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How do you get the width and height of a multi-dimensional array?
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Reed CopseyReed Copsey
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How many characters can UTF-8 encode?
...ode. This covers the remainder of almost all Latin alphabets, and also Greek, Cyrillic, Coptic, Armenian, Hebrew, Arabic, Syriac and Tāna alphabets, as well as Combining Diacritical Marks.
Three bytes are needed for characters in the rest of the Basic Multilingual Plane, which contains virtual...
Why not inherit from List?
When planning out my programs, I often start with a chain of thought like so:
27 Answers
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Java HashMap performance optimization / alternative
... million distinct objects. That is an average of 1,300 objects per hash bucket = very very bad. However if I turn the two arrays into a number in base 52 I am guaranteed to get a unique hash code for every object:
public int hashCode() {
// assume that both a and b are sorted
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Practical uses for AtomicInteger
...pports compare-and-swap instruction (compareAndSet()) to implement non-blocking algorithms.
Here is an example of non-blocking random number generator from Brian Göetz's Java Concurrency In Practice:
public class AtomicPseudoRandom extends PseudoRandom {
private AtomicInteger seed;
Atomi...
Getting the first character of a string with $str[0]
...ant to get the first letter of a string and I've noticed that $str[0] works great. I am just not sure whether this is 'good practice', as that notation is generally used with arrays. This feature doesn't seem to be very well documented so I'm turning to you guys to tell me if it's all right – in...
How to create and write to a txt file using VBA
...are repetitive in that file, only the hex values are changing, I want to make it a tool generated file.
5 Answers
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Invert “if” statement to reduce nesting
...d is not necessarily bad. It might be better to return immediately if it makes the intent of the code clearer. For example:
double getPayAmount() {
double result;
if (_isDead) result = deadAmount();
else {
if (_isSeparated) result = separatedAmount();
else {
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Outputting data from unit test in python
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Very late answer for someone that, like me, comes here looking for a simple and quick answer.
In Python 2.7 you could use an additional parameter msg to add information to the error message like this:
self.assertEqual(f.bar(t2), 2, msg='{0}, {1}'.format(t1, t2...
Are inline virtual functions really a non-sense?
...e only time an inline virtual call
can be inlined is when the compiler
knows the "exact class" of the object
which is the target of the virtual
function call. This can happen only
when the compiler has an actual object
rather than a pointer or reference to
an object. I.e., either with ...