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Swift Beta performance: sorting arrays
...].
Here is an in-place quicksort in Swift Beta:
func quicksort_swift(inout a:CInt[], start:Int, end:Int) {
if (end - start < 2){
return
}
var p = a[start + (end - start)/2]
var l = start
var r = end - 1
while (l <= r){
if (a[l] < p){
l...
What is the best way to get all the divisors of a number?
...iplying the same powers etc. Looks Pythonic, but I don't think Python is about killing performance. Problem two: the divisors are not returned in order.
– Tomasz Gandor
Dec 10 '14 at 14:37
...
What's the difference between compiled and interpreted language?
...ence is not in the language; it is in the implementation.
Having got that out of my system, here's an answer:
In a compiled implementation, the original program is translated into native machine instructions, which are executed directly by the hardware.
In an interpreted implementation, the origi...
Xcode 4 and Core Data: How to enable SQL Debugging
...L in the logs when I'm debugging. There is some info in this blog post about how to enable raw SQL logging for iOS Core Data development. The given example is for Xcode 3 and it's just not clear to me how to enable this in Xcode 4.
...
How can I get the full object in Node.js's console.log(), rather than '[Object]'?
...nsole.log(util.inspect(myObject, false, null, true /* enable colors */))
Outputs
{ a: 'a', b: { c: 'c', d: { e: 'e', f: { g: 'g', h: { i: 'i' } } } } }
See util.inspect() docs.
share
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improve...
String vs. StringBuilder
...s performance difference in my applications between the two, I now think about it a little more carefully.
Luckily, it's relatively straightforward to run performance analysis on your code to see where you're spending the time, and then to modify it to use StringBuilder where needed.
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What is HEAD in Git?
...f the HEAD as the "current branch". When you switch branches with git checkout, the HEAD revision changes to point to the tip of the new branch.
You can see what HEAD points to by doing:
cat .git/HEAD
In my case, the output is:
$ cat .git/HEAD
ref: refs/heads/master
It is possible for HEAD to...
error: writable atomic property cannot pair a synthesized setter/getter with a user defined setter/g
...he same problem and after doing a bit of research, here is my conclusion about this issue:
The compiler warns you about a @property that you declared as atomic (i.e. by omitting the nonatomic keyword), yet you provide an incomplete implementation of how to synchronize access to that property.
To ...
What is the purpose of class methods?
...nce, but still involve the class in some way. The most interesting thing about them is that they can be overridden by subclasses, something that's simply not possible in Java's static methods or Python's module-level functions.
If you have a class MyClass, and a module-level function that operates ...
How do I calculate tables size in Oracle
...on as sp_spaceused. Still the potential answers I got are most of the time outdated or don't work. Probably because I'm no DBA on the schema I'm working with.
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