大约有 6,000 项符合查询结果（耗时：0.0347秒） [XML]
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...
What is boxing and unboxing and what are the trade offs?
...
from C# 3.0 In a Nutshell:
Boxing is the act of casting a value
type into a reference type:
int x = 9;
object o = x; // boxing the int
unboxing is... the reverse:
// unboxing o
object o = 9;
int x = (int)o;
...
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...
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'...
Data binding to SelectedItem in a WPF Treeview
...
The cast to TreeViewItem fails for me I assume because I am using a HierarchicalDataTemplate applied from resources by datatype. But if you remove ChangeSelectedItem, then binding to a viewmodel and retrieving the item works fine...
How to check whether an array is empty using PHP?
...
An empty array is falsey in PHP, so you don't even need to use empty() as others have suggested.
<?php
$playerList = array();
if (!$playerList) {
echo "No players";
} else {
echo "Explode stuff...";
}
// Output is: No players
PHP's empty()...
How to remove the first character of string in PHP?
How to use PHP , Remove the first character :
13 Answers
13
...
Can I extend a class using more than 1 class in PHP?
...
No limitations as far as I know, PHP is a very permissive language for little hacks like this. :) As others have pointed out, it's not the proper OOP way of doing it though.
– Franck
Dec 10 '08 at 18:58
...
Want to exclude file from “git diff”
I am trying to exclude a file ( db/irrelevant.php ) from a Git diff. I have tried putting a file in the db subdirectory called .gitattributes with the line irrelevant.php -diff
and I have also tried creating a file called .git/info/attributes containing db/irrelevant.php .
...
'AND' vs '&&' as operator
...
+1: this should be made loud and clear in PHP documentation, or PHP should change and give same precedence to these operators or DEPRECATE and or once for all. I saw too many people thinking they are exactly the same thing and the answers here are more testimonials.
...