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Why use multiple columns as primary keys (composite primary key)
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Your understanding is correct.
You would do this in many cases. One example is in a relationship like OrderHeader and OrderDetail. The PK in OrderHeader might be OrderNumber. The PK in OrderDetail might be OrderNumber AND LineNumber. ...
Who is calling the Java Thread interrupt() method if I'm not?
I've read and re-read Java Concurrency in Practice, I've read several threads here on the subject, I've read the IBM article Dealing with InterruptedException and yet there's something I'm simply not grasping which I think can be broken down into two questions:
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iOS 8 removed “minimal-ui” viewport property, are there other “soft fullscreen” solutions?
...mal-ui with a "touch-drag down" gesture.
There are several pre-conditions and obstacles to manage the view state, e.g. for minimal-ui to work, there has to be enough content to enable user to scroll; for minimal-ui to persist, window scroll must be offset on page load and after orientation change. ...
What is the intent of the methods getItem and getItemId in the Android class BaseAdapter?
I'm curious about the purpose of the methods getItem and getItemId in the class Adapter in the Android SDK.
6 Answers
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How to prevent a background process from being stopped after closing SSH client in Linux
...ought I could do that by starting the process in background (with an ampersand at the end of the command) and redirecting stdout to a file.
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Pretty git branch graphs
I've seen some books and articles have some really pretty looking graphs of git branches and commits. How can I make high-quality printable images of git history?
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Change name of iPhone app in Xcode 4
... which is displayed below the app icon on the iPhone screen.
I use Xcode 4 and I have one target with keys:
11 Answers
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What does 'super' do in Python?
...tends yours. If somebody later wanted to write a class that extended Child and a mixin, their code would not work properly.
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How can I distribute python programs?
...th distutils. It's made both for distributing library type python modules, and python applications, although I don't know how it works on Windows. You would on Windows have to install Python separately if you use distutils, in any case.
I'd probably recommend that you distribute it with disutils fo...
What is the difference between bool and Boolean types in C#
What is the difference between bool and Boolean types in C#?
14 Answers
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