走过海棠暮

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走过海棠暮 2024-10-21 10:26:42

你没有说你指的是哪种语言,所以我说如何使用 Qt 在 Python 中做到这一点:
首先,您在Qt Designer应用程序中做不到

通过 Qt 设计器应用程序设计 GUI 后,您应该添加以下行
python 代码到您的 FILE.py (使用 pyuic5 生成):

MainWindow.setWindowFlags(QtCore.Qt.CustomizeWindowHint)

you didn't say which language you mean, so I say how to do it in Python with Qt :
First of all, you can't-do it in Qt Designer application!

After you designed your GUI via Qt designer app, then you should add this line of
python code to your FILE.py (generated with pyuic5) :

MainWindow.setWindowFlags(QtCore.Qt.CustomizeWindowHint)

设计一个没有标题栏的窗口 - QT Designer

走过海棠暮 2024-10-21 09:58:31

printf() 通常不能很好地衡量崩溃程度。使用 fprintf(stderr, ... 代替。printf() 的输出是缓冲的,而 stderr 的输出不是。我怀疑您的问题稍后会出现。

printf() is generally not a good measure of crashedness. Use fprintf(stderr, ... instead. printf()'s output is buffered, the output to stderr is not. I suspect your problem occurs later.

C代码问题..有人能帮忙吗?

走过海棠暮 2024-10-21 06:16:34
$ cat values.txt
apple
banana
car
taxi

$ cat source.txt
fruits
mango
king
queen
number
23
43
sentence is long
so what
...
...

我制作了一个小 shell 脚本来“清除”values.txt 文件中存在的源文件中的值。

$cat weed_out.sh
from=$1
cp -p $from $from.final
for x in `cat values.txt`;
do
 grep -v $x $from.final > $from.final.tmp
 mv $from.final.tmp $from.final
done

执行...

$ ./weed_out source.txt

你会得到一个清理干净的文件...

$ cat values.txt
apple
banana
car
taxi

$ cat source.txt
fruits
mango
king
queen
number
23
43
sentence is long
so what
...
...

I made a small shell scrip to "weed" out the values in source file which are present in values.txt file.

$cat weed_out.sh
from=$1
cp -p $from $from.final
for x in `cat values.txt`;
do
 grep -v $x $from.final > $from.final.tmp
 mv $from.final.tmp $from.final
done

executing...

$ ./weed_out source.txt

and you get a nicely cleaned up file....

从一个文件中删除另一文件中的行

走过海棠暮 2024-10-21 06:11:19

我实际上刚刚想通了这一点。 strtotime 作为一种格式,可以接受 时间,而无需冒号

因此,strtotime(165000)strtotime('16:50:00') 相同。

http://ideone.com/Z4hwQ

I actually just figured this out. strtotime, as a format, can accept times without colons.

Therefore, strtotime(165000) is the same as strtotime('16:50:00').

http://ideone.com/Z4hwQ

strtotime 将整数转换为时间戳

走过海棠暮 2024-10-21 02:38:05

我通过 QT 创建 txt 编码无 BOM 的 UTF-8 的经验为:

file.open(QIODevice::WriteOnly | QIODevice::Text);
QTextStream out(&file);
out.setCodec("UTF-8"); // ...
vcfline = ctn; //assign some utf-8 characters
out.setGenerateByteOrderMark(false);
out << vcfline; //.....
file.close();

并且该文件将编码无 BOM 的 UTF-8。

My experience to create txt encoding UTF-8 without BOM by QT as:

file.open(QIODevice::WriteOnly | QIODevice::Text);
QTextStream out(&file);
out.setCodec("UTF-8"); // ...
vcfline = ctn; //assign some utf-8 characters
out.setGenerateByteOrderMark(false);
out << vcfline; //.....
file.close();

And the file will be encoding UTF-8 without BOM.

在 Qt 中创建 UTF-8 文件

走过海棠暮 2024-10-21 02:32:06

只要你使用 jquery,DataTables 就是一个有用的插件,我去年夏天在一个项目中使用过它,它完成了大部分任务您列出的内容。

As long as you're using jquery, DataTables is a useful plugin I used on a project last summer that accomplishes most of what you listed.

寻找 jQuery + AJAX + PHP5/PDO + MySQL 记录集分页小部件

走过海棠暮 2024-10-20 18:17:24

注册域名以确保唯一性。如果您注册 example.com (您不能),请使用 com.example.AAA (不要。您必须找到自己独特的域和命名空间。)

Register a domain name to insure uniqueness. If you register example.com (you can't), use com.example.AAA (don't. You have to find your own unique domain and namespace.)

通过 iTunes 的 App Store 错误:无效的捆绑标识符命名空间 com.yourcompany

走过海棠暮 2024-10-20 02:54:41

TiddlyWiki 是用 Javascript 编写的,它确实会将自身写入本地磁盘。检查来源,看看他们是如何做到的。

http://svn.tiddlywiki.org/Trunk/core/js/FileSystem.js

TiddlyWiki is written in Javascript and it does indeed write itself to local disk. Check the sources to see how they do it.

http://svn.tiddlywiki.org/Trunk/core/js/FileSystem.js

我可以使用哪些网络语言从网络/浏览器应用程序写入磁盘?

走过海棠暮 2024-10-20 00:56:48

刚刚遇到了同样的问题...这通常只影响使用被动模式(这很常见)的 GUI ftp 客户端。例如,当使用标准 ftp 命令行工具时,我能够成功登录并将文件上传到我的 ftp 服务器。

更正步骤是:

  1. 将以下设置添加到 /etc/vsftpd.conf 文件中:

    pasv_enable=YES
    pasv_min_port=64000
    pasv_max_port=64321
    port_enable=YES

  2. 还可以根据您的情况将以下配置块之一添加到 /etc/vsftpd.conf 文件中(无论哪种方式,都需要解析为公共可访问的 IP):

a:

pasv_address=<your-static-ip-most-likely-from-elastic-ips>
pasv_addr_resolve=NO

-OR-

b :

pasv_address=<your-publicly-resolvable-host-name>
pasv_addr_resolve=YES
  1. 在 ec2 实例的安全组配置中,添加以下自定义入站 tcp 规则:
  • 为标准 ftp 启用端口 20-21
  • 启用上面配置部分中定义的被动端口(我使用 64000-64321)
  1. 重新启动 vsftpd 服务(因情况而异)取决于您的 Linux 风格)

注意:pasv 端口范围应该在防火墙外部可见,NAT

参考以获取更多信息:

Just had this same exact issue... this typically only affects GUI ftp clients that use a passive mode (which is pretty common). For instance, when using the standard ftp command line tool, I was able to successfully login and upload files to my ftp server.

The steps to correct are:

  1. Add the following settings to your /etc/vsftpd.conf file:

    pasv_enable=YES
    pasv_min_port=64000
    pasv_max_port=64321
    port_enable=YES

  2. Also add one of the following config chunks to your /etc/vsftpd.conf file, based on your situation (either way, this needs to resolve to a public accessible IP):

a:

pasv_address=<your-static-ip-most-likely-from-elastic-ips>
pasv_addr_resolve=NO

-OR-

b:

pasv_address=<your-publicly-resolvable-host-name>
pasv_addr_resolve=YES
  1. In your security group configuration for ec2 instances, add the following custom inbound tcp rules:
  • Enable ports 20-21 for standard ftp
  • Enable your passive ports as defined in the config sections above (I used 64000-64321)
  1. Restart your vsftpd service (varies depending on your flavor of linux)

Note: pasv port range should be visible outside from the firewall, NAT

References for more info:

vsftpd 错误列出目录

走过海棠暮 2024-10-20 00:23:21

我猜你需要一个 32 位整数和大尾数法来启动:

>>> from ctypes import c_uint32
>>> l = c_uint32(0x12345678)
>>> bytes(l)
b'xV4\x12'

还有 c_uint8、c_uint16 和 c_uint64。对于较长的整数,您需要使用 divmod(x, 256) 手动制作。

>>> def bytify(v):
...   v, r = divmod(v, 256)
...   yield r
...   if v == 0:
...      raise StopIteration
...   for r in bytify(v):
...     yield r
... 
>>> [x for x in bytify(0x12345678)]
[120, 86, 52, 18]
>>> bytes(bytify(0x12345678))
b'xV4\x12
>>> bytes(bytify(0x123456789098765432101234567890987654321))
b'!Ce\x87\t\x89gE#\x01!Ce\x87\t\x89gE#\x01'

I'm guessing you need a 32-bit integer, and big-endian to boot:

>>> from ctypes import c_uint32
>>> l = c_uint32(0x12345678)
>>> bytes(l)
b'xV4\x12'

There is c_uint8, c_uint16 and c_uint64 as well. For longer ints you need to make it manually, using divmod(x, 256).

>>> def bytify(v):
...   v, r = divmod(v, 256)
...   yield r
...   if v == 0:
...      raise StopIteration
...   for r in bytify(v):
...     yield r
... 
>>> [x for x in bytify(0x12345678)]
[120, 86, 52, 18]
>>> bytes(bytify(0x12345678))
b'xV4\x12
>>> bytes(bytify(0x123456789098765432101234567890987654321))
b'!Ce\x87\t\x89gE#\x01!Ce\x87\t\x89gE#\x01'

在python3中将n字节int转换为字节

走过海棠暮 2024-10-19 22:30:13

JavaFX 中为所有 UI 控件引入了 EventHandler。而侦听器是为可观察对象(例如属性)借用的。

EventHandler 是一种区分可观察事件和 ui 事件的方法。

EventHandler is introduced in the JavaFX for all the UI controls. Whereas the Listener is borrowed for Observables, such as properties.

The EventHandler is a way to distinguish observable events and the ui events.

事件监听器和事件监听器有什么区别? Java 中的处理程序?

走过海棠暮 2024-10-19 20:24:36

虽然不是唯一的方法,但我最喜欢的是使用“假列”技巧:http: //www.alistapart.com/articles/fauxcolumns/

基本思想是将渐变背景放置在包裹内容和侧边栏的 div 中。该包装器 div 保证与最长的 DIV 一样大,因此您的渐变始终可见。

Although not the only way, to do it, my favorite is to use the "faux column" trick: http://www.alistapart.com/articles/fauxcolumns/

The basic idea is to place the gradient background in a div that wraps both the content and the sidebar. That wrapper div is guaranteed to be as big as the longest DIV, therefore your gradient is always visible.

使用 div 获得两个等高列的最简单方法

走过海棠暮 2024-10-19 14:28:07
select distinct sno  # distinct in case of duplicates
from spj A
left join spj B on A.sno = B.sno and B.pno = 5  # same supplier supplies part 5
where A.pno = 3  # supplies part 3
  and B.sno is null  # no match on left join
select distinct sno  # distinct in case of duplicates
from spj A
left join spj B on A.sno = B.sno and B.pno = 5  # same supplier supplies part 5
where A.pno = 3  # supplies part 3
  and B.sno is null  # no match on left join

我该如何执行此 SQL SELECT 语句?

走过海棠暮 2024-10-19 12:52:07

不,它们不需要位于行的开头,但前面只能有空格(空格、制表符……)。

通常它们被放在行的开头,因为它们不受其所属范围的限制,因为它们在实际的 C 代码之前进行了预处理。

No, they don't need to be at the beginning of the line, but they can only have blanks (spaces, tabs, ...) before them.

Usually they're put at the beginning of the line because they're not subjected to the scopes they're into, since they're preprocessed before actual C code.

预处理器指令应该位于行的开头吗?

走过海棠暮 2024-10-19 12:22:23

抱歉,但是为什么你要把你的包装机器人放在你的包装顶部里面,把这个 div 放在包装顶部 div 的末端下面不是更好吗,这可能会解决问题,事实上我通常只是在末尾放一个带有 z 的图像-索引小于我想要在其顶部的任何内容。这通常效果很好

sorry but why have you got your wrapbot inside your wrap top, isnt it better just to have that div below the end of the wrap top div, this may fix issue, in actual fact i usually just put an image at the end with a z-index of less than anything that i want on the top of it. This works well usually

如何在网站顶部和底部制作单独的背景图像?

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