大约有 7,000 项符合查询结果（耗时：0.0268秒） [XML]
Bad arguments to +：The operation + cannot accept the arguments:, [&qu...
原因是加号+前面是空字符串，不能有效地转换成数字，所以报错。
比如"123"这个字符串可以自动转数字，但是空文本不行。
文本要判断空，然后给数字 0。
同理，空文本不但不能转数字，也不能转列表、字典...
How can I get the current PowerShell executing file?
Note: PowerShell 1.0
I'd like to get the current executing PowerShell file name. That is, if I start my session like this:
...
Permission denied (publickey) when SSH Access to Amazon EC2 instance [closed]
I want to use my Amazon ec2 instance but faced the following error:
29 Answers
29
...
What is your preferred php deployment strategy? [closed]
I'm beginning a new project in PHP and I'd love to get some feedback from other developers on their preferred strategy for PHP deployment. I'd love to automate things a bit so that once changes are committed they can be quickly migrated to a development or production server.
...
How to unstash only certain files?
I stashed my changes. Now I want to unstash only some files from the stash. How can I do this?
7 Answers
...
Why should Java ThreadLocal variables be static
...mmonPool-worker-2->31->31
Start-ForkJoinPool.commonPool-worker-3->81->81
Start-ForkJoinPool.commonPool-worker-1->87->87
End-main->62->62
End-ForkJoinPool.commonPool-worker-1->87->87
End-ForkJoinPool.commonPool-worker-2->31->31
End-ForkJoinPool.commonPool-worker-3-...
AttributeError: 'module' object has no attribute 'urlopen'
I'm trying to use Python to download the HTML source code of a website but I'm receiving this error.
12 Answers
...
Manually adding a Userscript to Google Chrome
...lder tree, it will be wiped the next time Chrome restarts.
To control the directories and filenames to something more meaningful, you can:
Create a directory that's convenient to you, and not where Chrome normally looks for extensions. For example, Create: C:\MyChromeScripts\.
For each script cr...
How to increase the gap between text and underlining in CSS
...e: linear-gradient(
180deg, rgba(0,0,0,0),
rgba(0,0,0,0) 81%,
#222222 81.1%,
#222222 85%,
rgba(0,0,0,0) 85.1%,
rgba(0,0,0,0)
);
text-decoration: none;
}
<a href="#">Lorem ipsum</a> dolor sit amet, <a href="#">conset...
What is the best place for storing uploaded images, SQL database or disk file system? [closed]
...knows more about this I would love to hear it.
But I always try to use subdirectories to break things up a bit. Creation date often works well for this:
Images/2008/12/17/.jpg
...This provides a decent level of separation, and also helps a bit during debugging. Explorer and FTP clients alike can...