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Array.Copy vs Buffer.BlockCopy
.... Most of the microbenchmarking code in the posted answers thus far suffer from one or more severe technical flaws, including not moving memory allocations out of the test loops (which introduces severe GC artifacts), not testing variable vs. deterministic execution flows, JIT warmup, and not tracki...
Weird “[]” after Java method signature
...at's a funny Question.
In java you can say int[] a;, as well as int a[];.
From this perspective, in order to get the same result just need to move the [] and write public int[] get() {. Still looks like the code came from an obfuscator...
...
CMake: Project structure with unit tests
...
For questions 1 & 2, I would recommend making a library from your non-test files excluding main.cpp (in this case just src/sqr.cpp and src/sqr.h), and then you can avoid listing (and more importantly re-compiling) all the sources twice.
For question 3, these commands add a test c...
python generator “send” function purpose?
...ite coroutines
def coroutine():
for i in range(1, 10):
print("From generator {}".format((yield i)))
c = coroutine()
c.send(None)
try:
while True:
print("From user {}".format(c.send(1)))
except StopIteration: pass
prints
From generator 1
From user 2
From generator 1
From u...
Best way to represent a fraction in Java?
...inator = denominator.divide(gcd);
}
/**
* Constructs a BigFraction from a whole number.
*/
public BigFraction(BigInteger numerator)
{
this(numerator, BigInteger.ONE, true);
}
public BigFraction(long numerator, long denominator)
{
this(BigInteger.valueOf(numerator), BigI...
When to use reinterpret_cast?
...le confused with the applicability of reinterpret_cast vs static_cast . From what I have read the general rules are to use static cast when the types can be interpreted at compile time hence the word static . This is the cast the C++ compiler uses internally for implicit casts also.
...
Save ArrayList to SharedPreferences
...commit();
You can also serialize your ArrayList and then save/read it to/from SharedPreferences. Below is the solution:
EDIT:
Ok, below is the solution to save ArrayList as a serialized object to SharedPreferences and then read it from SharedPreferences.
Because API supports only storing and retri...
jquery - fastest way to remove all rows from a very large table
...grid library such as the excellent DataTables to load your data on the fly from the server, increasing the number of network calls, but decreasing the size of those calls. I had a very complicated table with 1500 rows that got quite slow, changing to the new AJAX based table made this same data seem...
to drawRect or not to drawRect (when should one use drawRect/Core Graphics vs subviews/images and wh
...e image get "flushed" back to the GPU. This round-trip of getting an image from the GPU, changing it, then uploading the whole image (or at least a comparatively large chunk of it) back to the GPU is rather slow. Also, the actual drawing that Quartz does, while really fast for what you are doing, is...
Get the current year in JavaScript
... today's date and time
var currentTime = new Date()
// returns the month (from 0 to 11)
var month = currentTime.getMonth() + 1
// returns the day of the month (from 1 to 31)
var day = currentTime.getDate()
// returns the year (four digits)
var year = currentTime.getFullYear()
// write output MM/...