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Answers and rating deltas for

If I use delete in Javascript, what is the difference in var x, and simple x declaration?

Author Votes Δ
Fenton 8 +1.66
Joe 7 +0.80
antoinestv 0 -1.56
Dhaval Marthak 0 -1.24
Alex 0 -0.65
Last visited: Jan 2, 2016, 5:41:52 PM