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How can I tell PyCharm what type a parameter is expected to be?
...
Yes, you can use special documentation format for methods and their parameters so that PyCharm can know the type. Recent PyCharm version supports most common doc formats.
For example, PyCharm extracts types from @param style comments.
See also reStructuredText a...
Using custom std::set comparator
...icating whether the element passed as first argument is considered to go before the second in the specific strict weak ordering it defines.
Online demo
2. Modern C++11 solution
auto cmp = [](int a, int b) { return ... };
std::set<int, decltype(cmp)> s(cmp);
Before C++20 we need to pass la...
Django admin: how to sort by one of the custom list_display fields that has no database field
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def get_queryset(self, request):
# def queryset(self, request): # For Django <1.6
qs = super(CustomerAdmin, self).get_queryset(request)
# qs = super(CustomerAdmin, self).queryset(request) # For Django <1.6
qs = qs.annotate(models.Count('order'))
return ...
Is there a generator version of `string.split()` in Python?
...y minimal memory overhead.
def split_iter(string):
return (x.group(0) for x in re.finditer(r"[A-Za-z']+", string))
Demo:
>>> list( split_iter("A programmer's RegEx test.") )
['A', "programmer's", 'RegEx', 'test']
edit: I have just confirmed that this takes constant memory in pytho...
MongoDB SELECT COUNT GROUP BY
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pls help if you can for related questions in mongoDB - stackoverflow.com/questions/61067856/…
– newdeveloper
Apr 7 at 1:48
...
How to force link from iframe to be opened in the parent window
... @Wilf I was not quite correct: ;) <base target> should come before any <a href>, since it sets the default browsing context for following links; <base href> should come before any URL reference (<* href> <* src> <form action> <object data>…) since i...
How should I validate an e-mail address?
What's a good technique for validating an e-mail address (e.g. from a user input field) in Android? org.apache.commons.validator.routines.EmailValidator doesn't seem to be available. Are there any other libraries doing this which are included in Android already or would I have to use RegExp?
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What's the cause of this FatalExecutionEngineError in .NET 4.5 beta? [closed]
...T bug existed in .NET 4.0, but was uncovered by the change in the compiler for .NET 4.5.
I do not think that beforefieldinit is the only issue here. I think it's simpler than that.
The type System.String in mscorlib.dll from .NET 4.0 contains a static constructor:
.method private hidebysig speci...
C++实现一款简单完整的聊天室服务器+客户端 - C/C++ - 清泛网 - 专注C/C++及内核技术
...stroyed./n");
}
int Clients::Search(int sock){
int index = -1;
for(int i=0; i<clientCount; i++) {
if(client[i].sock==sock){
index = i;
break;
}
}
return index;
}
int Clients::IPtoString(unsigned long ip,char *buf,int buflen){
unsigned char *p = ...
Efficiently updating database using SQLAlchemy ORM
...tements don't affect the objects that are in your session.
So if you say
for c in session.query(Stuff).all():
c.foo = c.foo+1
session.commit()
it will do what it says, go fetch all the objects from the database, modify all the objects and then when it's time to flush the changes to the datab...