Frequent question: What is the difference between == and === in Ruby?

What does === mean in Ruby?

Triple Equals Operator (More Than Equality)

Ruby is calling the === method here on the class. Like this: String === “bacon” This compares the current class with the other object’s class. So the point of this operator is to define equality in the context of a case statement.

What is the use of == === operators?

The strict equality operator ( === ) checks whether its two operands are equal, returning a Boolean result. Unlike the equality operator, the strict equality operator always considers operands of different types to be different.

How do you check if two strings are equal in Ruby?

eql? is a String class method in Ruby which is used to check whether the strings are equal or not if they have the same length and content. Parameters: Here, str and other_str are the strings. Returns: True or false basis on the equality.

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What’s the difference between || and or in Ruby?

In Ruby, “or” keyword returns the logical disjunction of its two operands. The condition becomes true if both the operands are true. This keyword is an equivalent of || logical operator in Ruby, but with lower precedence. …

What is unless in Ruby?

Ruby provides a special statement which is referred as unless statement. This statement is executed when the given condition is false. … In if statement, the block executes once the given condition is true, however in unless statement, the block of code executes once the given condition is false.

Which is better Python or Ruby?

Python is faster than Ruby, but they’re both in a category of interpreted languages. Your fastest language is always going to be one that’s compiled down to byte code or object code right on the computer. Both Ruby and Python exist a level above that, they’re abstracted.

What is == in programming?

In programming languages == sign or double equal sign means we are comparing right side with left side. And this comparison returns true or false. We usually use this comparison inside if condition to do something specific. Double equal operator is a very common used operator after single equal.

What is the difference between === and == operators?

In one word, main difference between “==” and “===” operator is that formerly compares variable by making type correction e.g. if you compare a number with a string with numeric literal, == allows that, but === doesn’t allow that, because it not only checks the value but also type of two variable, if two variables are …

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What is the meaning of &&?

The && (logical AND) operator indicates whether both operands are true. If both operands have nonzero values, the result has the value 1 . Otherwise, the result has the value 0 .

How do you use equal in Ruby?

The == operator, also known as equality or double equal, will return true if both objects are equal and false if they are not. When comparing numbers of different types (e.g., integer and float), if their numeric value is the same, == will return true.

Is nil a Ruby?

true, false and nil are built-in data types of Ruby. Note: Always remember in Ruby true, false, and nil are objects, not numbers. Whenever Ruby requires a Boolean value, then nil behaves like false and values other than nil or false behave like true.

What is return in Ruby?

Explicit return

Ruby provides a keyword that allows the developer to explicitly stop the execution flow of a method and return a specific value. … The return keyword returns nil if no value is passed as argument.

Can you use and in Ruby?

The and and or keywords serve the same purpose in Ruby. Properly understood, and and or are control flow operators, not boolean operators.

What is the difference between && || operators AND and OR?

length() would not be invoked on a null string. && is used to perform and operation means if anyone of the expression/condition evaluates to false whole thing is false. || is used to perform or operation if anyone of the expression/condition evaluates to true whole thing becomes true.

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How do you use the OR operator in Ruby?

Using “or” is an alternate for || operator. For example, a || b returns true if one of a or b is true (i.e. non-zero). Of course, it returns true when both a and b are true.