How do I check if a string is nil in Ruby?

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How do I check if a string is nil?


  1. Get the String to be checked in str.
  2. We can simply compare the string with Null using == relational operator. Syntax: if(str == null)
  3. Print true if the above condition is true. Else print false.

Is empty string null in Ruby?

# nil? can be used on any Ruby object. It returns true only if the object is nil. # empty? can be used on some Ruby objects including Arrays, Hashes and Strings. It returns true only if the object’s length is zero.

How do you check if something is null in Ruby?

You can check if an object is nil (null) by calling present? or blank? . @object. present? this will return false if the project is an empty string or nil .

How do you use nil in Ruby?

#nil? is a Ruby method on the Object class. Since all classes inherit from this class, #nil? can be used on any object. It returns true for nil (an instance of the class NilClass ) and false for everything else.

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Is null nil in Ruby?

The word “null” is used as an adjective meaning “empty”, as in “the null list,” which is nil. Meanwhile, “null” is traditionally a pointer value in C that signifies the pointer doesn’t point to anything valid.

What is nil in Ruby?

In Ruby, nil is a special value that denotes the absence of any value. Nil is an object of NilClass. nil is Ruby’s way of referring to nothing or void.