default-value

The following code compiles and works as expected. #include <vector> void function(std::vector<int> vec, int size=1); int main(){ std::vector<int> vec = {1,2,3}; function(vec); } void function(std::vector<int> vec, int size){ //code.. return; } However, I would like the size parameter's default value to be deduced based on a previous parameter. So for example: void function(std::vector<int> vec, int size=vec.size()); But this however results in: error: local variable ‘vec’ may not appear in this context Which doesn't surprise me; I assume it needs to know the default value at compile time. So

hey, im trying to add data to my sqlserver by using Linq To Sql, in the table, the data design to get NEWID() when new row is inserted, but the linq to sql ignore it and the cell in null, thanks! It sounds like you're expecting a guid value to be auto-generated for you right at the time of insert. It sounds like that column has a DEFAULT of NewID() . In your LINQ To SQL model, navigate to the table's property whose value is auto-generated. Right-click, Properties, and ensure the attribute Auto Generated Value is set to True. This will ensure the INSERT statement generated doesn't include a

I'm trying to write a generic cached property accessor like the following but am getting a compiler error when trying to check whether the storage variable already contains a value: function TMyClass.GetProp<T>(var ADataValue: T; const ARetriever: TFunc<T>): T; begin if ADataValue = Default(T) then // <-- compiler error on this line ADataValue := ARetriever(); Result := ADataValue; end; The error I'm getting is "E2015 Operator not applicable to this operand type". Would I have to put a constraint on T to make this work? The help file says that Default() would accept anything except generic

Hi, According to this link the default values of WCF 4.0 is this : MaxConcurrentSessions: 16 * processorcount MaxConcurrentSessions: MaxConcurrentCalls + MaxConcurrentSessions 100 * processorcount MaxConcurrentSessions: 100 * processorcount I know, not that clear. When looking in the documentation at MSDN( WCF 4.0 ) it says this : maxConcurrentCalls : 16 maxConcurrentInstances : 26 maxConcurrentSessions : 10 If I however look at the WCF 4.5 some of the values is based on CPU like the first example maxConcurrentCalls : 16 times the processor count maxConcurrentInstances : The default is the sum

Just playing around a little with C++. What I really want to do is to be able to setup a function with default values defined for an array or pointer argument. To keep things simple, let's just use an array. Like so: void experimentA(char a[3] = {'a', 'b', 'c'}); The compiler (LLVM GCC 4.2 with GNU99) complains "Expected expression". That is quite obtuse, but I was told by colleagues that this is happening because the 'value' I'm trying to assign is statically allocated, whereas the variable I'm trying to assign it to ( a[3] ) is auto. But I'm not completely sure if that's the case, since I'm

$(".box_yazi2").each(function () { var default_value = this.value; $(this).css('color', '#555'); // this could be in the style sheet instead $(this).focus(function () { if (this.value == default_value) { this.value = ''; $(this).css('color', '#000'); } }); $(this).blur(function () { if (this.value == '') { $(this).css('color', '#555'); this.value = default_value; } }); }); This function of default value of input doesnt work in FF, but perfectly works in IE and ofcourse the input itself looks like this: <input type="text" class="box_yazi2" id="konu" name="konu" value="Boş" /> Andreas Niedermair