I have a file in which I need to add more columns to based on a key in the first file:
File1
File2
I would like to create the following output:
Output
I'm trying to program this in Perl. My first thought is the following:
1. Fill an array with the keys in file1
2. open file2 and loop through the array on each row until i get a match then put the columns I want into a Hash of Arrays
3. Go back to the first file and apply the columns that i need to the end of the file.
However, the data sets that I'm working with are extremely big, and time is definitely an issue. Also, I think that my logic above is not the best way of doing it.
Hello,
I am very now to this, hope you can help,
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