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“Collection was mutated while being enumerated” on executeFetchRequest
...antiate the background moc
self.backgroundMOC = [[[NSManagedObjectContext alloc] init] autorelease];
[self.backgroundMOC setPersistentStoreCoordinator:[self.managedObjectContext persistentStoreCoordinator]];
...in the _importData method (just before to register the controller as observer for the...
What is Serialization?
... process of converting unordered data (such as an object) into a series of tokens which can be used later to reconstruct the original data. The serialized form is most often a string of text, but doesn't have to be.
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Reference: Comparing PHP's print and echo
... a dedicated SAPI function).
Speed: echo x vs print x
Unlike echo, print allocates a temporary variable. However, the amount of time spent on this activity is minuscule, so the difference between these two language constructs is negligible.
Speed: echo a,b,c vs echo a.b.c
The first one compiles...
.Net HttpWebRequest.GetResponse() raises exception when http status code 400 (bad request) is return
...tringBuilder msg = new StringBuilder();
msg.AppendLine("POST /o/oauth2/token HTTP/1.1");
msg.AppendLine("Host: accounts.google.com");
msg.AppendLine("Content-Type: application/x-www-form-urlencoded");
msg.AppendLine("Content-Length: " + contentAsBytes.Length.ToString());
msg.Appe...
How to pass objects to functions in C++?
...of which is handling ownership of an object. When an object is dynamically allocated with new, it must be deallocated with delete (or the [] versions thereof). The object or function that is responsible for the destruction of the object is considered the owner of the resource. When a dynamically all...
Static method in a generic class?
...<Object>.doIt(object) and got a compile-time error! "Syntax error on token(s), misplaced construct(s)". Clazz.doIt(object) works fine though, not even a warning.
– André Chalella
Jun 1 '09 at 20:14
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How to see an HTML page on Github as a normal rendered HTML page to see preview in browser, without
...ate repositories. Git makes the URLs for these like public URLs by adding ?token=<hash>, but these tools should understand it and pass it to GH together with the rest.
– zakmck
Sep 9 '16 at 8:43
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What are the most widely used C++ vector/matrix math/linear algebra libraries, and their cost and be
...not safely pass-by-value
use of Eigen types as members requires special allocator customization (or you crash)
use with stl container types and possibly other templates required
special allocation customization (or you will crash)
certain compilers need special care to prevent crashes on fu...
Maximum packet size for a TCP connection
...t) for Ethernet, for instance, is 1500 bytes. Some types of networks (like Token Ring) have larger MTUs, and some types have smaller MTUs, but the values are fixed for each physical technology.
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writing some characters like '
...t; on android axml since &lt and &gt still not recognized as valid token
– jace
Jan 5 '18 at 2:48
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