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Templated check for the existence of a class member function?
...E test
template <typename T>
class has_helloworld
{
typedef char one;
struct two { char x[2]; };
template <typename C> static one test( decltype(&C::helloworld) ) ;
template <typename C> static two test(...);
public:
enum { value = sizeof(test<T>...
No connection could be made because the target machine actively refused it?
...ages and platforms have basically the same API in this regard, even the C# one. This parameter is often configurable if you control the server, and is likely read from some settings file or the registry. Investigate how to configure your server.
If you wrote the server, you might have heavy proce...
JavaScript function in href vs. onclick
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The one time I would advocate for putting the function call inline vs. having an onclick event for the link is if you are dynamically creating links within the page that will all call the same function but may not have unique ids...
What is a loop invariant?
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There is one thing that many people don't realize right away when dealing with loops and invariants. They get confused between the loop invariant, and the loop conditional ( the condition which controls termination of the loop ).
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Converting a Java collection into a Scala collection
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For future reference: With Scala 2.8, it could be done like this:
import scala.collection.JavaConversions._
val list = new java.util.ArrayList[String]()
list.add("test")
val set = list.toSet
set is a scala.collection.immutable.Set[String] after this.
Also see Ben James' a...
Get selected text from a drop-down list (select box) using jQuery
... is the only Jquery that works with asp.net for me, I hence assent to that one. This one: ('$("#yourdropdownid option:selected").text();' did not work in an asp.net page using a master page.
– netfed
Sep 9 '13 at 16:40
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Removing whitespace from strings in Java
...") produce the same result.
The second regex is 20% faster than the first one, but as the number consecutive spaces increases, the first one performs better than the second one.
Assign the value to a variable, if not used directly:
st = st.replaceAll("\\s+","")
...
Quicksort: Choosing the pivot
When implementing Quicksort, one of the things you have to do is to choose a pivot. But when I look at pseudocode like the one below, it is not clear how I should choose the pivot. First element of list? Something else?
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How to round a number to significant figures in Python
I need to round a float to be displayed in a UI. E.g, to one significant figure:
20 Answers
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Zipping streams using JDK8 with lambda (java.util.stream.Streams.zip)
...s and it's up for the user to decide what behavior should be the "correct" one. Would you discard the elements from the longer stream or pad the shorter list? If so, with what value(s)?
– siki
Jun 29 '15 at 14:47
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