大约有 14,600 项符合查询结果（耗时：0.0280秒） [XML]
MySQL, Check if a column exists in a table with SQL
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I threw this stored procedure together with a start from @lain's comments above, kind of nice if you need to call it more than a few times (and not needing php):
delimiter //
-- ------------------------------------------------------------
-- Use the inforamtion_schema t...
What is the difference between parseInt() and Number()?
...
The Number() constructor can also handle hexadecimal number, they have to start with 0x.
Example:
console.log(parseInt('0xF', 16)); // 15
// z is no number, it will only evaluate 0xF, therefore 15 is logged
console.log(parseInt('0xFz123', 16));
// because the radix is 10, A is consid...
What are the typical reasons Javascript developed on Firefox fails on IE? [closed]
... the document of an IFrame:
Firefox and IE8+: IFrame.contentDocument (IE started supporting this from version 8.)
IE: IFrame.contentWindow.document
(IFrame.contentWindow refers to the window in both browsers.)
Canvas: Versions of IE before IE9 don't support the <canvas> element. IE does sup...
Error - Unable to access the IIS metabase
...access-the-iis-metabase.aspx
To quote
The solution to this is simple: start your Visual Studio with "Run as
Administrator". You can do this by right clicking the shortcut and
selecting "Run as Administrator".
share...
Learning Regular Expressions [closed]
... your own patterns but also how to understand patterns written by others.
Start simple
Conceptually, the simplest regular expressions are literal characters. The pattern N matches the character 'N'.
Regular expressions next to each other match sequences. For example, the pattern Nick matches the ...
Easiest way to open a download window without navigating away from the page
...e file to be downloaded:
<script type="text/javascript">
function startDownload()
{
var url='http://server/folder/file.ext';
window.open(url, 'Download');
}
</script>
Then put this in the body, which will start the download automatically after 5 seconds:
<s...
How do I install a NuGet package .nupkg file locally?
...o uninstall the existing nuget and it is easy fix. fine, do that. When I restart computer and do install again, same error comes back, signature mismatch... so now I am stuck with the old version gone, new version doesn't want to install.
– Tom
Apr 20 '12 at 5:...
Tips for using Vim as a Java IDE? [closed]
...
I've been a Vim user for years. I'm starting to find myself starting up Eclipse occasionally (using the vi plugin, which, I have to say, has a variety of issues). The main reason is that Java builds take quite a while...and they are just getting slower and slo...
IIS - 401.3 - Unauthorized
I am trying to get started with using IIS. I created a new site on IIS Manager, mapped it to a folder on my file system and added index.html to the folder. I have set the port to 85 for this site. When I try to access http://localhost:85/index.html , I get the following error message:
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Application Loader stuck at “Authenticating with the iTunes store” when uploading an iOS app
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This only started happening to me today (May 2017) and no answers in this thread solved my issue. The resolution for me was from here;
https://forums.developer.apple.com/thread/76803
Open Terminal. Change to home directory,
cd ~
...