default-value

If I create a vector like vector<myClass> v(10); what is the default value of each element? Also, what if it is a vector<myUnion> v(10) ? The constructor of std::vector<> that you are using when you declare your vector as vector<myClass> v(10); actually has more than one parameter. It has three parameters: initial size (that you specified as 10), the initial value for new elements and the allocator value. explicit vector(size_type n, const T& value = T(), const Allocator& = Allocator()); The second and the third parameters have default arguments, which is why you were are able to omit them in

I am learning matplotlib at the moment and working on changing the rcParams. The documentation on the website appears to be very sparse. When I look here , there is only a select few examples of rc parameters that can be changed, mainly fonts or line colors, such as: rcParams['lines.linewidth'] = 2 rcParams['lines.color'] = 'r' And so forth. I am looking for ways to alter the grid and default figure size for example, but they are not listed here and are only scattered here and there across the web. I want to find a reference list of all the changeable parameters and their descriptions. Does

Here it is my stored procedure: ALTER proc [dbo].[allrecp] @peid int=0, @pename varchar(20)='', @pdes varchar(20)='', @pdoj date='1111-1-1', @sal money=0, @dept int=0, @loc int=0,@i int=0 as begin if(@i=1) begin insert into Employee values(@pename,@pdes,@pdoj,@sal,@dept,@loc) end if(@i=2) begin update Employee set ENAME=@pename,DESEGNATION=@pdes,DOJ=@pdoj,SALARY=@sal,DEPTID=@dept,LOCATIONID=@loc WHERE EMPID=@peid end if(@i=3) delete EMPLOYEE where EMPID=@peid end And my c# code is: private void btndelete_Click(object sender, EventArgs e) { parameteres(3); } private void btnupdate_Click(object

I know I could do this better with std::vector , but the application I am messing with, has already a bunch of CArray parameters on a lot of related functions ... and I will not change them all at the moment! I simply want to define an empty CArray<CClass*> — array of pointers to CClass , so the problem can not be on the CClass constructor — as the default value of a function parameter. Approach 1 If I try to do it with assignment operator and default constructor : void Function(CArray<CClass*> parameter = CArray<CClass*>()); I get the error: 1>C:\Program Files (x86)\Microsoft Visual Studio 10

I am trying to set default value to a variable within the function in parameter list but getting an error: ERROR: input parameters after one with a default value must also have defaults Example: Create or replace function test(name varchar default null , city varchar default null , phonenumber varchar(20) default null , out sno bigint, address varchar) returns void as $$ Declare phonenumber AS VarChar(20); Begin phonenumber : =phonenumber; SELECT sno = MAX(ssno)+1 FROM emp; IF(sno IS NULL) then sno=IDENT_CURRENT('emp')+1; end; raise info '%',name; raise info '%',city; raise info '%'

I have the following: [DataContract] public class Foo { [DataMember(EmitDefaultValue = true) public bool Bar { get; set; } } 2 Questions: What really happens here because my bool can't really be null, so if I emit the default value then what? How do I make it so that if someone passes a message without the Bar part then it my server sets it to true instead of false by default? Basically, my bar member is not required to be transmitted over the soap message and if it isn't I want it to default to true, not false. I'm not sure of the proper combination to make my message sizes efficient (cut out

I have a select field that have have present options and I have a php script check a mysql database and add a select tag to the one currently being used. I need to find a way to know if the user have changed the select field or not before submitting it. var Access = document.forms[UIDF]["Access"].value; var DAccess = document.forms[UIDF]["Access"].defaultIndex; <--- This is my problem. I just need to know how to get the selected option value as this keep changing with every user <select name="Access"> <option value="0" selected='selected'>Employee</option> <option value="1">Team Leader</option