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How do I safely pass objects, especially STL objects, to and from a DLL?
...ency in the way your class's data members are aligned in memory.
Member reordering
If your class is not standard-layout, the compiler can rearrange its data members in memory. There is no standard for how this is done, so any data rearranging can cause incompatibilities between compilers. Passing ...
How do I animate constraint changes?
...r.constant = 50
self.view.setNeedsLayout()
animator.startAnimation()
The order of changing constraints and starting an animator is important - if we just change the constraints and leave our animator for some later point, the next redraw cycle can invoke autolayout recalculation and the change wil...
How do we control web page caching, across all browsers?
Our investigations have shown us that not all browsers respect the HTTP cache directives in a uniform manner.
29 Answers
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Examples of Algorithms which has O(1), O(n log n) and O(log n) complexities
...switch the O(log n) list to be before the O(n) list so that the list is in order from best to worst. haha :)
– Sam Eaton
Sep 12 '15 at 4:54
4
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How efficient is locking an unlocked mutex? What is the cost of a mutex?
...thread to sleep; that is obviously extremely slow (system calls are in the order of 10 mircoseconds). Normally that is not really a problem because that thread has to sleep anyway-- but it could be a problem with high contention where a thread can't obtain the lock for the time that it normally spin...
How does SIGINT relate to the other termination signals such as SIGTERM, SIGQUIT and SIGKILL?
On POSIX systems, termination signals usually have the following order (according to many MAN pages and the POSIX Spec):
6 ...
Convert.ChangeType() fails on Nullable Types
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You have to get the underlying type in order to do that...
Try this, I've used it successfully with generics:
//Coalesce to get actual property type...
Type t = property.PropertyType();
t = Nullable.GetUnderlyingType(t) ?? t;
//Coalesce to set the safe value us...
What is RSS and VSZ in Linux memory management
...79087] mongod invoked oom-killer: gfp_mask=0x6200ca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0
So we see that interestingly it was the MongoDB daemon that always runs in my laptop on the background that first triggered the OOM killer, presumably when the poor thing was trying to allocate some...
How do I sort strings alphabetically while accounting for value when a string is numeric?
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Pass a custom comparer into OrderBy. Enumerable.OrderBy will let you specify any comparer you like.
This is one way to do that:
void Main()
{
string[] things = new string[] { "paul", "bob", "lauren", "007", "90", "101"};
foreach (var thing in...
Django migration strategy for renaming a model and relationship fields
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Thank you! I tried many different strategies in order to rename a model that other models have foreign keys to (steps 1-3), and this was the only one that worked.
– MSH
Jan 1 at 10:36
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