object-comparison

Why is my comparing if statement not working?

Why is the following code (in cocoa) not working? NSString *extension = [fileName pathExtension]; NSString *wantedExtension = @"mp3"; if(extension == wantedExtension){ //work } in Xcode this just runs without warnings or errors but doesn't do what I think it SHOULD do. ...

Object comparison in JavaScript

What is the best way to compare Objects in JavaScript? Example: var user1 = {name : "nerd", org: "dev"}; var user2 = {name : "nerd", org: "dev"}; var eq = user1 == user2; alert(eq); // gives false I know that "Two objects are equal if they refer to the exact same Object", but is there a way to check it another way?? Using this way w...

What happens when you compare two objects?

If I wrote an operator == for class Foo (in C++), what happens, exactly? Does it compare each data member against each other? class Foo { private: int bar; public: bool operator==(const Foo other&) { return *this == other; //what? //is this the same as bar == bar? } } ...

How do I compare two Integers?

This sounds like a stupid question, but I'm kinda stuck here. I have to compare two Integer (not int). How do I compare them? Integer x = ... Integer y = ... I can think of this: if (x == y) The == operator only compares references, so this will only work for lower integer values. But perhaps auto-boxing kicks in...? if (x.equals...

How can I write custom comparison (definition for binary operator Equal) for entityframework object to an int?

I'm getting this error: ex = {"The binary operator Equal is not defined for the types 'MySite.Domain.DomainModel.EntityFramework.NickName' and 'System.Int32'."} What I tried to do was do a select all where the NickNameId = someIntPassedIn... the problem is that the NickNameId is a foreign key, so when it compares the someIntPassedI...