走过海棠暮

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走过海棠暮 2024-10-11 13:33:18

尝试使用文档 ready 函数或其速记版本,而不是窗口加载事件来包装代码。

 $(function() {
    ...
 });

Try using the document ready function, or it's shorthand version, instead of the window load event to wrap your code.

 $(function() {
    ...
 });

Internet Explorer 中的 JQuery 脚本问题

走过海棠暮 2024-10-11 10:32:32

其他答案都很好,但添加 LIMIT 1 (或 等效,以防止检查不必要的行。

The other answers are quite good, but it would also be useful to add LIMIT 1 (or the equivalent, to prevent the checking of unnecessary rows.

SQL:如何正确检查记录是否存在

走过海棠暮 2024-10-11 09:24:52

如果你想要内存泄漏,据我所知,你必须使用 TP 对象:-) 它们是 Delphi 中唯一未初始化/最终化的结构化类型

If you want a memory leak, afaik you have to use TP objects :-) They are afaik the only structured types in Delphi that are not initialized/finalized

我在这里造成内存泄漏吗?

走过海棠暮 2024-10-11 04:56:21

我认为我的问题可以通过以下方法之一解决:

  1. 我重置 IIS。
  2. 我删除了机器上的cookie。

奇迹般的是,它奏效了。感谢您的回复 AviD。

I think my issue is resolved by one of the below ways:

  1. I reset my IIS.
  2. I deleted my cookies on the machine.

Miraculously, it worked. Thanks for your responses AviD.

HttpContext.Current.User.IsInRole() 授权问题

走过海棠暮 2024-10-10 23:05:50

Emacs 有一个矩形选择模式,例如: http: //emacs-fu.blogspot.com/2008/12/working-with-rectangle-selections.html

更好的是,如果启用 cua-mode,输入 Ctrl-Enter 将使您进入矩形选择模式,即非常容易使用。

http://trey-jackson.blogspot .com/2008/10/emacs-tip-26-cua-mode-specially.html

Emacs has a rectangular selection mode, see for example: http://emacs-fu.blogspot.com/2008/12/working-with-rectangular-selections.html

Even better, if you enable cua-mode, entering Ctrl-Enter will put you in rectangle selection mode that is very easy to use.

http://trey-jackson.blogspot.com/2008/10/emacs-tip-26-cua-mode-specifically.html

使用 Emacs 交换 2 列

走过海棠暮 2024-10-10 12:40:06

我的猜测是你的变量是罪魁祸首。您可以尝试使用 trim 清理它们:https://www.php.net/修剪

My guess is your variables are to blame. You might try cleaning them up with trim: https://www.php.net/trim.

PHP:如何防止不必要的换行

走过海棠暮 2024-10-10 12:08:18

试试这个:

echo "20101106213245" | sed -r 's/^.{8}/& /;:a; s/([ :])(..)\B/\1\2:/;ta'

结果:

20101106 21:32:45
  • 在第八个字符之后插入一个空格
  • [标签 a] 在空格或冒号以及接下来的两个字符之后,添加一个冒号
  • 如果进行了替换,请转到标签 a

您也想要一些连字符吗?

echo "20101106213245" | sed -r 's/^.{4}/&-/;:a; s/([-:])(..)\B/\1\2:/;ta;s/:/-/;s/:/ /'

结果:

2010-11-06 21:32:45
  • 在第四个字符后插入一个连字符
  • [标签 a] 在连字符或冒号以及接下来的两个字符之后,添加一个冒号
  • 如果进行了替换,请转到标签 a
  • 将第一个冒号更改为连字符 (2010-11 :06:21:32:45 -> 2010-11-06:21:32:45)
  • 将下一个冒号更改为空格 (2010-11-06 :21:32:45 ->2010-11-06 21:32:45)

Try this:

echo "20101106213245" | sed -r 's/^.{8}/& /;:a; s/([ :])(..)\B/\1\2:/;ta'

Result:

20101106 21:32:45
  • Insert a space after the eighth character
  • [label a] After a space or colon and the next two characters, add a colon
  • If a replacement was made, goto label a

You want some hyphens, too?

echo "20101106213245" | sed -r 's/^.{4}/&-/;:a; s/([-:])(..)\B/\1\2:/;ta;s/:/-/;s/:/ /'

Result:

2010-11-06 21:32:45
  • Insert a hyphen after the fourth character
  • [label a] After a hyphen or colon and the next two characters, add a colon
  • If a replacement was made, goto label a
  • Change the first colon to a hyphen (2010-11:06:21:32:45 -> 2010-11-06:21:32:45)
  • Change the next colon to a space (2010-11-06:21:32:45 -> 2010-11-06 21:32:45)

如何将 YYYYMMDDHHMMSS 转换为“date”可读的日期

走过海棠暮 2024-10-10 10:11:36

最简单的方法是将它们全部删除,尝试编译,然后重新添加编译器认为缺少的内容。这有点烦人,但确实很容易处理。

请注意,正如马蒂亚斯已经指出的那样,从技术上讲,在运行时通过字符串名称访问资源是可能的,我在这里建议的方法将删除这些资源,尽管它们实际上是需要的。然而,这种模式在任何应用程序中都应该很少见,如果您是编写它的人,您已经知道是否/在哪里进行这种处理。

The easiest way is to remove them all, attempt to compile, and re-add those the compiler says are lacking. It's a little tiresome, but it's certainly tractable.

Note, as Mathias already pointed out, that it's technically possible to access resources by name with a string at runtime, and the way I suggest here would remove such resources though they are, in fact, needed. However, this pattern should be really rarely seen in any application, and if you are the one who wrote it, you already know if/where you do such treatment.

确定是否不再使用诸如 strings.xml 中的资源

走过海棠暮 2024-10-10 07:23:02

在 64 位 Windows 和 64 位 Office(2010、2013)环境中,有很多关于此错误的报告。修复或解决方法有点奇怪,但似乎对大多数人都有效。

Microsoft Access Database Engine 2010 Redistributable”安装包似乎这是一种很自然的方法,但有几份报告称它不起作用。

相反,使用“2007 Office System 驱动程序:数据连接组件< /a>”似乎可以解决大多数人的上述问题。

On 64-bit Windows and 64-bit Office (2010, 2013) environments, there are many reports on this error. The fix or workaround is a bit strange but seems to work for most people out there.

The "Microsoft Access Database Engine 2010 Redistributable" installation package seems the natural one to use but several reports says it does not work.

Instead, using the "2007 Office System Driver: Data Connectivity Components" seems to solve the above problem for most people.

找不到可安装的 ISAM

走过海棠暮 2024-10-10 05:37:20

fzero 并非微不足道。
如果您的函数是多项式,请尝试 GSL http://www.gnu.org/software/gsl/

fzero is non trivial.
If your function is polynomial, try GSL http://www.gnu.org/software/gsl/

C++ 的 MATLAB 代码库

走过海棠暮 2024-10-09 14:38:15

据我所知,.NET 内存模型并不能保证一个线程中对变量所做的更改在另一个线程中可见。你需要一个内存屏障。最简单(尽管不是最有效)的组织方法是使用 lockInterlocked 方法。

顺便说一句,忙碌的等待并不是实现目标的最佳方法。也许您想切换到具有适当条件变量(Monitor(用 C# 的说法)用法?

As far as I know, the .NET memory model doesn't guarantee that the changes of a variable made in one thread will be visible in another thread. You need a memory barrier there. The simplest (though not the most efficient) way to organize that is by using lock or Interlocked methods.

By the way, busy waiting is not the best method to achieve your goal. Maybe you'd like to switch to the producer-consumer model with appropriate condition variable (Monitors in C# parlance) usage?

使用 bool 来同步多个线程是否安全?

走过海棠暮 2024-10-09 08:42:51

我认为你使用的语言并不禁止你开发一些免费的库等等。该技术的系统并非(全部)免费,但这并不意味着您不能用它来做开源产品。

如果你开发 C#,你就在某种程度上“赞助”了微软,微软并不真正喜欢开放软件,你可能会发现这是一个问题。

我是一名 C# 开发人员,对此没有任何问题,因为我在工作中编写的每个代码都是专有代码,所以不知何故我也是一名专有代码开发人员,我无法逃避这一点。

我没有看到专有代码有任何问题:)

I think the language you use does not forbid you to developing some free library or so on. The systems are not (all) free for this technology, but it doesn't mean that you can't do open source products with it.

If you develop C#, you are somehow "sponsoring" Microsoft, which doesn't really like open software, which you may find a problem.

I am a C# developer and have no problems with that, because every code I wrote in my work was a proprietary code, so somehow I am also a proprietary-code-developer, I can't run away from that.

And I don't see any problem on proprietary code :)

学习.NET;赞助我不同意的心态?

走过海棠暮 2024-10-09 07:47:37

它有一个 if 检查,但不知道如何处理结果。我想你希望它得到回显,所以它应该是这样的:

function postORempty($field)
{ 
echo ((isset($_POST[$field])) ? $_POST[$field] : ""); 
}

或者返回它:

function postORempty($field)
{ 
return ((isset($_POST[$field])) ? $_POST[$field] : ""); 
}

It has a if check but doesnt know what to do with the result. I presume you want it to be echoed so this is what it should be:

function postORempty($field)
{ 
echo ((isset($_POST[$field])) ? $_POST[$field] : ""); 
}

or return it:

function postORempty($field)
{ 
return ((isset($_POST[$field])) ? $_POST[$field] : ""); 
}

我的功能出了什么问题? (用户定义函数的新增内容)

走过海棠暮 2024-10-09 01:59:46

取出通配符匹配表达式(。*)

RewriteCond %{THE_REQUEST} ^index\.php
RewriteRule ^index\.php$ http://www.thisdomain.co.uk/$1 [R=301,L]

应该做您要寻找的事情。这样,您甚至可能不需要rewriteCond

Take out the wildcard match expression (.*):

RewriteCond %{THE_REQUEST} ^index\.php
RewriteRule ^index\.php$ http://www.thisdomain.co.uk/$1 [R=301,L]

Should do what you are looking for. With this, you may not even need the RewriteCond

index.php 重定向的正则表达式(但有点复杂!)

走过海棠暮 2024-10-08 20:49:32

read_ahead 与delayed_write 相反,因为读取与写入相反。

如果您想读取并发送更大的内存块,则不需要 read_ahead,只需读取大块并发送它们(此处保存的操作系统调用不多)。

来自 read_ahead 上的 file:open/2 联机帮助页:

如果 read/2 调用的大小不显着小于或什至大于 Size
字节,预计不会有任何性能提升。

打开时不需要指定和索引。只需使用 pwrite/3position/2write/2

但是在文件的不同位置写入可能只会减少 delayed_write 的增益,因为(也是 文件:open/2):

缓冲的
数据也会在其他文件之前刷新
执行 write/2 以外的操作。

如果您有多个位置的大量数据,请将它们收集在 {Location, Bytes} 列表中,并时不时用 file:pwrite/2 一口气完成。这可以映射到非常高效的 writev(2) 系统调用,一次性写入多个块。

read_ahead is kind of the opposite of delayed_write in the sense that reading is the opposite of writing.

If you want to read and send bigger chunks of memory you don't need read_ahead, just read big chunks and send them (not many os calls to save here).

From the file:open/2 manpage on read_ahead:

If read/2 calls are for sizes not significantly less than, or even greater than Size
bytes, no performance gain can be expected.

You don't need to specify and index when opening. Just use pwrite/3 or a combination of position/2 and write/2.

But writing in different positions of the file might just reduce the gain of delayed_write since (also manpage of file:open/2):

The buffered
data is also flushed before some other file
operation than write/2 is executed.

If you have chunks of data for several positions collect them in a list of {Location, Bytes} and from time to time write them with file:pwrite/2 all in one go. This can map to very efficient writev(2) system call that writes several chunks in one go.

将 open(Filename, {delayed_write, Size, Delay}) 与索引结合起来

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