Consider the following VBA function: Function getFirstColumn(Optional sheetName As String) As Long 'In particular the IF statement below. If sheetName = "" Or sheetName = Null Then sheetName = ActiveWorkbook.ActiveSheet.Name With ActiveWorkbook.

Is there any difference between using "!= NULL" and using "IS NOT NULL"? For example: SELECT * FROM tbl_example WHERE a_field IS NOT NULL and SELECT * FROM tbl_example WHERE a_field != NULLYes, there is. != does not work properly with

This question already has an answer here: Why cast null to Object? 4 answers Take a look at the following example: class nul { public static void main (String[] args) { System.out.println (String.valueOf((Object)null)); System.out.println (String.val

What is the difference between .operator=(std::initializer_list<T>) and .assign(std::initializer_list<T>) in the std::vector class? Do they do the same? http://en.cppreference.com/w/cpp/container/vector/operator%3D http://en.cppreference.com/w

This question already has an answer here: In this specific case, is there a difference between using a member initializer list and assigning values in a constructor? 11 answers Is there a difference between Demo1 and Demo2 in the following code? #inc

Is there any difference between #include "./test.h" and #include "test.h" for the C/C++ preprocessor?No, there is no difference. You could also have #include "../thisdir/test.h" And it would be the same

My website looks perfect on the iPhone but looks sub-optimal on the iPad. I'm having a lot of trouble finding information on the differences between iPad's webkit/safari rendering engine and iPhones' webkit/safari rendering engine. If you don't belie

but I learn programming and after structured programming with Pascal language, I'm beginning to learn about OOP with Delphi. So, I don't really understand the difference between the strict private instruction and the protected one.. So here is my cod

I just want to know the difference between: sort < output and sort output in Linux. How does it work exactly?This has been discussed on unix.stackexchange here: Performance difference between stdin and command line argument In sort < file the shell

If you want background, see here. In short, the question is: "What's actual difference between bracket (mallocBytes n) free and allocaBytes from Foreign.Marshall.Alloc". Normally in C, alloca allocates on stack and malloc allocates on heap. I'm

I am reading a book for Java that I am trying to learn, and I have a question. I can't understand what is the difference between the variable type char and String. For example, there is a difference between int and short, the bytes at the memory and

I am using requireJS 2.x. I found out that some tutorials (and the official docs) sometimes use requirejs.config({ [...] }); requirejs(["module"]) ... and sometimes require.config({ [...] }); require(["module"]) ... Is there any differ

What is the difference between Microsoft Office Developer Tools and Visual Studio Tools for Office aka VSTO? When I install the capability below, exactly which one of those two technologies am I using? TIA.Visual Studio Tools for Office (or VSTO) is

I am not quite sure about the difference among the console (in "windows console application"), cmd.exe, a shell. I know cmd.exe is a stand-alone process when running, is cmd.exe == shell ? So shell is just a process? is console == cmd.exe? MSDN

I have been always using a != null to check that a is not a null reference. But now I've met another way used: a.ne(null) what way is better and how are they different?Like @Jack said x ne null is equal to !(x eq null). The difference between x != nu