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Traits vs. interfaces
I've been trying to study up on PHP lately, and I find myself getting hung up on traits. I understand the concept of horizontal code reuse and not wanting to necessarily inherit from an abstract class. What I don't understand is: What is the crucial difference between using traits versus interfaces?...
Algorithm to randomly generate an aesthetically-pleasing color palette [closed]
...lly pleasing colors. So no crazy neon colors, colors reminiscent of feces, etc.
16 Answers
...
PHP Sort Array By SubArray Value
...- $b["optionNumber"];
}
...
usort($array, "cmp_by_optionNumber");
In PHP ≥5.3, you should use an anonymous function instead:
usort($array, function ($a, $b) {
return $a['optionNumber'] - $b['optionNumber'];
});
Note that both code above assume $a['optionNumber'] is an integer. Use @St...
第一个Hello,OS World操作系统 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...0
其中，主要的步骤代码中都有详尽的注释，如有任何问题，请移步至论坛《深入OS》板块发帖讨论。
编译执行过程：
打开dos窗口，进入源码所在目录，执行命令nasm boot.asm -o pfos.img：
同目录下生成一个"pfos.img"软盘映...
What are important languages to learn to understand different approaches and concepts? [closed]
...
What about Prolog (for unification/backtracking etc), Smalltalk (for "everything's a message"), Forth (reverse polish, threaded interpreters etc), Scheme (continuations)?
Not a language, but the Art of the Metaobject Protocol is mind-bending stuff
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How to update a single library with Composer?
...ust want to update a few packages and not all, you can list them as such:
php composer.phar update vendor/package:2.* vendor/package2:dev-master
You can also use wildcards to update a bunch of packages at once:
php composer.phar update vendor/*
--prefer-source: Install packages from source wh...
Difference between array_map, array_walk and array_filter
... arbitrary parameter to pass to the callback. This mostly irrelevant since PHP 5.3 (when anonymous functions were introduced).
Length of Returned Array:
The resulting array of array_map has the same length as that of the largest input array; array_walk does not return an array but at the same tim...
PHP: Count a stdClass object
...od works, I would not use it for implementation because future versions of PHP could cause this code to break, I much prefer Alan Strom's answer.
– ars265
Jul 14 '13 at 12:32
...
Is it possible to make an HTML anchor tag not clickable/linkable using CSS?
...mean you should write C and not use PHP? iOS has UIKit, Core Data, Quartz, etc. Flash has tons of commonly used 3rd party libraries. Again, each framework has its purpose. A purist, not-built-in-house mentality won't help anyone.
– pixelfreak
Jul 18 '11 at 0:48...
Best way to give a variable a default value (simulate Perl ||, ||= )
...
In PHP 7 we finally have a way to do this elegantly. It is called the Null coalescing operator. You can use it like this:
$name = $_GET['name'] ?? 'john doe';
This is equivalent to
$name = isset($_GET['name']) ? $_GET['name'...