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How do you effectively model inheritance in a database?
...s has its own table. The base class has all the base class elements in it, and each class which derives from it has its own table, with a primary key which is also a foreign key to the base class table; the derived table's class contains only the different elements.
So for example:
class Person {
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How does this giant regex work?
...e nicely done. Basically, it lists all the files in the current directory, and it lets you change directories.
4 Answers
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The executable gets signed with invalid entitlements in Xcode
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I grappled with this issue for an hour, and finally found a fix. Turned out the Development Team was different in ProjectTarget and ProjectTests.
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TaifunWiFi 拓展：WiFi Manager WiFi管理器扩展 · App Inventor 2 中文网
... 4. 企业网络管理
技术说明
权限要求
Android版本兼容性
网络扫描限制
网络建议API（Android >= 10）
最佳实践
故障排除
常见问题
开发信息
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TaifunWiFi 拓...
How to “properly” print a list?
... '.join(map(str, mylist))
In Python 3 (where print is a builtin function and not a syntax feature anymore):
mylist = ['x', 3, 'b']
print('[%s]' % ', '.join(map(str, mylist)))
Both return:
[x, 3, b]
This is using the map() function to call str for each element of mylist, creating a new list o...
When to use nested classes and classes nested in modules?
I'm pretty familiar with when to use subclasses and modules, but more recently I've been seeing nested classes like this:
5...
What is exactly the base pointer and stack pointer? To what do they point?
...bp is usually set to esp at the start of the function. Function parameters and local variables are accessed by adding and subtracting, respectively, a constant offset from ebp. All x86 calling conventions define ebp as being preserved across function calls. ebp itself actually points to the previo...
Markdown open a new window link [duplicate]
I'm trying to edit a website which uses a modx cms, and it's using Markdown. Now I would like to open a new link into another window.
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EProgrammerNotFound exception in Delphi?
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It is just the result of a long day and we had gotten a little giddy. For many, many years (ever since I'd been on the team), we'd always joked about replacing some error message in the compiler for one of the most common errors with a similar message. Internal...
Javascript set img src
... a dynamically generated page. So the obvious thing to do is to preload it and use that one variable as the source all the time.
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