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Splitting a string into chunks of a certain size
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INSERT IF NOT EXISTS ELSE UPDATE?
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Is ServiceLocator an anti-pattern?
...onstructor injection). And the problem will be still there.
There are two more serious problems:
With service location you are also adding another dependency: The service locator.
How do you tell which lifetime the dependencies should have, and how/when they should get cleaned up?
With construct...
Textarea onchange detection
...re: could be typing or deleting, and could have text selected meaning it's more than just +/- 1).
– brianmearns
Apr 26 '12 at 15:24
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When to use lambda, when to use Proc.new?
...e proc itself
In a Proc.new-created proc, the return statement is a little more surprising: it returns control not just from the proc, but also from the method enclosing the proc!
Here's lambda-created proc's return in action. It behaves in a way that you probably expect:
def whowouldwin
mylam...
Is there a Java equivalent to C#'s 'yield' keyword?
... and disadvantages. It's likely Aviad's solution is faster, while Jim's is more portable (for example, I don't think Aviad's library will work on Android).
Interface
Aviad's library has a cleaner interface - here's an example:
Iterable<Integer> it = new Yielder<Integer>() {
@Overr...
How to retrieve a single file from a specific revision in Git?
...oot of the repository, not your current directory position.
(Although Mike Morearty mentions that, at least with git 1.7.5.4, you can specify a relative path by putting "./" at the beginning of the path. For example:
git show HEAD^^:./test.py
)
Using git restore
With Git 2.23+ (August 2019), you ca...
How to return an empty ActiveRecord relation?
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Value Change Listener to JTextField
...ntioned in Jean-Marc Astesana's answer, where the document sometimes fires more events than it needs to.
Anyway, this method lets you replace annoying code which looks like this:
someTextBox.getDocument().addDocumentListener(new DocumentListener() {
@Override
public void insertUpdate(Docum...
Is the “struct hack” technically undefined behavior?
...ous pointer arithmetic could then be made to trap - see e.g. CCured. On a more philosophical level, it doesn't matter whether no possible implementation could catch you, it's still undefined behavior (there are, iirc, cases of undefined behavior that would require an oracle for the Halting Problem ...