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How can I use Timer (formerly NSTimer) in Swift?
...st be internal or public.
@objc func update() {
// Something cool
}
For Swift 4, the method of which you want to get the selector must be exposed to Objective-C, thus @objc attribute must be added to the method declaration.
...
In STL maps, is it better to use map::insert than []?
...rite
map[key] = value;
there's no way to tell if you replaced the value for key, or if you created a new key with value.
map::insert() will only create:
using std::cout; using std::endl;
typedef std::map<int, std::string> MyMap;
MyMap map;
// ...
std::pair<MyMap::iterator, bool> res...
What predefined macro can I use to detect clang?
...ed to compile my source code. I can easily find predefined macros to check for MSVC or GCC (see http://predef.sourceforge.net/ for example), but I cannot find any macro to check for clang.
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How do I safely pass objects, especially STL objects, to and from a DLL?
...ause there's no standard C++ ABI (application binary interface, a standard for calling conventions, data packing/alignment, type size, etc.), you will have to jump through a lot of hoops to try and enforce a standard way of dealing with class objects in your program. There's not even a guarantee it'...
How to update a menu item shown in the ActionBar?
...
Option #1: Try invalidateOptionsMenu(). I don't know if this will force an immediate redraw of the action bar or not.
Option #2: See if getActionView() returns anything for the affected MenuItem. It is possible that showAsAction simply automatically creates action views for you. If so, you...
Mercurial .hgignore for Visual Studio 2008 projects
What is a good setup for .hgignore file when working with Visual Studio 2008?
7 Answers
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PHP: If internet explorer 6, 7, 8 , or 9
I want to do a conditional in PHP for the different versions of Internet Explorer along the lines of:
17 Answers
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Structs in Javascript
...mes.split(' ');
var count = names.length;
function constructor() {
for (var i = 0; i < count; i++) {
this[names[i]] = arguments[i];
}
}
return constructor;
}
var Item = makeStruct("id speaker country");
var row = new Item(1, 'john', 'au');
alert(row.speaker); // displays: j...
Find MongoDB records where array field is not empty
... that index is utilized during the query, you will get unexpected results. For example: db.doc.find({'nums': { $gt: [] }}).hint({ _id: 1 }).count() returns the right number, while db.doc.find({'nums': { $gt: [] }}).hint({ nums: 1 }).count() returns 0.
– wojcikstefan
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std::string formatting like sprintf
I have to format std::string with sprintf and send it into file stream. How can I do this?
40 Answers
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