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Unique constraint on multiple columns
...e resuting table definition would be:
CREATE TABLE [dbo].[user](
[userID] [int] IDENTITY(1,1) NOT NULL,
[fcode] [int] NULL,
[scode] [int] NULL,
[dcode] [int] NULL,
[name] [nvarchar](50) NULL,
[address] [nvarchar](50) NULL,
CONSTRAINT [PK_user_1] PRIMARY KEY CLUSTERED
...
How to delete an app from iTunesConnect / App Store Connect
...an be edited and thus reused for a new app, including the app name, Bundle ID, icon, etc etc. Because SKU can be anything (some people say they use numbers 1, 2, 3 for example) then it shouldn't be a big deal to use something unrelated for your new app.
(Honestly though I'm hoping Apple will fix th...
Difference between java.lang.RuntimeException and java.lang.Exception
...enerally RuntimeExceptions are exceptions that can be prevented programmatically. E.g NullPointerException, ArrayIndexOutOfBoundException. If you check for null before calling any method, NullPointerException would never occur. Similarly ArrayIndexOutOfBoundException would never occur if you check ...
Task vs Thread differences [duplicate]
...k returned by WebClient.DownloadStringTaskAsync won't take much CPU time locally; it's representing a result which is likely to spend most of its time in network latency or remote work (at the web server)
A task returned by Task.Run() really is saying "I want you to execute this code separately"; th...
What should main() return in C and C++?
...urn 0.
Finally, there is nothing wrong from a standards point of view with calling main() recursively from a C program.
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Implement C# Generic Timeout
...s example, for your enjoyment. The method you are really interested in is CallWithTimeout. This will cancel the long running thread by aborting it, and swallowing the ThreadAbortException:
Usage:
class Program
{
static void Main(string[] args)
{
//try the five second method with...
Difference between Divide and Conquer Algo and Dynamic Programming
...
sometimes when programming recursivly, you call the function with the same parameters multiple times which is unnecassary.
The famous example Fibonacci numbers:
index: 1,2,3,4,5,6...
Fibonacci number: 1,1,2,3,5,8...
function F(n) {
if (n < 3)
...
When is TCP option SO_LINGER (0) required?
...ion sequence looks like this (simplified):
We have two peers: A and B
A calls close()
A sends FIN to B
A goes into FIN_WAIT_1 state
B receives FIN
B sends ACK to A
B goes into CLOSE_WAIT state
A receives ACK
A goes into FIN_WAIT_2 state
B calls close()
B sends FIN to A
B goes into LAST_ACK...
Delete file from internal storage
...
The getFilesDir() somehow didn't work.
Using a method, which returns the entire path and filename gave the desired result. Here is the code:
File file = new File(inputHandle.getImgPath(id));
boolean deleted = file.delete();
...
How do I combine two data frames?
... steps —
Step 1: Set index of the first dataframe (df1)
df1.set_index('id')
Step 2: Set index of the second dataframe (df2)
df2.set_index('id')
and finally update the dataframe using the following snippet —
df1.update(df2)
...