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How do I count the number of occurrences of a char in a String?
...
My 'idiomatic one-liner' for this is:
int count = StringUtils.countMatches("a.b.c.d", ".");
Why write it yourself when it's already in commons lang?
Spring Framework's oneliner for this is:
int occurance = StringUtils.countOccurrences...
Retrieving the last record in each group - MySQL
...2.name AND m1.id < m2.id)
WHERE m2.id IS NULL;
Regarding performance, one solution or the other can be better, depending on the nature of your data. So you should test both queries and use the one that is better at performance given your database.
For example, I have a copy of the StackOverflo...
How can I create a Makefile for C projects with SRC, OBJ, and BIN subdirectories?
..., you might consider more sophisticated dependency handling; if you modify one of the header files, this makefile will not know which objects/executables must be rebuilt. But that can wait for another day.
EDIT:
Sorry, I omitted part of the $(OBJECTS) rule above; I've corrected it. (I wish I could ...
Resolve build errors due to circular dependency amongst classes
...nker errors in a C++ project due to some bad design decisions (made by someone else :) ) which lead to circular dependencies between C++ classes in different header files (can happen also in the same file) . But fortunately(?) this doesn't happen often enough for me to remember the solution to this...
Best practices: throwing exceptions from properties
...ic to decide where to inject exception catch statements.
As a side note, one should be aware that just because a property is not designed to throw an exception, that doesn't mean it won't; it could easily be calling code that does. Even the simple act of allocating a new object (like a string) cou...
jQuery callback on image load (even when the image is cached)
...hecking and triggering the event based off .complete, like this:
$("img").one("load", function() {
// do stuff
}).each(function() {
if(this.complete) {
$(this).load(); // For jQuery < 3.0
// $(this).trigger('load'); // For jQuery >= 3.0
}
});
Note the change from .bind()...
Executors.newCachedThreadPool() versus Executors.newFixedThreadPool()
... terminates
due to a failure during execution
prior to shutdown, a new one will take
its place if needed to execute
subsequent tasks. The threads in the
pool will exist until it is explicitly
shutdown.
newCachedThreadPool
Creates a thread pool that creates new
threads as needed,...
Using Custom Domains With IIS Express
...t;
</site>
If running MVC: make sure the applicationPool is set to one of the "Integrated" options (like "Clr2IntegratedAppPool").
Open your hosts file and add the line 127.0.0.1 dev.example.com.
► Start your application!
Some great advice from the comments:
You may need to run Visua...
Using Java with Nvidia GPUs (CUDA)
I'm working on a business project that is done in Java, and it needs huge computation power to compute business markets. Simple math, but with huge amount of data.
...
encryption/decryption with multiple keys
...n you think that you might want to be able to read what you've sent to someone and to do so you need to be in the recipients list.
Command line
Here is how to do it through gpg command line (as described in David Segonds' answer):
gpg --encrypt \
--recipient alice@example.com \
--recipient bob@e...