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How to use performSelector:withObject:afterDelay: with primitive types in Cocoa?
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Here is what I used to call something I couldn't change using NSInvocation:
SEL theSelector = NSSelectorFromString(@"setOrientation:animated:");
NSInvocation *anInvocation = [NSInvocation
invocationWithMethodSignature...
Accessing constructor of an anonymous class
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edited Dec 15 '16 at 22:33
Yasin Okumuş
1,86144 g...
How might I convert a double to the nearest integer value?
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answered Mar 11 '09 at 4:33
nickfnickf
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How to remove non-alphanumeric characters?
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edited Aug 23 '17 at 22:28
Louis
3,83033 gold badg...
while (1) Vs. for (;;) Is there a speed difference?
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In perl, they result in the same opcodes:
$ perl -MO=Concise -e 'for(;;) { print "foo\n" }'
a <@> leave[1 ref] vKP/REFC ->(end)
1 <0> enter ->2
2 <;> nextstate(main 2 -e:1) v ->3
9 <2> leaveloop vK/2 ->a
3 <{> enterloop(...
Reconnection of Client when server reboots in WebSocket
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When the server reboots, the Web Socket connection is closed, so the JavaScript onclose event is triggered. Here's an example that tries to reconnect every five seconds.
function start(websocketServerLocation){
ws = new WebSocket(websocketServerLocation);
ws.onmessag...
Undefined reference to vtable
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The GCC FAQ has an entry on it:
The solution is to ensure that all virtual methods that are not pure are defined. Note that a destructor must be defined even if it is declared pure-virtual [class.dtor]/7.
Therefore, you need to provide a definition for the virtual dest...
LINQ to Entities does not recognize the method 'System.String ToString()' method, and this method ca
...from one mysql server to a sql server but i can't figure out how to make this code work:
11 Answers
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NSOperation vs Grand Central Dispatch
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GCD is a low-level C-based API that enables very simple use of a task-based concurrency model. NSOperation and NSOperationQueue are Objective-C classes that do a similar thing. NSOperation was introduced first, but as of 10.5 and...
Is there a way to perform “if” in python's lambda
...r:
lambda x: True if x % 2 == 0 else False
But you can't use print or raise in a lambda.
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