I have the below script that splits a line on a comma, and adds two new columns in the line by copying column 3 & 4. I need to turn this into a in-place edit one-liner. A regexp seems to be the way to go, but I can't see the solution. Any help appreciated. 


while(<DATA>)
{
    my @array = split(/,/);
    print join(',',@array[0..3]),",$array[3],$array[4],",join(',',@arr
+ay[4..$#array]);
}

__DATA__    
20110_1,1155,30,20110_1_3,0,0,65,0,0,99,20,20,14,0,23,2001-08-01 00:00
+,2001-09-18 00:00,0,,0,
20110_2,1155,30,20110_2_3,0,0,65,0,0,99,20,20,14,0,23,2001-08-01 00:00
+,2001-09-18 00:00,0,,0,
20110_3,1155,30,20110_3_3,0,0,65,0,0,99,20,20,14,0,23,2001-08-01 00:00
+,2001-09-18 00:00,0,,0,

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In reply to Need help constructing a one-liner by nr0mx

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