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Answers and rating deltas for

Is there a nice simple way to check if a variable in Javascript has a value?

Author Votes Δ
jfriend00 4 +0.88
Kenaniah 2 +1.81
John Fisher 1 -0.01
kennebec 0 -0.73
Boundless 0 -2.95
Last visited: Sep 14, 2014, 5:07:29 AM