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Generic List - moving an item within the list
... should remove before inserting ... your order may cause the list to do an allocation.
– Jim Balter
Nov 6 '18 at 15:47
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The model used to open the store is incompatible with the one used to create the store
..."MyApp.sqlite"];
NSMutableDictionary *options = [[NSMutableDictionary alloc] init];
[options setObject:[NSNumber numberWithBool:YES] forKey:NSMigratePersistentStoresAutomaticallyOption];
[options setObject:[NSNumber numberWithBool:YES] forKey:NSInferMappingModelAutomaticallyOption];
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What is the best regular expression to check if a string is a valid URL?
...EFFFD}!\$&'\(\)\*\+,;=:@])|[\/\?])*)?)$/i
How they were compiled (in PHP):
<?php
/* Regex convenience functions (character class, non-capturing group) */
function cc($str, $suffix = '', $negate = false) {
return '[' . ($negate ? '^' : '') . $str . ']' . $suffix;
}
function ncg($str, $...
.rar, .zip files MIME Type
I'm developing a simple php upload script, and users can upload only ZIP and RAR files.
6 Answers
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In Clojure, when should I use a vector over a list, and the other way around?
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Vectors have O(1) random access times, but they have to be preallocated. Lists can be dynamically extended, but accessing a random element is O(n).
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How to calculate the bounding box for a given lat/lng location?
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Here is a PHP implementation from the specification found at JanMatuschek.de: github.com/anthonymartin/GeoLocation.class.php
– Anthony Martin
Dec 3 '12 at 14:10
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No increment operator (++) in Ruby? [duplicate]
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I don't think that notation is available because—unlike say PHP or C—everything in Ruby is an object.
Sure you could use $var=0; $var++ in PHP, but that's because it's a variable and not an object. Therefore, $var = new stdClass(); $var++ would probably throw an error.
I'm not a R...
Functional programming - is immutability expensive? [closed]
...his algorithm has a very poor cache locality. I don’t know whether smart allocators in modern functional programming languages can mitigate this – but on modern machines, cache misses have become a major performance killer.
What’s the conclusion? Unlike others, I wouldn’t say that quickso...
How to develop or migrate apps for iPhone 5 screen resolution?
...height == 568)
{
UIViewController *viewController3 = [[[mainscreenview alloc] initWithNibName:@"iphone5screen" bundle:nil] autorelease];
}
else
{
UIViewController *viewController3 = [[[mainscreenview alloc] initWithNibName:@"iphone4screen" bundle:nil] autorelease];
}
...
What exactly are “spin-locks”?
...als), making statically dispatched calls into any code one doesn't own, or allocating memory.
It's also important to note that SpinLock is a value type, for performance reasons. As such, one must be very careful not to accidentally copy a SpinLock instance, as the two instances (the original and the...