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Date period overlapping scenarios



Here is the code that does the magic:


var isOverlapping = ((A == null || D == null || A <= D) && (C == null || B == null || C <= B) && (A == null || B == null || A <= B) && (C == null || D == null || C <= D));


Where..


A -> 1Start


B -> 1End


C -> 2Start


D -> 2End


Proof? Check out this test console code gist.


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