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How to clone ArrayList and also clone its contents?
... obviously, you will have to get your Dog class to implement the Cloneable interface and override the clone() method.
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Measuring text width to be drawn on Canvas ( Android )
... drawn on an Android canvas using the drawText() method according to the Paint used to draw it?
7 Answers
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How to join (merge) data frames (inner, outer, left, right)
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Why do you need to convert CustomerId to numeric? I don't see any mentioning in documentation (for both plyr and dplyr) about this type of restriction. Would your code work incorrectly, if the merge column would be of character type (especially...
Volatile vs Static in Java
...stitute for proper synchronisation!
For instance:
private static volatile int counter = 0;
private void concurrentMethodWrong() {
counter = counter + 5;
//do something
counter = counter - 5;
}
Executing concurrentMethodWrong concurrently many times may lead to a final value of counter diff...
Explanation of JSONB introduced by PostgreSQL
...o a json column postgres doesn't have to actually run the functionality to convert the text to json on every row which will likely save a vast amount of time alone.
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What are allowed characters in cookies?
...Utility to safely encode the cookie value before writing to the cookie and convert it back to its original form on reading it out.
// Encode
HttpUtility.UrlEncode(cookieData);
// Decode
HttpUtility.UrlDecode(encodedCookieData);
This will stop ampersands and equals signs spliting a value into a b...
Using the “final” modifier whenever applicable in Java [closed]
...sibilities that you (or the next programmer, working on your code) will misinterpret or misuse the thought process which resulted in your code. At least it should ring some bells when they now want to change your previously immutable thing.
At first, it kind of looks awkward to see a lot of final k...
How to make ThreadPoolExecutor's submit() method block if it is saturated?
...vate final Semaphore semaphore;
public BoundedExecutor(Executor exec, int bound) {
this.exec = exec;
this.semaphore = new Semaphore(bound);
}
public void submitTask(final Runnable command)
throws InterruptedException, RejectedExecutionException {
sem...
What does “hashable” mean in Python?
I tried searching internet but could not find the meaning of hashable.
9 Answers
9
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Is it possible to make an ASP.NET MVC route based on a subdomain?
... string host = httpContext.Request.Headers["Host"];
int index = host.IndexOf('.');
if (index >= 0)
subdomain = host.Substring(0, index);
}
if (subdomain != null)
routeData.Values["subdomain"] = subdomain;
retur...