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Finding duplicate values in MySQL
I have a table with a varchar column, and I would like to find all the records that have duplicate values in this column. What is the best query I can use to find the duplicates?
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ASP.NET MVC return empty view
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You can also just return null. ASP.NET will detect the return type null and will return an EmptyResult for you.
public ActionResult Empty()
{
return null;
}
See MSDN documentation for ActionResult for list of ActionResult types you can return.
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How to store arbitrary data for some HTML tags
...n example: links which send an AJAX request to get the content of articles and then display that data in a div. Obviously in this example, I need each link to store an extra bit of information: the id of the article. The way I've been handling it in case was to put that information in the href link ...
What are the differences between type() and isinstance()?
...of a base class, too), while checking for equality of type does not (it demands identity of types and rejects instances of subtypes, AKA subclasses).
Normally, in Python, you want your code to support inheritance, of course (since inheritance is so handy, it would be bad to stop code using yours fr...
__proto__ VS. prototype in JavaScript
What are the differences between __proto__ and prototype ?
30 Answers
30
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What's the purpose of META-INF?
...-INF folder containing some meta files. What is the purpose of this folder and what can I put there?
12 Answers
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Auto-reload browser when I save changes to html file, in Chrome?
I'm editing an HTML file in Vim and I want the browser to refresh whenever the file underneath changes.
22 Answers
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MySQL Error 1153 - Got a packet bigger than 'max_allowed_packet' bytes
I'm importing a MySQL dump and getting the following error.
14 Answers
14
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Get cursor position (in characters) within a text Input field
...s for me without this line. Be careful if you use blur event on your input and execute that function inside a callback.
– Kirill Reznikov
Sep 14 '15 at 9:35
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Can I record/play macros in Visual Studio 2012/2013/2015/2017/2019?
...a few minutes ago I was horrified to discover VS2012's omission of macros, and you posted this 11 hours before I got here!
– Shaul Behr
Nov 13 '12 at 11:11
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