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When would anyone use a union? Is it a remnant from the C-only days?
...hen you have very limited space to work with, or when you're developing an API (or something similar) and you want to force the end user to have only one instance of several objects/types at one time. Are these two guesses even close to right?
...
SHA1 vs md5 vs SHA256: which to use for a PHP login?
...hould upgrade, but until you do you can use password_compat to expose this API.
Also, please let password_hash() generate the salt for you. It uses a CSPRNG.
Two caveats of bcrypt
Bcrypt will silently truncate any password longer than 72 characters.
Bcrypt will truncate after any NUL characters....
How does PHP 'foreach' actually work?
...For internal classes, actual method calls are avoided by using an internal API that essentially just mirrors the Iterator interface on the C level.
Iteration of arrays and plain objects is significantly more complicated. First of all, it should be noted that in PHP "arrays" are really ordered dicti...
Interfaces — What's the point?
...creatureType);
}
Our front end could then have this injected (e.g an MVC API controller) through the constructor (typically):
public class CreatureController : Controller {
private readonly ICreatureFactory _factory;
public CreatureController(ICreatureFactory factory) {
_factory = fa...
What is 'Context' on Android?
...place the UI that the user interacts with'.
Developers familiar with other APIs and even non-developers might think of it vernacularly as a “screen.” That’s technically inaccurate, but it doesn’t matter for our purposes. So how do Activity and Context interact and what exactly is going in th...
How do SO_REUSEADDR and SO_REUSEPORT differ?
...y making false claims.
All that the code requires to build is a bit POSIX API (for the network parts) and a C99 compiler (actually most non-C99 compiler will work as well as long as they offer inttypes.h and stdbool.h; e.g. gcc supported both long before offering full C99 support).
All that the pr...
What's the difference between event.stopPropagation and event.preventDefault?
...alert("parent click event fired!")
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="foo">
<button id="but">button</button>
</div>
stopPropagation
$("#but").click(function (event) {
event.sto...
ObservableCollection Doesn't support AddRange method, so I get notified for each item added, besides
...
First of all, please vote and comment on the API request on the .NET repo.
Here's my optimized version of the ObservableRangeCollection (optimized version of James Montemagno's one).
It performs very fast and is meant to reuse existing elements when possible and avoid...
What is a NullPointerException, and how do I fix it?
...he evidence provided by the stack trace, the source code, and the relevant API documentation.
Let's illustrate with the simple example (above) first. We start by looking at the line that the stack trace has told us is where the NPE happened:
int length = foo.length(); // HERE
How can that throw ...
What does do?
...e W3C Cascading Style Sheets Level 2.1 Specification and the W3C Selectors API; it also provides limited support for the W3C Cascading Style Sheets Level 3 Specification (Working Draft) and other emerging standards.
IE7 mode renders content as if it were displayed in standards mode by Internet Exp...