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Problem with variable use

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# 1  
Old 06-23-2009
Problem with variable use
Hi,

I need a little help with variable use:

I have the a file with follow format:

Code:
Type:            Test
Profile:   010


84240 27 15
84900 11 09
84993 55 44
84762 12 12

I need to look the value in the line containing "Profile" and put in front of the lines containing numbers beginning with 84.

Desired output:
Code:
010 84240 27 15
010 84900 11 09
010 84993 55 44
010 84762 12 12

I´ve been trying with:

Code:
awk '/Profile:/ {var=$2} /^84/ {print var " " $0 }}' inputfile

but I get only lines containing the value of "var"

Code:
010
010
010
010

Maybe somebody can help me saying me how to fix this issue.

Thanks in advance
# 2  
Old 06-23-2009
Quote:
Originally Posted by cgkmal
Hi,

I need a little help with variable use:

I have the a file with follow format:

Code:
Type:            Test
Profile:   010


84240 27 15
84900 11 09
84993 55 44
84762 12 12

I need to look the value in the line containing "Profile" and put in front of the lines containing numbers beginning with 84.

Desired output:
Code:
010 84240 27 15
010 84900 11 09
010 84993 55 44
010 84762 12 12

I´ve been trying with:

Code:
awk '/Profile:/ {var=$2} /^84/ {print var " " $0 }}' inputfile

but I get only lines containing the value of "var"

Code:
010
010
010
010

Maybe somebody can help me saying me how to fix this issue.

Thanks in advance
You have an extra braces } at the end...see above in bold .
Remove it and it will work.
# 3  
Old 06-23-2009
SmilieSmilie

ThanksSmilie
# 4  
Old 06-23-2009
Code:
nawk ' $1 == "Profile:" {key=$2;next;}$1 ~ /^84/ {print key" "$0}' yourfile

# 5  
Old 06-23-2009
Hi summer_cherry,

Thanks, it works perfect. A little more help.

But may somebody explain how this works, I undertand a little bit some parts, but not the complete joined sentence.

Code:
 
nawk ' $1 == "Profile:" {key=$2;next;}$1 ~ /^84/ {print key" "$0}' yourfile

When use nawk or awk?

Code:
$1 == "Profile:" {key=$2;next;}$1 --> I undertand that is something like, "if $1 = Profile:, assign key=value in $2"

Code:
 
;next;} --> This part?

Code:
$1 ~ /^84/ --> This part?

Thanks in advance
# 6  
Old 06-24-2009
"next" in awk means "stop processing the current line, and move onto the next line, starting at the top".

Don't confuse "next" with "getline".

"~" (tilde) is for a regular expression comparison, so
Code:
$1 ~ /^84/{do stuff}

means that if the first field starts with 84, then "do stuff"

The gnu awk user's manual (not the man page, but the on-line guide) is a great resource for these types of questions. That's how I learned.
# 7  
Old 06-25-2009
Thanks a lot Gee-Money, I understand much better this. I´ll follow your suggestion.

Smilie
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