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dealloc in Swift
....apple.com/library/content/releasenotes/Foundation/RN-FoundationOlderNotes/index.html#X10_11Notes
NSNotificationCenter
In OS X 10.11 and iOS 9.0 NSNotificationCenter and NSDistributedNotificationCenter will no longer send notifications to registered observers that may be deallocated. If the observe...
Center Align on a Absolutely Positioned Div
...idth, as follows:
div#thing {
position: absolute;
top: 0px;
z-index: 2;
width:400px;
margin-left:-200px;
left:50%;
}
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How to keep keys/values in same order as declared?
...simple array with integers for the sparse hash table, where those integers index into another array that stores the key-value pairs (plus the calculated hash). That latter array just happens to store the items in insertion order, and the whole combination actually uses less memory than the implement...
How do I detect the Python version at runtime? [duplicate]
... @NauticalMile Chris's answer also returns a string, he's just indexing into the first character to see if it is '3' or not; the same would work here.
– weberc2
Oct 9 '17 at 13:57
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Is it possible to group projects in Eclipse?
...plorer.
Simpl grouping to reduce clutter.
http://help.eclipse.org/galileo/index.jsp?topic=/org.eclipse.platform.doc.user/concepts/cworkset.htm
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What happens to C# Dictionary lookup if the key does not exist?
...'t in dictionary; "value" is now 0
}
(Using ContainsKey and then the the indexer makes it look the key up twice, which is pretty pointless.)
Note that even if you were using reference types, checking for null wouldn't work - the indexer for Dictionary<,> will throw an exception if you reque...
Are single quotes allowed in HTML?
...t;img src='cid:xxx' ... /> to show a inline image it will not appear at all because the content id was ignored. You have to use `<img src="cid:xxx" ... /> instead.
– Earth Engine
Feb 12 '13 at 0:51
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HTTP GET request in JavaScript?
...ndle the response inside an event handler.
function httpGetAsync(theUrl, callback)
{
var xmlHttp = new XMLHttpRequest();
xmlHttp.onreadystatechange = function() {
if (xmlHttp.readyState == 4 && xmlHttp.status == 200)
callback(xmlHttp.responseText);
}
xml...
What does asterisk * mean in Python? [duplicate]
...It separates regular parameters from keyword-only parameters. From the doc index page for '*': docs.python.org/dev/reference/compound_stmts.html#index-22
– Éric Araujo
Oct 30 '15 at 23:40
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How to randomly pick an element from an array
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You can use the Random generator to generate a random index and return the element at that index:
//initialization
Random generator = new Random();
int randomIndex = generator.nextInt(myArray.length);
return myArray[randomIndex];
...