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What are file descriptors, explained in simple terms?
....h) opened by default on behalf of shell when the program starts.
FD's are allocated in the sequential order, meaning the lowest possible unallocated integer value.
FD's for a particular process can be seen in /proc/$pid/fd (on Unix based systems).
...
How to use PHP OPCache?
...econds) to check file timestamps for changes to the shared
;memory storage allocation.
opcache.revalidate_freq=60
;If enabled, a fast shutdown sequence is used for the accelerated code
;The fast shutdown sequence doesn't free each allocated block, but lets
;the Zend Engine Memory Manager do the wor...
Uncaught TypeError: Cannot read property 'msie' of undefined - jQuery tools
... This answer is no longer correct, since IE11 does not have the MSIE token in the userAgent string.
– Dave Methvin
May 5 '14 at 17:25
1
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How can I return NULL from a generic method in C#?
...: class, IList. If you have constraints to different types, you repeat the token where, as in where TFoo : class where TBar : IList.
– Jeppe Stig Nielsen
Sep 22 '19 at 8:17
ad...
Get the Last Inserted Id Using Laravel Eloquent
...ect the $fillable whitelist so you'll get errors with it trying to insert _token and anything that isn't a field in the database, end up setting things you want to filter, etc. That bummed me out, because I want to use mass assignment and overall write less code when possible. Fortunately Eloquent's...
Why is @autoreleasepool still needed with ARC?
...now there's a ton of objects ready to be cleared out, you have a loop that allocates a bunch of temp objects, so you "know" (or Instruments might tell you :) that adding a release pool around the loop would be a good idea.
– Graham Perks
Jan 31 '12 at 21:28
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Placeholder in UITextView
...at const UI_PLACEHOLDER_TEXT_CHANGED_ANIMATION_DURATION = 0.25;
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
#if __has_feature(objc_arc)
#else
[_placeHolderLabel release]; _placeHolderLabel = nil;
[_placeholderColor release]; _placeholderColor = nil;
...
When NOT to use yield (return) [duplicate]
...e O(n) in stack space. It is O(h) in heap space because each enumerator is allocated on the heap. (On implementations of C# I'm aware of; a conforming implementation might have other stack or heap space characteristics.)
But iterating a tree can be O(n) in time and O(1) in stack space. You can wr...
Creating a blurring overlay view
...tStyleDark];
UIVisualEffectView *blurEffectView = [[UIVisualEffectView alloc] initWithEffect:blurEffect];
//always fill the view
blurEffectView.frame = self.view.bounds;
blurEffectView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
[self.v...
Convert ArrayList to String[] array [duplicate]
...
According to Joshua Bloch in Effective Java, preallocating the array harms performance. Provide a zero-length array instead. stockList.toArray(new String[0])
– Crashh
Mar 10 '18 at 3:20
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