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std::back_inserter for a std::set?
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set doesn't have push_back bem>ca m>use the position of an element is determined by the comparator of the set. Use std::inserter and pass it .begin():
std::set<int> s1, s2;
s1 = getAnExcitingSet();
transform(s1.begin(), s1.end(),
std::insert...
ApartmentState for dummies
...mpletely skips is providing threading guarantees for a class. A COM class m>ca m>n publish what kind of threading requirements it has. And the COM infrastructure makes sure those requirements are met.
This is completely absent in .NET. You m>ca m>n use a Queue<> object for example in multiple thread...
how to generate migration to make references polymorphic
...I'm not mistaken, you do need to add them yourselves if you need them. You m>ca m>n just add indexes as normal in the migration file to imageable_type and/or imageable_id as necessary.
– Michelle Tilley
Apr 20 '14 at 18:23
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WebSocket with SSL
...th an HTTP or HTTPS handshake. When the page is accessed through HTTP, you m>ca m>n use WS or WSS (WebSocket secure: WS over TLS) . However, when your page is loaded through HTTPS, you m>ca m>n only use WSS - browsers don't allow to "downgrade" security.
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Python using enumerate inside list comprehension
...o work. Alternatively, given that enumerate() already returns a tuple, you m>ca m>n return it directly without unpacking it first:
[pair for pair in enumerate(mylist)]
Either way, the result that gets returned is as expected:
> [(0, 'a'), (1, 'b'), (2, 'c'), (3, 'd')]
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What does the arrow operator, '->', do in Java?
While hunting through some code I m>ca m>me across the arrow operator, what exactly does it do? I thought Java did not have an arrow operator.
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Declaring an enum within a class
In the following code snippet, the Color enum is declared within the m>Ca m>r class in order to limit the scope of the enum and to try not to "pollute" the global namespace.
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What is pseudopolynomial time? How does it differ from polynomial time?
...problem of testing whether a number is prime or not. Given a number n, you m>ca m>n test if n is prime using the following algorithm:
function isPrime(n):
for i from 2 to n - 1:
if (n mod i) = 0, return false
return true
So what's the time complexity of this code? Well, that inner loop...
How to drop into REPL (Read, Eval, Print, Loop) from Python code
Is there a way to programmatim>ca m>lly force a Python script to drop into a REPL at an arbitrary point in its execution, even if the script was launched from the command line?
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How to count occurrences of a column value efficiently in SQL?
... for the second query, the outer select should be on C.cnt bem>ca m>use there is no S.cnt, otherwise you get an error: Invalid column name 'cnt'
– KM.
Oct 1 '09 at 14:00
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