#operator-overloading

Resolved: Is there actually a reason why overloaded && and || don't short circuit? #it #fix #programming

Is there actually a reason why overloaded && and || don’t short circuit?

The short circuiting behaviour of the operators && and || is an amazing tool for programmers.

But why do they lose this behaviour when overloaded? I understand that operators are merely syntactic sugar for functions but the operators for boolhave this behaviour, why should it be restricted to this single type? Is there any…

Fixed Why doesn't Java offer operator overloading? #dev #it #asnwer

Why doesn’t Java offer operator overloading?

Coming from C++ to Java, the obvious unanswered question is why didn’t Java include operator overloading?

Isn’t Complex a, b, c; a = b + c; much simpler than Complex a, b, c; a=b.add(c);?

Is there a known reason for this, valid arguments for not allowing operator overloading? Is the reason arbitrary, or lost to time?

Answer: Why doesn’t Java offer…

How to: Operator Overloading with C# Extension Methods

Operator Overloading with C# Extension Methods

I’m attempting to use extension methods to add an operater overload to the C# StringBuilder class. Specifically, given StringBuilder sb, I’d like sb += "text" to become equivalent to sb.Append("text").

Here’s the syntax for creating an extension method for StringBuilder:

public static class sbExtensions { public static StringBuilder blah(this…

How to: How can I reliably get the address of an object?

How can I reliably get the address of an object?

Consider the following program:

struct ghost { // ghosts like to pretend that they don't exist ghost* operator&() const volatile { return 0; } }; int main() { ghost clyde; ghost* clydes_address = &clyde; // darn; that's not clyde's address :'( }

How do I get clyde‘s address?

I’m looking for a solution that will work equally well for all types of…

How to: How do I overload the operator in C#

How do I overload the [] operator in C#

I would like to add an operator to a class. I currently have a GetValue() method that I would like to replace with an [] operator.

class A { private List<int> values = new List<int>(); public int GetValue(int index) { return values[index]; } }

Answer: How do I overload the [] operator in C#

public int this[int key] { get { return GetValue(key); } set {…

What makes Scala’s operator overloading "good", but C++’s "bad"?

Operator overloading in C++ is considered by many to be A Bad Thing(tm), and a mistake not to be repeated in newer languages. Certainly, it was one feature specifically dropped when designing Java.

Now that I’ve started reading up on Scala, I find that it has what looks very much like operator overloading (although technically it…

How to: overloading __init__ in python

overloading __init__ in python

Let’s say I have a class that has a member called data which is a list.

I want to be able to initialize the class with, for example, a filename (which contains data to initialize the list) or with an actual list.

What’s your technique for doing this?

Do you just check the type by looking at __class__?

Is there some trick I might be missing?

I’m used to C++ where…

How to: How do I overload the square-bracket operator in C#?

How do I overload the square-bracket operator in C#?

DataGridView, for example, lets you do this:

DataGridView dgv = ...; DataGridViewCell cell = dgv[1,5];

but for the life of me I can’t find the documentation on the index/square-bracket operator. What do they call it? Where is it implemented? Can it throw? How can I do the same thing in my own classes?

ETA: Thanks for all the quick answers.…