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Are static class variables possible in Python?
... if it's a subclass. A static method lacks this information, so it cannot call an overridden method, for example.
– Seb
Oct 2 '12 at 15:58
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How to check if a value exists in a dictionary (python)
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it wasn't necesarry after all, unless run on bigger dict. I guess overhead in values() is caused by copying the value list and in viewvalues() by maintaining the view alive.
– soulcheck
Nov 21 '11 at 17:12
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How to wait for several Futures?
...ave several futures and need to wait until either any of them fails or all of them succeed.
8 Answers
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Captured variable in a loop in C#
...ompiler is generating a class that represents the closure for your method call. It uses that single instance of the closure class for each iteration of the loop. The code looks something like this, which makes it easier to see why the bug happens:
void Main()
{
List<Func<int>> actio...
Export database schema into SQL file
... Generate Scripts
When generating the scripts, there is an area that will allow you to script, constraints, keys, etc. From SQL Server 2008 R2 there is an Advanced Option under scripting:
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How to join two sets in one line without using “|”
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320
You can use union method for sets: set.union(other_set)
Note that it returns a new set i.e it...
Java SimpleDateFormat(“yyyy-MM-dd'T'HH:mm:ss'Z'”) gives timezone as IST
...ng??
– Pradip Borde
Oct 1 '13 at 10:32
-0700 is the time zone ie -7:00 Hrs
– Subir Kumar Sao
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How should one use std::optional?
...std::string s, int& i);
Another way that this could be done is especially bad:
int* try_parse_int(std::string s); //return nullptr if fail
This requires dynamic memory allocation, worrying about ownership, etc. - always prefer one of the other two signatures above.
Another example:
clas...
How do I do base64 encoding on iOS?
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A really, really fast implementation which was ported (and modified/improved) from the PHP Core library into native Objective-C code is available in the QSStrings Class from the QSUtilities Library. I did a quick benchmark: a 5....
How to parse unix timestamp to time.Time
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Changed from strconv.Atoi to strconv.ParseInt to avoid int overflows on 32 bit systems.
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