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Difference between 3NF and BCNF in simple terms (must be able to explain to an 8-year old)

...rella meat 2 sausage cheese 2 peppers vegetable Wait a second, mozzarella can't be both a cheese and a meat! And sausage isn't a cheese! We need to prevent these sorts of mistakes, to make mozzarella always be cheese. We should use a separate table for this, so we write d...
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How can I print the contents of a hash in Perl?

...follow | edited Nov 3 '12 at 11:25 hippietrail 13k1414 gold badges8484 silver badges125125 bronze badges ...
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How can I remove a button or make it invisible in Android?

How can I remove a button in Android, or make it invisible? 14 Answers 14 ...
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Get HTML5 localStorage keys

... for (var key in localStorage){ console.log(key) } EDIT: this answer is getting a lot of upvotes, so I guess it's a common question. I feel like I owe it to anyone who might stumble on my answer and think that it's "right" just because it was accepted to make an update. Truth i...
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Compile time string hashing

I have read in few different places that using C++11's new string literals it might be possible to compute a string's hash at compile time. However, no one seems to be ready to come out and say that it will be possible or how it would be done. ...
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How to print out all the elements of a List in Java?

I am trying to print out all the elements of a List , however it is printing the pointer of the Object rather than the value. ...
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How to lazy load images in ListView in Android

I am using a ListView to display some images and captions associated with those images. I am getting the images from the Internet. Is there a way to lazy load images so while the text displays, the UI is not blocked and images are displayed as they are downloaded? ...
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Postgres unique constraint vs index

As I can understand documentation the following definitions are equivalent: 8 Answers ...
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UICollectionView's cellForItemAtIndexPath is not being called

Only my second time using UICollectionView's and perhaps I have bitten off more than I can chew but nevertheless: 31 Answer...
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Split long commands in multiple lines through Windows batch file

How can I split long commands over multiple lines in a batch file? 5 Answers 5 ...