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MySQL/SQL: Group by date only on a Datetime column
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Are you sure the second one works? On SQL Server, this fails, and it fails for a good reason. I would expect it to fail anywhere else as well. Can you confirm that MySQL actually handles this query?
– Tomalak
D...
Best practices for in-app database migration for Sqlite
I am using sqlite for my iphone and I anticipate the database schema might change over time. What are the gotchas, naming conventions and things to watch out for to do a successful migration each time?
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How to sort a list of lists by a specific index of the inner list?
...e comments. If you can't find a question that covers it, you should create one.
– John La Rooy
Aug 23 '17 at 0:13
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show 2 more comments
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How do you read a file into a list in Python? [duplicate]
...or: 'list' object has no attribute 'splitlines'
– TheOne
May 13 '12 at 12:36
@TheOne, where are you getting that? f.r...
Are inline virtual functions really a non-sense?
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There is one category of virtual functions where it still makes sense to have them inline. Consider the following case:
class Base {
public:
inline virtual ~Base () { }
};
class Derived1 : public Base {
inline virtual ~Derived1...
C: differences between char pointer and array [duplicate]
...current scope's stack space, but that references memory elsewhere (in this one, "now is the time" is stored elsewhere in memory, commonly a string table).
Also, note that because the data belonging to the second definition (the explicit pointer) is not stored in the current scope's stack space, it ...
How to have favicon / icon set when bookmarklet dragged to toolbar?
...I don't get this. When you drag a bookmarklet to your favourites bar (like one does with the Delicious bookmarklet here) what runs this code? I don't see why the bookmarklet would be clicked (and the code run) until after it's saved to the favourites bar, i.e. after the browser has settled on its ic...
How do you do a limit query in JPQL or HQL?
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I like this one best because setFirstResult is actually mentioned in this answer whereas here and elsewhere they just say setMaxResults this and setMaxResults that without mentioning how to set the offset.
– demongo...
Apache Tomcat Not Showing in Eclipse Server Runtime Environments
...th" drop-down.
Select "Web Tools Platform (WTP)" and "Project Provided Components".
Complete all the installation steps and restart Eclipse. You'll see a bunch of servers when you try to add a server runtime environment.
s...
Generate random 5 characters string
...reach (array_rand($seed, 5) as $k) $rand .= $seed[$k];
Example
And, for one based on the clock (fewer collisions since it's incremental):
function incrementalHash($len = 5){
$charset = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
$base = strlen($charset);
$result = '';...