Your specification is not entirely clear to me.
in reply to comparing two sets of data
Do you want to check:
- Which keys are different in both files; or
- Which values are different (for corresponding keys); or
- A combination of both.
A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James
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