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Why does this go into an infinite loop?
... much more idiomatic ways to illustrate this point.
Perhaps if we write out a method to do the equivalent of what x++ does it will make this clearer.
public MutableInt postIncrement(MutableInt x) {
int valueBeforeIncrement = x.intValue();
x.add(1);
return new MutableInt(valueBeforeIn...
Execute command on all files in a directory
...ctory of files, all of which need to be run through a program. The program outputs the results to standard out. I need a script that will go into a directory, execute the command on each file, and concat the output into one big output file.
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Why must jUnit's fixtureSetup be static?
...This is a fundamental design decision to make it easier to write tests without side-effects. Good tests do not have any order-of-run dependencies (see F.I.R.S.T) and creating fresh instances of the test class and its instance variables for each test is crucial in achieving this. Some testing framewo...
How can I replace every occurrence of a String in a file with PowerShell?
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@rob pipe the result to set-content or out-file if you want to save the modification
– Loïc MICHEL
Dec 6 '13 at 20:38
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Differences in boolean operators: & vs && and | vs ||
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// Bitwise OR
int d = a | b;
// 110
// | 100
// -----
// 110
System.out.println(c); // 4
System.out.println(d); // 6
Thanks to Carlos for pointing out the appropriate section in the Java Language Spec (15.22.1, 15.22.2) regarding the different behaviors of the operator based on its inputs. ...
Getting multiple keys of specified value of a generic Dictionary?
...List<TSecond> seconds;
if (!firstToSecond.TryGetValue(first, out seconds))
{
seconds = new List<TSecond>();
firstToSecond[first] = seconds;
}
if (!secondToFirst.TryGetValue(second, out firsts))
{
firsts = new Lis...
What is the use of “ref” for reference-type variables in C#?
...nd that if I pass a value-type ( int , struct , etc.) as a parameter (without the ref keyword), a copy of that variable is passed to the method, but if I use the ref keyword a reference to that variable is passed, not a new one.
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What is wrong with using goto? [duplicate]
...mdomming through xkcd and saw this one (if also read some negative texts about them some years ago):
What is actually wrong with it? Why are goto's even possible in C++ then?
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How to get the current time in YYYY-MM-DD HH:MI:Sec.Millisecond format in Java?
The code below gives me the current time. But it does not tell anything about milliseconds.
15 Answers
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Auto-expanding layout with Qt-Designer
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After creating your QVBoxLayout in Qt Designer, right-click on the background of your widget/dialog/window (not the QVBoxLayout, but the parent widget) and select Lay Out -> Lay Out in a Grid from the bottom of the context-menu. The QVBoxLayout shoul...