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C++ function-like value pass


By : Yogesh
Date : October 14 2020, 11:12 PM
wish helps you You just described inline functions (including the function when used rather than jump and return) and references (use the caller's variables rather than copy into the function).
Inline functions just happen automatically when you turn the optimizer on, conditions permitting. Not something to worry about.
code :


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Mixing pass-by-reference and pass-by-value to variadic template function valid?


By : es.zaki
Date : March 29 2020, 07:55 AM
around this issue What you're looking for is perfect forwarding, ie. your AllocateObject function should be completely transparent as far as copying side effects are concerned.
This involves both std::forward (as nijansen already mentioned) and the use of universal references in your parameter list:
code :
template <class T, typename... Arguments>
inline T* AllocateObject(Arguments&&... args)
//                                ^^ universal references
{
    return new (InternalAllocate(sizeof(T))) T(std::forward<Arguments>(args)...);
    //                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ forwarding
}

How can I pass call a function on a child controller from the parent and pass a parameter?


By : Jan
Date : March 29 2020, 07:55 AM
this one helps. The parent controller can notify child controller by using $broadcast.
Here is some example Live Demo:
code :
<div ng-controller="ParentCtrl">

    <a data-ng-click="callChild('x')">Click me</a>

    <div ng-controller="ChildCtrl">            

    </div>
</div>
var fessmodule = angular.module('myModule', []);

function ParentCtrl($scope, $timeout) {    

     $scope.callChild = function (val) {
       $scope.$broadcast('someEvent', val);
    };
}

function ChildCtrl($scope) { 
    $scope.$on('someEvent', function (event, val) {
        alert('from child ' + val);
    });
}

Is Passing a Dynamically Allocated Array to a Function in C an Instance of Pass-by-value or Pass-by-reference?


By : Mak Lampir
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further In C, everything is passed by value. In your concrete example arr is. You don't have references like in C++ or Java.
Let's take a C++ example:
code :
void foo(int& i) {
    ++i;
}

int main() {
    int i = 1;

    foo();
}
void foo(int* i) {
    ++*i;
}

int main() {
    int i = 1;

    foo(&i);
}

How to pass arguments to an external function that I am calling using CallInst::Create(...) in my LLVM pass?


By : P. Janikowski
Date : March 29 2020, 07:55 AM
will help you CallInst::Create needs ArrayRef < Value* > for arguments
so now when you initialized ArrayRef < Value * > arguments('c'), here as there is no inbuilt constructor to convert char 'c' to Value*
code :
ArrayRef< Value* > arguments(ConstantInt::get(Type::getInt8Ty(llvmContext), 'c'));
Instruction *newInst = CallInst::Create(hook, ArrayRef< Value* >{ConstantInt::get(Type::getInt8Ty(llvmContext), 'c')}, "");

Is it OK to pass pandas GroupBy functions as argument in python function? and how should I pass their arguments?


By : Ben Makuh
Date : March 29 2020, 07:55 AM
Hope this helps It is ok to pass anything you want, if it works and serves you well. You can pass function's agrs either as an additional dict/tuple argument, or just use *args and **kwargs.
still, it is unclear what you want to achieve here. First, It looks like you're messing with data and df in your function. Second, if I understand correctlly, pd.core.groupby.GroupBy is a class of a data-object - it is what you'll get from df.groupby, not the other way around. thus, you shouldn't use it here.
code :
def foo(df, agg='mean'):
    momentum = df.groupby('grouper').agg(agg)
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