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cancelling a handler.postdelayed process
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Remove any pending posts of callbacks and sent messages whose obj is
token. If token is null, all callbacks and messages will be removed.
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Why check both isset() and !empty()
... @karim IMO empty is one of the most misunderstood functions in PHP. The tiny snippet about "no warning is generated" is very easy to overlook. I had to scan the documentation myself a few times to spot it to post it here.
– deceze♦
Dec 30 '10 at 4...
How to create a fixed-size array of objects
... initialize it with nil values, you can use an UnsafeMutableBufferPointer, allocate memory for 64 nodes with it, and then read/write from/to the memory by subscripting the pointer type instance. This also has the benefit of avoiding checking if the memory must be reallocated, which Array does. I wou...
Is it possible to make the -init method private in Objective-C?
...ect is used, don't bother. Specifically, don't bother with the "override +allocWithZone:, -init, -retain, -release" method of creating singletons. It's virtually always unnecessary and is just adding complication for no real significant advantage.
Instead, just write your code such that your +sha...
PHP PDO returning single row
...together. LIMIT has the effect that the database returns only one entry so PHP has to handle very less data. With fetch you get the first (and only) result entry from the database reponse.
You can do more optimizing by setting the fetching type, see http://www.php.net/manual/de/pdostatement.fetch.p...
Check to see if a string is serialized?
... unserialize raw user data since it can be used as an attack vector. OWASP:PHP_Object_Injection
– ArtBIT
Sep 1 '17 at 18:56
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How do I Sort a Multidimensional Array in PHP [duplicate]
...s[$key] = $row[0];
}
array_multisort($dates, SORT_DESC, $mdarray);
For PHP >= 5.5.0 just extract the column to sort by. No need for the loop:
array_multisort(array_column($mdarray, 0), SORT_DESC, $mdarray);
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Which parts of Real World Haskell are now obsolete or considered bad practice?
...re_ptr -- release with free()
return (Right (Regex reg str))
As malloc() should be used with free(), new with delete, allocate with deallocate, one should always use the correct function.
TL;DR You should always free memory with the same allocator that allocated it for you.
If a fore...
List of Big-O for PHP functions
After using PHP for a while now, I've noticed that not all built-in PHP functions are as fast as expected. Consider these two possible implementations of a function that finds if a number is prime using a cached array of primes.
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What is the use of the @ symbol in PHP?
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It suppresses error messages — see Error Control Operators in the PHP manual.
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