east coast.
Brain was still warming up.

Thanks.
 
Old 07-25-2004, 11:09 AM   #5
jlliagre
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or use this syntax:
${GALNAME_NO_SP}_page$PAGENUMBER"
 
Old 07-25-2004, 11:10 AM   #6
cmfarley19
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Acid_kewpie,
That did it.

Cheers.

Last edited by cmfarley19; 07-25-2004 at 11:12 AM.
 
Old 07-25-2004, 11:12 AM   #7
cmfarley19
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jlliagre,
That will do it too.

Thanks.
 
Old 07-25-2004, 11:15 AM   #8
Hko
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Or:
Code:
echo "${GALNAME_NO_SP}_page$PAGENUMBER"
As "man bash" puts it:
Quote:
${parameter}
The value of parameter is substituted. The braces are required
when parameter is a positional parameter with more than one
digit, or when parameter is followed by a character which is not
to be interpreted as part of its name.
<edit>
Hmm, seems jlliagre types faster than me :-)
</edit>

Last edited by Hko; 07-25-2004 at 11:16 AM.
 
Old 07-25-2004, 01:01 PM   #9
jlliagre
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Well, my answer was less detailed ...
I think it's a draw
 
  


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