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How do you effectively model inheritance in a database?
... public string LastName;
}
class Employee : Person {
public DateTime StartDate;
}
Would result in tables like:
table Person
------------
int id (PK)
string firstname
string lastname
table Employee
--------------
int id (PK, FK)
datetime startdate
Table-Per-Hierarchy (TPH)
There is a sin...
How can I ensure that a division of integers is always rounded up?
...e it one step at a time, and use good engineering principles in doing so.
Start by reading the specification for what you're trying to replace. The specification for integer division clearly states:
The division rounds the result towards zero
The result is zero or positive when the two operands h...
Have a reloadData for a UITableView animate when changing
...
This is useful if the start/end state of your tableview will be very different (and it would be complex to calculate the sections and rows to add/remove), but you wand something less jarring that the non-animated reload.
– Be...
Can someone explain the right way to use SBT?
...and versions to include in your project? Do I just pull out a machette and start hacking my way forward? I quite often find projects that include everything and the kitchen sink
For Scala-based dependencies, I would go with what the authors recommend. For instance: http://code.google.com/p/scalaz/...
How do I make a batch file terminate upon encountering an error?
...hen define a :label.
For example, create this .cmd file:
@echo off
echo Starting very complicated batch file...
ping -invalid-arg || goto :error
echo OH noes, this shouldn't have succeeded.
goto :EOF
:error
echo Failed with error #%errorlevel%.
exit /b %errorlevel%
See also question about exit...
Unable to load DLL (Module could not be found HRESULT: 0x8007007E)
...ch are to be loaded need to be copied into the \bin\debug directory of the start-up project ConsoleApplication1 which is usually a win form, console or web application.
So please be cautious the Current Directory in the accepted answer actually means Current Directory of main executable from where ...
Chrome doesn't delete session cookies
... "Show my windows and tabs from last time" selection for the "When Firefox starts" pulldown in options. For the same reason. By design, session cookies are being retained to help keep workflow in the event of a browser crash.
– webnesto
Sep 5 '12 at 21:11
...
How to make a programme continue to run after log out from ssh? [duplicate]
...out to see the output in real time, and then kill the PID if you need to restart.
– veggiebenz
Apr 30 '18 at 19:32
...
Git says “Warning: Permanently added to the list of known hosts”
...
recently, I faced same issue on my ubuntu machine. It started to behave this way after I used a different (from my default ~/.ssh/id_rsa) key to connect to a server. As @JeremiahGowdy mentioned, I have debug3: load_hostkeys: loading entries for host "172.16.3.101" from file "/de...
Single controller with multiple GET methods in ASP.NET Web API
... Thanks for the helpful answer. I'd like to add that if you start your method names with Get, Post, etc., your requests will map to those methods based on the HTTP verb used. But you can also name your methods anything, and then decorate them with the [HttpGet], [HttpPost], etc. attri...