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Converting 'ArrayList to 'String[]' in Java
...th array, even creating it and throwing it away, is on average faster than allocating an array of the right size. For benchmarks and explanation see here: shipilev.net/blog/2016/arrays-wisdom-ancients
– Stuart Marks
Jan 21 '16 at 8:29
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What's the rationale for null terminated strings?
...implementation, no hidden indirection, no hidden integer.
no hidden memory allocation involved (well, some infamous non
standard functions like strdup
perform allocation, but that's mostly
a source of problem).
no specific issue for small or large hardware (imagine the burden to
manage 32 bits prefi...
How do I properly escape quotes inside HTML attributes?
...
If you are using PHP, try calling htmlentities or htmlspecialchars function.
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Why are local variables not initialized in Java?
...n, but they aren't related to whether the SomeObject instance was property allocated, then they should go in another try-finally block, probably one that wraps the one I've shown.
Requiring variables to be assigned manually before use does not lead to real problems. It only leads to minor hassles, ...
Event system in Python
... limited interface, but higher performance".
pyeventdispatcher is based on PHP's Symfony framework's event-dispatcher.
dispatcher was extracted from django.dispatch but is getting fairly old.
Cristian Garcia's EventManger is a really short implementation.
Others:
pluggy contains a hook system whic...
When to use virtual destructors?
...destructor called
So the destruction of the base pointer (which takes an allocation on derived object!) follows the destruction rule, i.e first the Derived, then the Base.
On the other hand, there is nothing like a virtual constructor.
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Convert Base64 string to an image file? [duplicate]
...4_decode($image));
You can create 'public_feeds' in laravel's filesystem.php-
'public_feeds' => [
'driver' => 'local',
'root' => public_path() . '/uploads/feeds',
],
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Can I list-initialize a vector of move-only type?
...&... items) {
typedef std::unique_ptr<T> value_type;
// Allocate memory for all items
std::vector<value_type> result(sizeof...(Items));
// Initialize the array in place of allocated memory
new (result.data()) value_type[sizeof...(Items)] {
make_unique<...
How many threads can a Java VM support?
...eat: my machine does not have 2583 GB of RAM. Or swap. And the JVM doesn't allocate thread-local heap space. So that can't be it...
– benjismith
Apr 18 '09 at 20:37
49
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How should equals and hashcode be implemented when using JPA and Hibernate
...y resulting in errors and / or data corruption) because your entity may be allocated to a bucket not matching its current hashCode().
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