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Is it better in C++ to pass by value or pass by constant reference?
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It used to be generally recommended best practice1 to use pass by const ref for all types, except for builtin types (char, int, double, etc.), for iterators and for function objects (lambdas, classes deriving from std::*_function).
This was es...
What happens when there's insufficient memory to throw an OutOfMemoryError?
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The JVM never really runs out of memory. It does memory computation of the heap stack in advance.
The Structure of the JVM, Chapter 3, section 3.5.2 states:
If Java virtual machine stacks can be dynamically expanded, and expansion is...
iOS 5 Best Practice (Release/retain?)
...e for writing apps to be used either with iOS 5 or older versions? Specifically, should I continue using the release/retain of data, or should I ignore that? Does it matter?
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How to make a PHP SOAP call using the SoapClient class
...t! id: 100, name: John, description: Barrel
of Oil, amount: 500' (length=98)
Happy Coding!
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How does the Java 'for each' loop work?
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I've found just calling a while-loop like while (someList.hasMoreElements()) { //do something }} - gets me close to the coding grace I'd hoped to find when I searched for this question.
– James T Snell
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Inserting string at position x of another string
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John
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answered Jun 11 '13 at 17:52
jasin_89jasin_89
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What does if __name__ == “__main__”: do?
...ngs:
it sets a few special variables like __name__, and then
it executes all of the code found in the file.
Let's see how this works and how it relates to your question about the __name__ checks we always see in Python scripts.
Code Sample
Let's use a slightly different code sample to explore ho...
One-liner to take some properties from object in ES 6
...to make it much more compact than your answer (or torazburo's), but essentially what you're trying to do is emulate Underscore's pick operation. It would be easy enough to re-implement that in ES6:
function pick(o, ...fields) {
return fields.reduce((a, x) => {
if(o.hasOwnProperty(x)...
Web colors in an Android color xml resource file
What do all of the X11/w3c color codes look like in the format of an Android XML resource file?
11 Answers
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Collisions when generating UUIDs in JavaScript?
...rom Math.random(). For some browsers the entropy is as low as just 41 bits all together. Calling Math.random() multiple times won't raise the entropy. If you really want unique v4 UUIDs you need to use a cryptographically strong RNG that produces at least 122bit entropy per UUID generated.
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