大约有 2,900 项符合查询结果（耗时：0.0093秒） [XML]
Can I replace groups in Java regex?
...s) {
// replace with "%" what was matched by group 1
// input: aaa123ccc
// output: %123ccc
System.out.println(replaceGroup("([a-z]+)([0-9]+)([a-z]+)", "aaa123ccc", 1, "%"));
// replace with "!!!" what was matched the 4th time by the group 2
// input: a1b2c3d4e5
// outp...
Sort an Array by keys based on another Array?
...adding the keys with data from your actual array:
$customer['address'] = '123 fake st';
$customer['name'] = 'Tim';
$customer['dob'] = '12/08/1986';
$customer['dontSortMe'] = 'this value doesnt need to be sorted';
$properOrderedArray = array_merge(array_flip(array('name', 'dob', 'address')), $custo...
Start a git commit message with a hashmark (#)
...
As you are able to have a commit message of "#123 Commit message" as well as comments in clients such as GitHub for Mac and SourceTree I guess is what these clients are doing yes?
– Phil Ostler
Feb 12 '14 at 11:47
...
What does the PHP error message “Notice: Use of undefined constant” mean?
...example, this is OK, since underscores are allowed in variable names:
if (123 === $my_var) {
do_something();
}
But this isn't:
if (123 === $my-var) {
do_something();
}
It'll be interpreted the same as this:
if (123 === $my - var) { // variable $my minus constant 'var'
do_something();
}...
Convert JavaScript string in dot notation into an object reference
...,'etc']) #works with both strings and lists
5
> index(obj,'a.b.etc', 123) #setter-mode - third argument (possibly poor form)
123
> index(obj,'a.b.etc')
123
...though personally I'd recommend making a separate function setIndex(...). I would like to end on a side-note that the original...
浅析为什么char类型的范围是 -128~+127 - C/C++ - 清泛网 - 专注C/C++及内核技术
...负数的反码是原码除了符号位，其余为都取反，因此-1 的源码为 1 0000001 ，反码为 1 1111110, 现在再用反码来计算 1+(-1)
0000 0001
+ 1111 1110
————————
1111 1111 …………再转化为原码就是 1000 0000 = -0 ，虽然...
Blocks and yields in Ruby
... gift from foo!") if block_given?
end
foo(10)
# OK: called as foo(10)
foo(123) {|y| puts "BLOCK: #{y} How nice =)"}
# OK: called as foo(123)
# BLOCK: A gift from foo! How nice =)
Or, using the special block argument syntax:
def bar(x, &block)
puts "OK: called as bar(#{x.inspect})"
block....
程序员之网络安全系列（三）：数据加密之对称加密算法 - 更多技术 - 清泛网...
...8B4QCotyZkKf091WElCwG659QiVVw0=
Decrypeted: I Love You, Li Li
.NET 源码：
using System;
using System.Security.Cryptography;
using System.IO;
using System.Text;
namespace AES
{
class MainClass
{
public static void Main (string[] args)
{
string password = "Don't beli...
What is the benefit of zerofill in MySQL?
... y INT(8) NOT NULL);
INSERT INTO yourtable (x,y) VALUES
(1, 1),
(12, 12),
(123, 123),
(123456789, 123456789);
SELECT x, y FROM yourtable;
Result:
x y
00000001 1
00000012 12
00000123 123
123456789 123456789
...
partial string formatting
...n't 100% control. Imagine: "{foo} {{bar}}".format(foo="{bar}").format(bar="123") from the other examples. I would expect "{bar} 123" but they output "123 123".
– Benjamin Manns
Sep 21 '18 at 13:53
...