I have a flat file example is below. I need to parse through the flat file looking for the numbers ranging from 4000 to 6200 and count up how many times it finds each of them and output the results to another file. So how many times did it fine 4001 or 4348 or 5774? Each line in the file will look like the following, I only want to count the ones that have the bn infront of the 4 digit number, and I don't want to count the digits if they happen to match after the word bytes. 
Data Example:
base1,Thu 21Dec06 08:00:02 ,62bn6085, bytes 608584
base1,Thu 21Dec06 08:00:07 ,63bn5600, bytes 77383
base2,Thu 21Dec06 08:00:18 ,65bn6085, bytes 88373
base5,Thu 21Dec06 08:00:19 ,66bn6042, bytes 388377
base4,Thu 21Dec06 08:03:44 ,81bn4370, bytes 8956003
base6,Thu 21Dec06 08:03:57 ,82bn4512, bytes 7783
base3,Thu 21Dec06 08:01:03 ,06bn5600, bytes 77383

Output Would be:
6085 - 2
5600 - 2
6042 - 1
4270 - 1
4512 - 1
.....
And if it did not find any #### - 0

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What would be the best and most efficient way to do this, the file I will be parsing is rather large. Thanks, Ad.

In reply to Parsing a Flat File and counting occurances of numbers? by batcater98

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