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Answers and rating deltas for

What is foreach loop exactly doing here...help me to understand it precisely

Author Votes Δ
Tjab 2 +4.00
Franki1986 1 -1.27
Moulika Pinapathruni 1 -1.31
Vineet Desai 1 -1.42
Last visited: Aug 26, 2016, 2:34:25 PM