Hello Monks,
I have two arrays
@ar_1
@ar_2
@ar_1 is the list of users and @ar_2 is the list of places visited by each user.Now each user has places visited in common like in @ar_2 cosists of {boston,Ny,Delhi,Paris,boston,cicago,Ny} etc.
You see the repetion of cities in @ar_2.This repetion is a value to different user in @ar_1.
My question is for a single key from @ar_1, how will you find the keys for that?