Does ruby have operator overloading?

Does ruby have operator overloading?

Ruby permits operator overloading, allowing one to define how an operator shall be used in a particular program. For example a ‘+’ operator can be define in such a way to perform subtraction instead addition and vice versa.

What is << operator in Ruby?

As a general convention, << in Ruby means “append”, i.e. it appends its argument to its receiver and then returns the receiver. So, for Array it appends the argument to the array, for String it performs string concatenation, for Set it adds the argument to the set, for IO it writes to the file descriptor, and so on.

Which of the following is Overloadable operator?

Explanation: Both arithmetic and non-arithmetic operators can be overloaded.

How do you overload an operator for a class?

1. For operator overloading to work, at least one of the operands must be a user defined class object.
2. Assignment Operator: Compiler automatically creates a default assignment operator with every class.

What does <=> mean in Ruby?

It’s a general comparison operator. It returns either a -1, 0, or +1 depending on whether its receiver is less than, equal to, or greater than its argument.

What does @variable mean in Ruby?

In Ruby, the at-sign ( @ ) before a variable name (e.g. @variable_name ) is used to create a class instance variable. These variables are: Specific to each instantiated object of the class they’re defined in (i.e. each class object instance has a separate copy of these variables).

What does === mean in Ruby?

Range. rng === obj #→ true or false. Returns true if obj is an element of the range, false otherwise.

What is function overloading and operator overloading?

Function overloading means using a single name and giving more functionality to it. Operator overloading means adding extra functionality for a certain operator. When an operator is overloaded, the operator has different meanings, which depend on the type of its operands.

What are the rules for overloading the operators?

Rules for Overloading Operators:

• Only Existing operators can be overloaded.
• The overloaded operator must have at least one operand is of user defined type.
• We cannot change the basic meaning of an operator.
• Overloaded operators follow the syntax rules of the original operators.

What does Attr_reader do in Ruby?

With attr_reader you can only read the value, but not change it. With attr_writer you can only change a value but not read it.