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Best practices/performance: mixing StringBuilder.append with String.concat
...t practice is and why for concatenating string literals and variables for different cases. For instance, if I have code like this
...
Does deleting a branch in git remove it from the history?
...mmits in git. In git each commit has a complete source tree, it is a very different structure from svn where all branches and tags (by convention) live in separate 'folders' of the repository alongside the special 'trunk'.
If the branch was merged into another branch before it was deleted then all ...
Submitting a form by pressing enter without a submit button
...er but not displaying a submit button. I don't want to get into JavaScript if possible since I want everything to work on all browsers (the only JS way I know is with events).
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How are Anonymous inner classes used in Java?
...method that returns the first number larger than i in the given list, or i if no number is larger:
public static int larger(final List<Integer> ns, final int i) {
for (Integer n : ns)
if (n > i)
return n;
return i;
}
And then you have another method that returns the firs...
How can I get System variable value in Java?
...
To clarify, system variables are the same as environment variables. User environment variables are set per user and are different whenever a different user logs in. System wide environment variables are the same no matter what user ...
Is there an ExecutorService that uses the current thread?
...oreExecutors.newDirectExecutorService(), or MoreExecutors.directExecutor() if you don't need an ExecutorService.
If including Guava is too heavy-weight, you can implement something almost as good:
public final class SameThreadExecutorService extends ThreadPoolExecutor {
private final CountDownLa...
Java 8 NullPointerException in Collectors.toMap
The Java 8 Collectors.toMap throws a NullPointerException if one of the values is 'null'. I don't understand this behaviour, maps can contain null pointers as value without any problems. Is there a good reason why values cannot be null for Collectors.toMap ?
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JavaScript string newline character?
... the universal newline character sequence in Javascript for all platforms? If not, how do I determine the character for the current environment?
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Selectors in Objective-C?
... class of type 'SEL' and then run methods such as respondToSelector to see if the receiver implements that method. Can someone offer up a better explanation?
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Best Practices for securing a REST API / web service [closed]
...lly a bad thing. Basic is preferable to Digest when using SSL because even if the caller already knows that credentials are required, Digest requires an extra roundtrip to exchange the nonce value. With Basic, the callers simply sends the credentials the first time.
Once the identity of the client ...