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Simulator or Emulator? What is the difference?
...
It seems that most people use these words the other way, as in: simulation generally happens on a higher level than emulation (notwithstanding that both words are rarely used together in a given context). See for example the Android Emulator versus Apple's Simu...
Getting an element from a Set
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Strong words, @David Ogren. Meh? Crazy? But in your comment, you are using the words "identical" and "equal" as if they meant the same thing. They do not. Specifically, in Java, identity is expressed by the "==" operator and equalit...
What are good alternatives to SQL (the language)? [closed]
...he demands we place on it today. I don't think we'd find so many varied keywords if we designed the language today, I suspect join syntax would be different, functions like GROUP_CONCAT would have more regular syntax rather than sticking more keywords in the middle of the parentheses to control its ...
How to use @Nullable and @Nonnull annotations more effectively?
...ause even though you cite these two advantages, in both cases you used the word "can." That means that there is no guarantee that these checks will actually occur. Now, that behavioral difference could be useful for performance-sensitive tests that you'd like to avoid running in production mode, for...
Good Hash Function for Strings
.... As for why, a quick search on google reveals this article: computinglife.wordpress.com/2008/11/20/… explaining why 31 was used for Java string hashing. There is no mathematical proof given, but it does explain the general concept as to why primes work better.
– Pharap
...
vim repeat find next character 'x'
... x to find next occurrence of character 'x',
but overlook that there is a word (or more words) containing 'x' in between the word I want to edit and the beginning cursor position.
...
What are the minimum margins most printers can handle?
... had a smaller margins or something like an IBM 3812. You can always open Word and set page margins to 0, Word will prompt to fix these, the values it enters are the smallest margins the device supports are reported by the driver. The Lexmark laser beside me shows .248".
– Do...
Do Java arrays have a maximum size?
...u can see this claim being repeated:
/**
* Some VMs reserve some header words in an array.
* Attempts to allocate larger arrays may result in
* OutOfMemoryError: Requested array size exceeds VM limit
*/
private static final int MAX_ARRAY_SIZE = Integer.MAX_VALUE - 8;
which is added by Marti...
How to generate keyboard events in Python?
... ("dy", wintypes.LONG),
("mouseData", wintypes.DWORD),
("dwFlags", wintypes.DWORD),
("time", wintypes.DWORD),
("dwExtraInfo", wintypes.ULONG_PTR))
class KEYBDINPUT(ctypes.Structure):
_fields_ = (("wVk", ...
When to use self over $this?
...o the current
object. Use self to refer to the
current class. In other words, use
$this->member for non-static members,
use self::$member for static members.
Full Answer
Here is an example of correct usage of $this and self for non-static and static member variables:
<?php
class X ...