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string c_str() vs. data()
...In C++11 onwards, both functions are required to be the same. i.e. data is now required to be null-terminated. According to cppreference: "The returned array is null-terminated, that is, data() and c_str() perform the same function."
...
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...
Why is SELECT * considered harmful?
...tables, both of which contain a column called "ID". How would a consumer know which was which? SELECT * can also confuse views (at least in some versions SQL Server) when underlying table structures change -- the view is not rebuilt, and the data which comes back can be nonsense. And the worst pa...
throw new std::exception vs throw std::exception
...m not really sure what you're asking about but it sounds like you want to know about the storage and/or lifetime of the exception object which might be answered here. If not you might be better off asking a separate question.
– CB Bailey
Apr 1 '13 at 17:09
...
Looping in a spiral
...wered Oct 12 '09 at 15:29
Tom J NowellTom J Nowell
8,0791616 gold badges5555 silver badges8888 bronze badges
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How does grep run so fast?
...ality of GREP in shell, earlier I used to use substring method in java but now I use GREP for it and it executes in a matter of seconds, it is blazingly faster than java code that I used to write.(according to my experience I might be wrong though)
...
Why is using a wild card with a Java import statement bad?
...IDE (since your argument is that I shouldn't have to use one), how will I know which package Foo came from? Sure, using an IDE, the IDE will tell me, but your entire argument is that I should be able to read the code without one. Doing explicit imports help document the code (great reason to avoid w...
Automatic prune with Git fetch or pull
If someone deleted a remote branch because the work is over and I don't know, I won't do a git fetch --prune and eventually I will push back the deleted branch.
...
How do MySQL indexes work?
...
The first thing you must know is that indexes are a way to avoid scanning the full table to obtain the result that you're looking for.
There are different kinds of indexes and they're implemented in the storage layer, so there's no standard between t...
std::next_permutation Implementation Explanation
...s to go (ie we can "increase" the permutation by a smaller amount).
Let's now go back to the code:
while (true)
{
It j = i;
--i;
if (*i < *j)
{ // ...
}
if (i == begin)
{ // ...
}
}
From the first 2 lines in the loop, j is an element and i is the element befo...