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Can a foreign key be NULL and/or duplicate?

... 46 From the horse's mouth: Foreign keys allow key values that are all NULL, even if there are ...
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Unloading classes in java?

... answered Sep 29 '08 at 13:46 Mario OrtegónMario Ortegón 17.5k1717 gold badges6767 silver badges7979 bronze badges ...
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C# switch statement limitations - why?

...| edited May 23 '17 at 11:46 Community♦ 111 silver badge answered Sep 4 '08 at 22:51 ...
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Get Android .apk file VersionName or VersionCode WITHOUT installing apk

... 46 If you are using version 2.2 and above of Android Studio then in Android Studio use Build → ...
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Git in Visual Studio - add existing project?

...rom now on. – MrCC Jun 20 '15 at 18:46 If you would like to chose the Project this new solution goes into, you can cli...
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Is functional GUI programming possible? [closed]

... 46 I 100% agree with this. To make it crystal clear: the reason why existing GUI toolkits are often used is because they exist. The reason why...
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Permutations in JavaScript?

...r. – Anderson Green Feb 13 '14 at 2:46 17 Accessing globals in your function, bad form! ...
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Detect iPad Mini in HTML5

...t. – JiminyCricket Nov 14 '12 at 10:46 9 -1: I hate pages that ask me questions when I visit them...
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How to display a confirmation dialog when clicking an link?

... kapakapa 70.4k1818 gold badges146146 silver badges171171 bronze badges ...
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What exactly does big Ө notation represent?

...time. – Will Sewell Feb 21 '13 at 9:46 1 @almel It's 2*n (2n, two times n) not 2^n ...