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What is the most efficient string concatenation method in python?
... Guido. Although it is worth remembering also that this is an old article and it predates the existence of things like ''.join (although I guess string.joinfields is more-or-less the same)
On the strength of that, the array module may be fastest if you can shoehorn your problem into it. But ''.jo...
JavaScript function to add X months to a date
...hs to a date in JavaScript (source). It takes into account year roll-overs and varying month lengths:
function addMonths(date, months) {
var d = date.getDate();
date.setMonth(date.getMonth() + +months);
if (date.getDate() != d) {
date.setDate(0);
}
return date;
...
How to print last two columns using awk
...
Try and see. It does work Solaris 9 awk & nawk. The alternative is $(NF-1)
– jim mcnamara
Nov 29 '10 at 15:04
...
Update statement with inner join on Oracle
... WHERE table1.value = table2.DESC)
WHERE table1.UPDATETYPE='blah'
AND EXISTS (SELECT table2.CODE
FROM table2
WHERE table1.value = table2.DESC);
Or you might be able to do this:
UPDATE
(SELECT table1.value as OLD, table2.CODE as NEW
FROM table1
INNER JOIN table...
Copy constructor for a class with unique_ptr
... make the class moveable, but not copyable. If you leave out the copy-ctor and copy-assignment, the compiler will guide your way on how to use a std::vector with move-only types.
share
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improve thi...
Why does the C++ STL not provide any “tree” containers?
Why does the C++ STL not provide any "tree" containers, and what's the best thing to use instead?
14 Answers
...
git pull VS git fetch Vs git rebase
...on that you're actually just asking about the difference between git merge and git rebase.
So let's suppose you're in the common case - you've done some work on your master branch, and you pull from origin's, which also has done some work. After the fetch, things look like this:
- o - o - o - H -...
Count the number of occurrences of a string in a VARCHAR field?
...wesome, just what I needed! But note, that LENGTH() is not multi-byte safe and you might run into strange errors. Use CHAR_LENGTH() instead:)
– nico gawenda
Apr 29 '13 at 23:28
1
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How to check that an element is in a std::set?
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this is specific for sets and maps. vectors, lists etc. don't have a find member function.
– wilhelmtell
Nov 9 '09 at 13:53
11
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Why do Lua arrays(tables) start at 1 instead of 0?
I don't understand the rationale behind the decision of this part of Lua. Why does indexing start at 1? I have read (as many others did) this great paper . It seems to me a strange corner of a language that is very pleasant to learn and program. Don't get me wrong, Lua is just great but there has t...