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# Sorting - Help needed

Posted on 2006-11-28
Medium Priority
250 Views
My perl program parses data and outputs the relevant values I need into an array.
(code has a series of ifels conditions I check).

push (@array1,\$var1, ",", \$var2, ",", \$var3, ",", \$var4, ",", \$var5, ",", \$var6,"\n");

The output.csv file contains 6 columns, namely, var1, var2,....var6.
I need to sort my output.csv file first by \$var4 and then by \$var5. I would appreciate if you could:
1) Tell me what are the ways this can be achieved.

2) Code that would do this (with a brief explanation)

0
Question by:nathan_007
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LVL 84

Expert Comment

ID: 18029316
while( <> ){
my (\$var1, \$var2, \$var3, \$var4, \$var5, \$var6) = split/,/;
push @array,"\$var4\0\$var5\0\$var1, \$var2, \$var3,  \$var4, \$var5, \$var6\n";
}
@array = map{/.*\0(.*)/s}sort @array;
print @array;

0

Author Comment

ID: 18031286
Thanks. In most cases \$var4 and \$var5 are 5 digit integers. However I enocuntered an issue when \$var5 happened to be a 4 digit number.

10012, 3068 appeared after 10012, 10078

3068 needs to be as 03068 in the array.

How do I format \$var4 and \$var5 it in the array to be of 5 digits in length.....something similar to sprintf"%05d" ????
0

LVL 5

Expert Comment

ID: 18031423
\$var4 = "0".\$var4 if (length(\$var4)==4);
0

Author Comment

ID: 18031600
Alkali_Guy:
I agree that it works if the length is 4 digits. Is there a generic check I can do and round it to 5 digits assuming \$var5 can be of length 1 or 2 or 3 or 4 or 5.
0

LVL 28

Accepted Solution

FishMonger earned 200 total points
ID: 18032171
\$var5 = sprintf("%05d", \$var5);
0

LVL 84

Assisted Solution

ozo earned 200 total points
ID: 18032196
push @array,sprintf"%6d\0%6d\0%s\n",\$var4,\$var5,"\$var1, \$var2, \$var3,  \$var4, \$var5, \$var6";
0

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