Hello,

for the life of me I can't figure this out. Say I have the following @array: 

order_id, time_mins
096000BN, 32
096000BP, 85
096000BG, 132
096000Be, 85
096000BP, 32

[download]
& etc.......

I would like to perform a match on array value at position 0 i.e.: $array[$i][0] and if the match found find a difference between values in corresponding position 1. So basically, I want to find a match for values in column order_id and if there is a match calculate the difference in time_mins.

Should I use hash for this? The number of lines in array is extremely large. Thanks for your help!!!

In reply to Comparing elements of array... by angelfish

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