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Equivalent C++ to Python generator pattern
... State { unsigned i, j; };
State make();
void next(State&);
bool isDone(State const&);
Of course, we wrap this as a proper class:
class PairSequence:
// (implicit aliases)
public std::iterator<
std::input_iterator_tag,
std::pair<unsigned, unsigned>
...
Tables instead of DIVs [duplicate]
... depending on how wide the window is stretched. Almost everything is best done as a div, but some tricky cases are better with a table when you consider old browsers.
– Nosredna
Jun 10 '09 at 14:21
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How to update SQLAlchemy row entry?
...ng the addition in Python using the in-place addition. If there is a race, one of the transactions will then succeed and the others will fail and must retry (with the new state of the DB). But I might've misunderstood SERIALIZABLE.
– Ilja Everilä
Sep 28 '18 at...
What's the difference between tilde(~) and caret(^) in package.json?
...4 to <3.0.0.
See Comments below for exceptions, in particular for pre-one versions, such as ^0.2.3
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How do I find the duplicates in a list and create another list with them?
...vious what not seen.add(x) is doing (the set add() method always returns None, hence the need for not).
To compute the list of duplicated elements without libraries:
seen = {}
dupes = []
for x in a:
if x not in seen:
seen[x] = 1
else:
if seen[x] == 1:
dupes.ap...
Why do access tokens expire?
...ith that token, I send it to the server, it will refresh and send me a new one. What's to stop that? Don't say IP Address or even MAC, because that's unreasonable.
– Suamere
Sep 24 '15 at 18:57
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How do I find a “gap” in running counter with SQL?
...lice it into smaller pieces and run some SQL on it). I suppose I could run one query to find the start of a gap, then another to find the end of a gap, and them "merge sort" the two sequences.
– Hamish Grubijan
May 20 '13 at 21:12
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How do I migrate a model out of one django app and into a new one?
I have a django app with four models in it. I realize now that one of these models should be in a separate app. I do have south installed for migrations, but I don't think this is something it can handle automatically. How can I migrate one of the models out of the old app into a new one?
...
Javascript equivalent of Python's zip function
...answer with variadic arguments, you may want to perf test it.)
Here's a oneliner:
function zip(arrays) {
return arrays[0].map(function(_,i){
return arrays.map(function(array){return array[i]})
});
}
// > zip([[1,2],[11,22],[111,222]])
// [[1,11,111],[2,22,222]]]
// If you be...
What is the difference between active and passive FTP?
Can someone tell me what is the difference between active and passive FTP?
Which one is preferable?
5 Answers
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