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MySQL - why not index every field?
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and also every index takes some database space
– Acanthus
Mar 26 '11 at 23:33
@...
What is the purpose of a stack? Why do we need it?
...rand addresses and a result address is going to be enormous.
We use stack-based opcodes because stacks solve the common problem. Namely: I want to allocate some temporary storage, use it very soon and then get rid of it quickly when I'm done. By making the assumption that we have a stack at our dis...
Nohup is not writing log to output file
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python as well as other C stdio-based programs uses line-buffering in interactive case (stdout is connected to a tty) and block-buffering when redirected to a file. If python -u doesn't work; nohup might have introduced its own buffering.
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What is the gain from declaring a method as static
...inally better at most, since the code does not need to do dynamic dispatch based on the type.
However, a much stronger argument against refactoring into static methods is that currently using static is considered bad practice. Static methods / variables do not integrate well into an object oriente...
Why does sun.misc.Unsafe exist, and how can it be used in the real world?
...tiated by sun.misc.Unsafe, useful for instrumentation
sun.misc.Unsafe.arrayBaseOffset and arrayIndexScale can be used to develop arraylets,a technique for efficiently breaking up large arrays into smaller objects to limit the real-time cost of scan, update or move operations on large objects
http://...
What should every JavaScript programmer know? [closed]
...ss/instance system you actually wanted; when you might want to use closure-based objects instead of prototyping. (Most JS tutorial material is absolutely terrible on this; it took me years to get it straight in my head.)
How this is determined at call-time, not bound; how consequently method-passing...
RESTful Authentication
...d software architecture.
HTTP basic auth over HTTPS
This first solution, based on the standard HTTPS protocol, is used by most web services.
GET /spec.html HTTP/1.1
Host: www.example.org
Authorization: Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==
It's easy to implement, available by default on all browse...
Null or default comparison of generic argument in C#
...ify its own custom overload. The compiler determines which overload to use based on the static type of the variable (the determination is not polymorphic). Therefore, if you change your example to constrain the generic type parameter T to a non-sealed reference type (such as Exception), the compiler...
When to use IList and when to use List
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It's always best to use the lowest base type possible. This gives the implementer of your interface, or consumer of your method, the opportunity to use whatever they like behind the scenes.
For collections you should aim to use IEnumerable where possible. Thi...
PHP Multidimensional Array Searching (Find key by specific value)
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Another poossible solution is based on the array_search() function. You need to use PHP 5.5.0 or higher.
Example
$userdb=Array
(
(0) => Array
(
(uid) => '100',
(name) => 'Sandra Shush',
(url) => 'urlof100'
),...