----- Original Message -----
From: "Alex Schuster" <wo...@wonkology.org>
To: <gentoo-user@lists.gentoo.org>
Sent: Tuesday, August 11, 2009 4:59 AM
Subject: Re: [gentoo-user] Bash script inquiry
Richard Marza writes:
FILE=`cat filename.txt`
TICK=`cat filename.txt | wc -l'
TOCK="0"
while [ $TICK != $TOCK ] ; do
let $TOCK=$TOCK+1
Or, simpler, as we are using bash: (( TOCK++ ))
Var1= `cat FirstWordOfFirstColumnOfFirstLine` (This I
actually achieved with sed and awk)
Var2=`cat FirstFloatOfFirstLine` (The problem lies here;
it's my inability to come up with a way of implementing a variable that
changes along with the counter. so that the second time this is run it
doesn't do the first line but moved to the second line and the third line
and so on...)
done
exit 0
What should Var1 contain - "Dbase1" or the content of the file "Dbase1"?
What should Var2 contain - "5.0" or the content of the file "5.0"?
Because you are using cat in the assignment.
If you just need the values in a variable, do it like this:
file=filename.txt
Var1=( $( cat "$file" | awk '{ print $1 }' ) ) # creates an array variable
Var2=( $( cat "$file" | awk '{ print $2 }' ) )
The $() notation does the same as backticks, but is more readable. Using
foo=( ... ) will create foo as an array. I assume there is no whitespace
in
your data, that is Var1 will never contain something like "Dbase 1".
${#va...@]} will contain the number of elements (your $TICK). To access
the
5th element (for example), use ${Var1[4]}.
Oh, an please don't hijack threads by replying to an existing one, but
start
a new one. This one appears inside the "Cloning movie DVDs" thread.
And feel free to ask more questions, maybe I got it all wrong.
Wonko
I did not intend to hijack. Next time I will be more cautious. Your
information is useful. I have used awk. The array is very useful here.
Think of the file I'm using as a spreadsheet. The headers(column names) are
on top and the values are below them. Each line has an item with multiple
values under different systems.
Item System1 System3 System4 ...
nio 5.0 5.5 5.0 (these are individual
values. They are nothing more than what they represent. The item (nio) and
the float or integer representing its value under the different
system...It's just a file)
My goal is to take "nio" and figure out which system has a different price
than the others. So if the script were to run through 200 lines of similar
text it should definitely kick-out: "nio has discrepancy in System3; price
5.5 in line 1"
Another thing, all systems can have different prices. This must also kick
out. This is really a script to report discrepancies.
