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HttpServletRequest - how to obtain the referring URL?
...ng.
You, however, need to realize that this is a client-controlled value and can thus be spoofed to something entirely different or even removed. Thus, whatever value it returns, you should not use it for any critical business processes in the backend, but only for presentation control (e.g. hidin...
Big O of JavaScript arrays
Arrays in JavaScript are very easy to modify by adding and removing items. It somewhat masks the fact that most languages arrays are fixed-size, and require complex operations to resize. It seems that JavaScript makes it easy to write poorly performing array code. This leads to the question:
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php check if array contains all array values from another array
I would like to find out if $all contains all $search_this values and return true or false. any idea please?
5 Answers
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T-SQL get SELECTed value of stored procedure
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there are three ways you can use: the RETURN value, and OUTPUT parameter and a result set
ALSO, watch out if you use the pattern: SELECT @Variable=column FROM table ...
if there are multiple rows returned from the query, your @Variable will only contain the value from the l...
How to apply an XSLT Stylesheet in C#
I want to apply an XSLT Stylesheet to an XML Document using C# and write the output to a File.
4 Answers
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Using psql how do I list extensions installed in a database?
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@SoichiHayashi \dx is a psql command which was introduced with 9.0 when the create extension feature was released. So yes, you need to upgrade your psql as well (you should always use the psql version that matches your DB version)
– a_h...
How to access array elements in a Django template?
...ur object isn't a dict with 3 as a key, doesn't have an attribute named 3, and doesn't have a method named 3.
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MySQL/SQL: Group by date only on a Datetime column
...able GROUP BY DATE(a_table.mydate);
Or you can GROUP BY the alias as @orlandu63 suggested:
SELECT SUM(foo), DATE(mydate) DateOnly FROM a_table GROUP BY DateOnly;
Though I don't think it'll make any difference to performance, it is a little clearer.
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Notepad++: How to automatically set Language as Xml when load files
...was not working... turns out long ago I had already added it to Javascript and that was overriding the HTML setting.
– Lys777
Apr 7 at 1:39
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How to create a listbox in HTML without allowing multiple selection?
... It was probably downvoted because there isn't anything in the HTML standards that require the browser to render it as a listbox if the size attribute is set. Yes, all major browsers currently do, but there's no guarantee they always will. Realistically though, this would be a breaking change f...