argument-passing

Even though I fear that you will tell me that this topic was covered several time, I dare to ask it, since I was not able to generate a solution. Probably I was just looking for the wrong thing... Assume that I have a function which receives a "mode" from some external function. Depending on the mode, the function will call different member functions of the same object. This works well for me with member function without any argument, but I did not find out how to extend it to members with arguments. In the real world application, the arguments are not int/float but a more complex classes and

In my pursuit of a solution to another environment-variable/batch-file related problem, I have once again come across a problem I have visited before (but cannot for the life of me remember how, or even if I solved it). Say you have two BAT files (or one batch file and the command line). How can one pass an environment variable name to the other so that it can read the variable? The following example does not work: A.BAT: @call b.bat path B.BAT: @echo %%1% > A.BAT > %1 > B.BAT path > %1 It is easy enough to pass the environment variable name, but the callee cannot seem to use it. (I don’t

A very basic question, but still, it would be good to hear from C++ gurus out there. There are two rather similar ways to declare by-reference parameters in C++. 1) Using "asterisk": void DoOne(std::wstring* iData); 2) Using "ampersand": void DoTwo(std::wstring& iData); What are implications of each method? Are there any gotcha's in any case? Bonus #1: What would be a formal way to call method in #1 and #2? Are they both called "by-reference"? Bonus #2: std::wstring is used deliberately. What would be implications towards standard library classes in each case? #1 uses a pointer parameter (

This is related to the following post Problems passing arguments with callNextMethod() in R I am writing accessors for two S4 classes, 'foo' and 'bar'. 'bar' inherits from foo and is extended only by a few slots. Instead of writing a full accessor function for objects of class 'bar' I want to pass the arguments to callNextMethod() when accessing a slot that is inherited by 'foo'. My code looks like this: foo <- setClass("foo", representation(x = "numeric", y = "numeric")) bar <- setClass("bar", representation(distance = "numeric"), contains = "foo") setMethod("[", "bar", function(x, i, j, drop

I'm writing a batch file for automating the creation of typical folder structures for products that we sell. I would like to be able to call my batch file with 2 optional arguments; the name of the supplier and a file for creating lots of folders at once. If no supplier is supplied the script asks via standard input who the supplier is. If no file is supplied the script asks for the name of the folder you wish to create. If a file is passed as an argument I would like the script to read the file line by line and create a folder for each line, named after the contents of that line. Here is the

Is it possible to pass an anonymous function as an argument, and have it execute immediately, thus passing the function's return value? function myFunction(Array $data){ print_r($data); } myFunction(function(){ $data = array( 'fruit' => 'apple', 'vegetable' => 'broccoli', 'other' => 'canned soup'); return $data; }); This throws an error due to the Array type-hint, complaining of an object being passed. Alright, if I remove the type-hint, it of course spits out Closure Object , rather than the results I want. I understand that I am technically passing an object instance of Closure to myFunction