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Immutability of Strings in Java
...t, and changing a reference. s2 still points to the same object as we initially set s1 to point to. Setting s1 to "Help!" only changes the reference, while the String object it originally referred to remains unchanged.
If strings were mutable, we could do something like this:
String s1 = "Hello";
St...
Python argparse: How to insert newline in the help text?
...nfortunately Only the name of this class is considered a public API. All the methods provided by the class are considered an implementation detail. So probably not a great idea, although it might not matter, since 2.7 is meant to be the last 2.x python and you'll be expected to refactor lots ...
“Private” (implementation) class in Python
I am coding a small Python module composed of two parts:
7 Answers
7
...
BaseException.message deprecated in Python 2.6
...of the exception hierarchy.
Provides an 'args' attribute that contains all arguments passed
to the constructor. Suggested practice, though, is that only a
single string argument be passed to the constructor."""
__str__ and __repr__ are already implemented in a meaningful way,
especiall...
Backbone.View “el” confusion
...d as well, and so for other people that get here, this fiddle might help - http://jsfiddle.net/hRndn/2/
var MyView = Backbone.View.extend({
events: {
"click .btn" : "sayHello",
},
sayHello : function() {
alert("Hello");
},
render : function() {
this.$...
Undefined reference to `pow' and `floor'
...
Look in /lib or /usr/lib. The libraries are all named lib<name>.a or lib<name>.so - it's the "<name>" you put after the -l. In this case, the math library is named libm.so, so we call it -lm.
– ams
Dec 29 '11 at ...
Is there a difference between YES/NO,TRUE/FALSE and true/false in objective-c?
...e between bool and BOOL, check out this webpage for an explanation of why:
http://iosdevelopertips.com/objective-c/of-bool-and-yes.html
Because BOOL is an unsigned char rather than a primitive type, variables of type BOOL can contain values other than YES and NO.
Consider this code:
BOOL b = 42;
...
Where is my Django installation?
...
Current top (accepted) answer works with my Ubuntu installation. As does yours. As do all of them!
– Adam Marshall
Apr 28 '14 at 14:24
...
PHP - Move a file into a different folder on the server
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Why is Scala's immutable Set not covariant in its type?
...
at http://www.scala-lang.org/node/9764 Martin Odersky writes:
"On the issue of sets, I believe the non-variance stems also from the implementations. Common sets are implemented as hashtables, which are non-variant arrays of ...