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How can I return pivot table output in MySQL?
... from there in here (even more since I just don't want to copy their vast knowledge), but I'll give some advice on how to deal with pivot tables the sql way generally with the example from peku who asked the question in the first place.
Maybe the link comes back soon, I'll keep an eye out for it.
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One SVN repository or many?
...t and branching in the one-repository-multiple-projects setup? I'm working now with a company that has many projects in one repository, each with its own /project/<trunk><branch><tags> folder system. But the engineers have been checking out all projects at once from the root direct...
What is the aspnet_client folder for under the IIS structure?
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Even if you are now out of the .Net 1.1 days you can use Crystal Reports, that unfortunately still use mentioned folder (and probably there is also other software with same behavior). So, at least, make backup before deleting the folder
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Is there a good reason I see VARCHAR(255) used so often (as opposed to another length)?
...ve to use its "utf8mb4" encoding. But people are much more likely to not know that and go with "utf8", and much more likely to want UTF-8 than any other encoding, so, presto, they wind up with a maximum indexable length of 255 characters in a VARCHAR. Your astoundment notwithstanding.
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System.Timers.Timer vs System.Threading.Timer
...at the time I made the comment this answer had almost no detail. Since it now has the detail I was inquiring about, I deleted my comment.
– Taegost
Dec 19 '16 at 14:14
1
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Are duplicate keys allowed in the definition of binary search trees?
...se problems. Imagine your tree rule is this:
left < root <= right
Now imagine a simple tree whose root is 5, left child is nil, and right child is 5. If you do a left rotation on the root you end up with a 5 in the left child and a 5 in the root with the right child being nil. Now somethi...
Adding an identity to an existing column
...archar(10)
);
ALTER TABLE Test SWITCH TO Test2;
-- drop the original (now empty) table
DROP TABLE Test;
-- rename new table to old table's name
EXEC sp_rename 'Test2','Test';
-- update the identity seed
DBCC CHECKIDENT('Test');
-- see same records
SELECT * FROM Test;
This is obviou...
Arrays, heap and stack and value types
... │
16 └───────────────────┘
Now if you had three local variables in a function, of types RefType, ValType, and int[], like this:
RefType refType;
ValType valType;
int[] intArray;
then your stack might look like this:
0 ┌───────...
How can I validate a string to only allow alphanumeric characters in it?
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I detest regular expressions. I know that I will never remember the syntax. Even if I study it, there will come a time soon when it's all forgotten again.
– Sentinel
Jan 14 '15 at 17:26
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How to document Python code with doxygen [closed]
...f Doxygen and unify the documentation system in Sphinx. Awesome in theory. Now, in practice, the last time I checked the project wasn't ready for production.
pydoctor*: Very particular. Generates its own output. It has some basic integration with Sphinx, and some nice features.
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