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How do you effectively model inheritance in a database?
...nd up with this table:
table Person
------------
int id (PK)
int rowtype (0 = "Person", 1 = "Employee")
string firstname
string lastname
datetime startdate
For any rows which are rowtype 0 (Person), the startdate will always be null.
Table-Per-Concrete (TPC)
Each class has its own fully formed ...
How to get the current branch name in Git?
...
answered Jun 5 '11 at 20:17
roberttdevroberttdev
27.7k22 gold badges1717 silver badges2323 bronze badges
...
What does collation mean?
...
60
Collation can be simply thought of as sort order.
In English (and it's strange cousin, American...
How to “properly” create a custom object in JavaScript?
...ery such assignment:
setTimeout(function() {
mycircle.move(1, 1);
}, 1000);
or, in the future (or now if you hack Function.prototype) you can also do it with function.bind():
setTimeout(mycircle.move.bind(mycircle, 1, 1), 1000);
if your instances are done the closure way, the binding is do...
Shell script - remove first and last quote (") from a variable
...
302
Use tr to delete ":
echo "$opt" | tr -d '"'
Note: This removes all double quotes, not just ...
When should I use C++ private inheritance?
... |
edited May 23 '17 at 10:31
Community♦
111 silver badge
answered Mar 18 '09 at 0:18
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SVN: Folder already under version control but not comitting?
...|
edited May 23 '17 at 12:03
Community♦
111 silver badge
answered Feb 8 '11 at 22:09
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Apache .htaccess 禁止访问某目录方法 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...1、错误文档的定位
常见的客户端请求错误返回代码：
401 Authorization Required
403 Forbidden
404 Not Found
405 Method Not Allowed
408 Request Timed Out
411 Content Length Required
412 Precondition Failed
413 Request Entity Too Long
414 Request URI Too Long
415 Unsuppor...
Java enum - why use toString instead of name
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202
It really depends on what you want to do with the returned value:
If you need to get the exac...
Can HTML checkboxes be set to readonly?
...
560
you can use this:
<input type="checkbox" onclick="return false;"/>
This works because r...