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How do I know if a generator is empty from the start?
... @S.Lott you don't need to generate the entire sequence to know if the sequence is empty or not. One element's worth of storage is sufficient - see my answer.
– Mark Ransom
Jun 13 '14 at 6:34
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Does using “new” on a struct allocate it on the heap or stack?
...ocation.
Thirdly, I'm ignoring generics, mostly because I don't actually know the answer, and partly because it would complicate things too much.
Finally, all of this is just with the current implementation. The C# spec doesn't specify much of this - it's effectively an implementation detail. Ther...
How do you install Boost on MacOS?
How do you install Boost on MacOS?
Right now I can't find bjam for the Mac.
10 Answers
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Do I set properties to nil in dealloc when using ARC?
I am trying to learn Automatic Reference Counting in iOS 5. Now the first part of this question should be easy:
2 Answers
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Can't get Gulp to run: cannot find module 'gulp-util'
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So with a 150K views on this question alone, I'd love to know what the root cause of this is... This occurs quite frequently for me and I'm guessing I'm not the only one. This adds up to a lot of wasted time!
– cloakedninjas
Jul 7 '17 at 9:41
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Possibility of duplicate Mongo ObjectId's being generated in two different collections?
...ee possibilities can occur where you won't get a unique ID (please let me know if there are more):
Before this discussion, recall that the BSON Object ID consists of:
[4 bytes seconds since epoch, 3 bytes machine hash, 2 bytes process ID, 3 bytes counter]
Here are the three possibilities, so you ...
Get nth character of a string in Swift programming language
... Note: This answer has been already edited, it is properly implemented and now works for substrings as well. Just make sure to use a valid range to avoid crashing when subscripting your StringProtocol type. For subscripting with a range that won't crash with out of range values you can use this impl...
Sort a list by multiple attributes?
...th sort on 2 criteria and use reverse=True. In case someone else wants to know how, you can wrap your criteria (functions) in parenthesis:
s = sorted(my_list, key=lambda i: ( criteria_1(i), criteria_2(i) ), reverse=True)
s...
What does `:_*` (colon underscore star) do in Scala?
...s taken as single arg
f(x:_*) // 2 as x is "unpacked" as a Seq[Any]*
So now we know what :_* do is to tell compiler : please unpack this argument and bind those elements to the vararg parameter in function call rather than take the x as a single argument .
So in a nutshell, the :_* is to remove ...
How do I check if a variable exists?
I want to check if a variable exists. Now I'm doing something like this:
11 Answers
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