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Concurrent vs serial queues in GCD
... running in background thread")
}
let imgURL = URL(string: "https://upload.wikimedia.org/wikipedia/commons/0/07/Huge_ball_at_Vilnius_center.jpg")!
let _ = try! Data(contentsOf: imgURL)
print("\(i) completed downloading")
}
}
}
Task wil...
Best Timer for using in a Windows service
... Console.WriteLine("{0} Creating timer.\n",
DateTime.Now.ToString("h:mm:ss.fff"));
Timer stateTimer =
new Timer(timerDelegate, autoEvent, 1000, 250);
// When autoEvent signals, change the period to every
// 1/2 second.
autoEvent.Wait...
Entity Attribute Value Database vs. strict Relational Model Ecommerce
... @Zim, that sounds pretty much like option 3. Each row has 1-n extra "generic" columns, and the data stored in them is interpreted at the application level. You get the performance benefit of having all the data for one record in one place. The metadata about those columns needs to be st...
Python: using a recursive algorithm as a generator
...
def getPermutations(string, prefix=""):
if len(string) == 1:
yield prefix + string
else:
for i in xrange(len(string)):
for perm in getPermutations(string[:i] + string[i+1:], prefix+string[i]):
...
How to compare arrays in JavaScript?
...als([1, 2, 1, 2]) === true;
You may say "But it is much faster to compare strings - no loops..." well, then you should note there ARE loops. First recursive loop that converts Array to string and second, that compares two strings. So this method is faster than use of string.
I believe that larger a...
Format a datetime into a string with milliseconds
I want to have a datetime string from the date with milliseconds. This code is typical for me and I'm eager to learn how to shorten it.
...
How to get an enum value from a string value in Java?
...far, should I understand that it's good practice to define an enum and its String value to be exactly the same?
– Kevin Meredith
Feb 12 '14 at 21:24
...
How can I echo HTML in PHP?
...
@MhdSyrwan just random chars, you can read more here php.net/manual/en/…
– lfx
Sep 23 '11 at 18:22
1
...
Why do loggers recommend using a logger per class?
...
{
class log
{
public static async void Log(int severity, string message)
{
await Task.Run(() => LogIt(severity, message));
}
private static void LogIt(int severity, string message)
{
StackTrace st = new StackTrace();
...
python: How do I know what type of exception occurred?
...
If you want to store the traceback as a string, you can use traceback.format_exc() as well
– Stevoisiak
Jun 1 '18 at 15:18
...