parameter-passing

问题 I have an executable program that runs in several pc's in a network. At first it gets the host name (pc-001.. pc-013 etc). Then i need to mount a network drive (server1) on even pc's and (server2) on odds one based on its host name. My problem is that i use system call to run dos command 'net use' for example system ("net use x: \\\\server1\\shares /user:username pass"); How can i pass a variable to username? username is the host name which i know its value and pass is the same for all

问题 I'm having some trouble with some code in Visual C# for Windows Phone The trouble is not that it does not work, because it does, but I don't understand how =P Within a static class, a static method is created, which gives itself as a parameter: public static void MethodONe( this Timeline animation ) { //this class does not extend the TimeLine class, and is not connected to it in any //such way. animation.MethodTwo( ); } public static void MethodTwo( this Timeline animation ) { someCode( ); }

问题 I have a [WebMethod] Sendemail This works fine but now i what to upgrade it to send attachments. I am using a fileupload. This is my method Call. lblEmailSent.Text = Send.Sendemail(txtTo.Text, txtSubject.Text, txtbody.Text, FileUpload1.PostedFile.FileName, FileUpload1.FileContent); My Call Statement is underlined in blue and the two error given look like: * 1) *The best overloaded method match for 'WebTestServiceApp.localhost.Service1.Sendemail(string, string, string, string,

问题 I am well aware that modifying a function's argument that is passed by value is ineffective outside of the C/C++ function, but compilers allow it - but what happens? Is a local copy made of the argument and that is modifiable within the function? #include <stdio.h> void doSomething( int x ) { x = 42; printf( "The answer to Life, the Universe and Everything is (always): %i!\n", x ); } int main( int argc, char **argv ) { int a = 0; doSomething( a ); return -a; } Now this always exits without

问题 if I have some code like this: def handler(self): self.run(self.connect) def connect(self, param): #do stuff... def run(self, connector): self.runner = connector What's evaluated first when I call self.run(self.connect)? run with the stuff in connect already done? or connect with self.connect yet to be evaluated? 回答1: Passing a function as a parameter does not call it: In [105]: def f1(f): .....: print 'hi' .....: return f .....: In [106]: def f2(): .....: print 'hello' .....: In [107]: f1(f2

问题 I am not quiet sure about the concept of "passing by value" and "passing by reference" in c#. I think Passing by value mean : int i = 9; we pass int i into a method like: method(i) Passing by reference means exactly passing its location like : Class.method.variable and it will give out the value. Can anybody help me out?? 回答1: In simple terms... "Passing by value" means that you pass the actual value of the variable into the function. So, in your example, it would pass the value 9. "Passing

问题 In PowerShell one can define C# code and execute it. Passing in $null into the following simplest function shows that not null gets passed into the function Add-Type -TypeDefinition @" public static class foo { public static void fooo(string a) { if(a!=null) { System.Console.WriteLine("Not Null. Is '" + a + "'"); } } } "@ -Language CSharp Calling it as follows leads to the output Not Null. Is ''. This shows that $null was not null in C#. Methods like 'IsNullOrEmpty' or 'IsNullOrWhiteSpace'

问题 I declared a variable outside the function like this: var s: Int = 0 passed it such as this: def function(s: Int): Boolean={ s += 1 return true } but the error lines wont go away under the "s +=" for the life of me. I tried everything. I am new to Scala btw. 回答1: First of all, I will repeat my words of caution: solution below is both obscure and inefficient , if it possible try to stick with val ues. implicit class MutableInt(var value: Int) { def inc() = { value+=1 } } def function(s:

问题 I declared a variable outside the function like this: var s: Int = 0 passed it such as this: def function(s: Int): Boolean={ s += 1 return true } but the error lines wont go away under the "s +=" for the life of me. I tried everything. I am new to Scala btw. 回答1: First of all, I will repeat my words of caution: solution below is both obscure and inefficient , if it possible try to stick with val ues. implicit class MutableInt(var value: Int) { def inc() = { value+=1 } } def function(s:

问题 I'm using Jenkins for testing/build purposes, so I created a MultiJob project with this configuration: Test Job Build Job Install Job The MultiJob is launched from the Master Jenkins, but other jobs are launched from other Nodes. The Build Job executes a shell script which creates the BUILD_ID. Now, I want the BUILD_ID to be passed as parameter to the Install Job. How can I do that? My only choice is to use a property file? Thanks a lot 回答1: To use the suggestion i am going to describe, you