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Full Discussion: reading data from a file to an array
Top Forums Shell Programming and Scripting reading data from a file to an array Post 302702835 by kshji on Wednesday 19th of September 2012 01:11:03 AM
Old 09-19-2012
Here is some array using example.
=> for you is enough:
Code:
whle read line
do
     array=($line)
     ...
done

Array examples:
Code:
#!/some/shell     (=ksh, bash, ...)
#arrays
mytable=(a1 b2 c3)
echo ${#mytable[*]}
echo ${mytable[*]}

# save cmdline args
myargs=("$@")
echo "0:${myargs[0]}"
echo "1:${myargs[1]}"

# from file
cat <<EOF > $0.tmp
123 456 444
222 444 555
EOF

values=( $(<$0.tmp) )
echo "file in"
echo "0:${values[0]}"
echo "1:${values[1]}"
# from file, delimiter ;
cat <<EOF > $0.tmp
123;456;444
222;444;555
EOF

echo "csv"
oifs="$IFS"
IFS=";"
values=( $(<$0.tmp) )
IFS="$oifs"
echo "0:${values[0]}"
echo "1:${values[1]}"

# cmd output
echo "time"
values=( $(date '+%H %M %S') )
echo "0h:${values[0]}"
echo "1m:${values[1]}"
echo "2s:${values[2]}"

 

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LEARN ABOUT OSX

io::lines5.12

IO::Lines(3)						User Contributed Perl Documentation					      IO::Lines(3)

NAME

       IO::Lines - IO:: interface for reading/writing an array of lines

SYNOPSIS

	   use IO::Lines;

	   ### See IO::ScalarArray for details

DESCRIPTION

       This class implements objects which behave just like FileHandle (or IO::Handle) objects, except that you may use them to write to (or read
       from) an array of lines.  They can be tiehandle'd as well.

       This is a subclass of IO::ScalarArray in which the underlying array has its data stored in a line-oriented-format: that is, every element
       ends in a "
", with the possible exception of the final element.  This makes "getline()" much more efficient; if you plan to do line-
       oriented reading/printing, you want this class.

       The "print()" method will enforce this rule, so you can print arbitrary data to the line-array: it will break the data at newlines
       appropriately.

       See IO::ScalarArray for full usage and warnings.

VERSION

       $Id: Lines.pm,v 1.3 2005/02/10 21:21:53 dfs Exp $

AUTHORS

   Primary Maintainer
       David F. Skoll (dfs@roaringpenguin.com).

   Principal author
       Eryq (eryq@zeegee.com).	President, ZeeGee Software Inc (http://www.zeegee.com).

   Other contributors
       Thanks to the following individuals for their invaluable contributions (if I've forgotten or misspelled your name, please email me!):

       Morris M. Siegel, for his $/ patch and the new "getlines()".

       Doug Wilson, for the IO::Handle inheritance and automatic tie-ing.

perl v5.12.5							    2005-02-10							      IO::Lines(3)
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