大约有 30,000 项符合查询结果（耗时：0.0460秒） [XML]
NULL values inside NOT IN clause
This issue came up when I got different records counts for what I thought were identical queries one using a not in where constraint and the other a left join . The table in the not in constraint had one null value (bad data) which caused that query to return a count of 0 records. I sort of u...
What is uintptr_t data type
What is uintptr_t and what can it be used for?
5 Answers
5
...
Is std::unique_ptr required to know the full definition of T?
I have some code in a header that looks like this:
8 Answers
8
...
Changing website favicon dynamically
...nk.type = 'image/x-icon';
link.rel = 'shortcut icon';
link.href = 'http://www.stackoverflow.com/favicon.ico';
document.getElementsByTagName('head')[0].appendChild(link);
})();
Firefox should be cool with it.
edited to properly overwrite existing icons
...
How to do a FULL OUTER JOIN in MySQL?
I want to do a Full Outer Join in MySQL. Is this possible? Is a Full Outer Join supported by MySQL?
15 Answers
...
How do I manipulate a variable whose name conflicts with PDB commands?
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
What is difference between MVC, MVP & MVVM design pattern in terms of coding c#
...
Great Explanation from the link : http://geekswithblogs.net/dlussier/archive/2009/11/21/136454.aspx
Let's First look at MVC
The input is directed at the Controller first, not the view. That input might be coming from a user interacting with a page, but it c...
Conditional import of modules in Python
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Download File Using jQuery
...ce article that shows many ways of hiding files from search engines:
http://antezeta.com/news/avoid-search-engine-indexing
JavaScript isn't a good way not to index a page; it won't prevent users from linking directly to your files (and thus revealing it to crawlers), and as Rob mentioned, ...
How do I use Wget to download all images into a single folder, from a URL?
...
Try this:
wget -nd -r -P /save/location -A jpeg,jpg,bmp,gif,png http://www.somedomain.com
Here is some more information:
-nd prevents the creation of a directory hierarchy (i.e. no directories).
-r enables recursive retrieval. See Recursive Download for more information.
-P sets the ...