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Is it possible to GROUP BY multiple columns using MySQL?
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Preference of left to right is applied to the ascending order of the groupings and not the column group preference. GROUP BY applies col1+col2. e.g. col1 = 1, 2, 1, 2 | col2 = 1, 2, 3, 2 and running GROUP BY col1,col2 would return 1,1|1,3|2,2 as opposed to 1,1|2,2 as suggested. Wh...
Start ssh-agent on login
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You can also use Type=simple. wiki.archlinux.org/index.php/…
– Hans-J. Schmid
Jan 9 '19 at 15:46
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Solving “Who owns the Zebra” programmatically?
... It basically allows concluding of facts from statements made using First Order Logic. FOL is basically a more advanced form of propositional logic. If you decide you don't want to use Prolog, you could use a similar system of your own creation using a technique such as modus ponens to perform th...
git rebase without changing commit timestamps
...ch), I suppose you can organize your Git history with whatever commit date order you want/need, even set it to the future!.
As Olivier mentions in his question, the author date is never changed by a rebase;
From the Pro Git Book:
The author is the person who originally wrote the work,
whereas ...
No generic implementation of OrderedDictionary?
There doesn't appear to be a generic implementation of OrderedDictionary (which is in the System.Collections.Specialized namespace) in .NET 3.5. Is there one that I'm missing?
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SQL - Update multiple records in one query
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Camille's solution worked. Turned it into a basic PHP function, which writes up the SQL statement. Hope this helps someone else.
function _bulk_sql_update_query($table, $array)
{
/*
* Example:
INSERT INTO mytable (id, a, b, c)
VALUES...
What's the difference between a 302 and a 307 redirect?
...g the method to GET.
Example usage: if the browser sent POST to /register.php, then now load (GET) /success.html.
307: temporary redirect, repeating the request identically.
Example usage: if the browser sent a POST to /register.php, then this tells it to redo the POST at /signup.php.
308: permanen...
How do I get indices of N maximum values in a NumPy array?
...copy of an array from unconstrained min to unconstrained max in a reversed order)
– FizBack
Oct 19 '16 at 13:51
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Using reCAPTCHA on localhost
...ing from reCAPTCHA v1 to v2, it is necessary to regenerate the API keys in order for this message to disappear. Further, and equally important, if you're like me and you setup test domains in your local/development environment by placing entries into the operating system's "hosts" file, you will ne...
What are the Dangers of Method Swizzling in Objective-C?
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Possible naming conflicts
Swizzling changes the method's arguments
The order of swizzles matters
Difficult to understand (looks recursive)
Difficult to debug
These points are all valid, and in addressing them we can improve both our understanding of method swizzling as well as the methodology ...