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What does the construct x = x || y mean?
... after the || (as far as i remember):
undefined
false
0
'' (Null or Null string)
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Why shouldn't I use PyPy over CPython if PyPy is 6.3 times faster?
...e significantly slower. 3. PyPy used to be slower than CPython at handling strings - now it's often better and rarely worse. 4. Many "scripts" are just glue code - making the interpreter faster won't improve overall runtimes in that case. 5. PyPy's warmup times used to be larger - short running scri...
Rename a file using Java
...e by moving it to a new name. (FileUtils is from Apache Commons IO lib)
String newFilePath = oldFile.getAbsolutePath().replace(oldFile.getName(), "") + newName;
File newFile = new File(newFilePath);
try {
FileUtils.moveFile(oldFile, newFile);
} catch (IOException e) {
e.printStackT...
Should I learn C before learning C++? [closed]
... that every book on C++ will not cover pointers and memory management, and string literals, etc.? I'm going to stop discussing now but feel free to leave your closing comments.
– Brian R. Bondy
Jun 23 '10 at 13:27
...
TextView bold via xml file?
...yout_height="wrap_content"
android:textStyle="bold"
android:text="@string/app_name"
android:layout_gravity="center"
/>
So, I'm guessing you need to use android:textStyle
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When is localStorage cleared?
...less popular) alternatives to
cookies include techniques involving query strings, hidden form
fields, flash based local shared objects, etc. Each with their own set
of problems related to security, ease of use, size restrictions etc.
So up until now we have been using pretty bad ways of stor...
Function to clear the console in R and RStudio
...ws,
shell("clear") if on Linux or Mac.
(shell() passes a command (or any string) to the host terminal.)
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How do I tell Maven to use the latest version of a dependency?
...sion numbers - if you do not conform to a strict pattern Maven compares as strings and not numbers.
– Thorbjørn Ravn Andersen
Feb 25 '13 at 13:19
...
Wrapping StopWatch timing with a delegate or lambda?
...xample will profile the action lambda with 1-16 threads:
static void Main(string[] args)
{
Action action = () =>
{
for (int i = 0; i < 10000000; i++)
Math.Sqrt(i);
};
for(int i=1; i<=16; i++)
Console.WriteLine(i + " thread(s):\t" +
...
Functions that return a function
...can return a true/false value. An integer (1,2,3,4...). You can return a string. You can return a complex object with multiple properties. And you can return a function. a function is just a thing.
In your case, returning b returns the thing, the thing is a callable function. Returning b() re...