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Definition of Ruby Require

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Syntax of Ruby Require

Below is the syntax for the require in Ruby, to explain the syntax we are taking two files, one file which will play the role of the library and another file which uses the library file by using the require statement.

We can explain the syntax of the library files first by the below steps.

Inside the library syntax, we can see that we have created two files called chúng tôi and library2.rb.

Next inside the library files we have initialized and created class and methods inside the class.

Inside initialize we will do the initialization part of the class and the method will perform our required activity. We can write some codes inside it the methods and initialize as per our requirements.

Next is our file which will use the rb and chúng tôi files which is chúng tôi These library files will allow the chúng tôi file to use all the methods and classes of the chúng tôi and chúng tôi files.

Finally, we are creating an object of class LibraryClass1 and LibraryClass2 which is available inside the chúng tôi and chúng tôi file respectively which we have required inside the rb file.

Note: We need to remember one very important point which is namespace pollution, in many cases if we will define too many global variables inside the library file. Because suppose you have defined many global variables inside the library file then there is a very high chance of a conflict of the variables from library file to the file inside which we are requiring the library file.

1. Library file (library1.rb) class LibraryClass1 def initialize #Do some initialisation for the class before calling any function of the class end def library_method1 #Here write some code for the method end End 2. Library file (library2.rb) class LibraryClass2 def initialize #Do some initialisation for the class before calling any function of the class end def library_method2 #Here write some code for the method end end 3. File which will use the Library file(use.rb) require 'library1.rb' require 'library2.rb' libraryObj1 = LibraryClass1.new libraryObj2 = LibraryClass2.new How does a Required Statement Work in Ruby?

To explain the working flow of the required statement we will take the help of the below diagram. We can explain the flow of the below diagram from the following steps.

Inside the below diagram we can see that we have created two files called chúng tôi and library2.rb.These files will play the role of the library

Next inside the library files, we have created a class and inside the class, we have methods initialized. Inside the method, we can put some logic, and inside the initialize we can put the initialization works.

Next is our file which will use the rb and chúng tôi files which is chúng tôi .These library files will allow the chúng tôi file to use all the methods and classes of the chúng tôi and chúng tôi files.

Finally, we are creating an object of class LibraryClass1 and LibraryClass2 which is available inside the rb and chúng tôi file respectively which we have required inside the chúng tôi file.

Examples to Implement Require in Ruby

To explain the below example we can follow the below steps.

In the below example we can see that we have created two files called rb and library2.rb.These files will play the role of the library

Next inside the library files, we have created a class and inside the class, we have methods initialized. Inside methods, we have written puts to print the message.

Next is our file which will use the rb and chúng tôi files which is use.rb.These library files will allow the chúng tôi file to use all the methods and classes of the chúng tôi and chúng tôi files.

Finally, we are creating an object of class LibraryClass1 and LibraryClass2 which is available inside the rb and chúng tôi file respectively which we have required inside the chúng tôi file.

Please see the below example along with the screen of the output.

File library1.rb puts "Library1" class LibraryClass1 def initialize #Do some initialisation for the class before calling any function of the class end def library_method1 puts "Welcome the library1 file , I am available for use.rb" end end File library2.rb puts "Library2" class LibraryClass2 def initialize #Do some initialisation for the class before calling any function of the class end def library_method2 puts "Welcome the library2 file , I am available for use.rb" end end File use.rb require './library1.rb' require './library2.rb' libraryObj1 = LibraryClass1.new libraryObj2 = LibraryClass2.new libraryObj1.library_method1 libraryObj2.library_method2

Conclusion

From these tutorials we learned about the basics of the requires in Ruby, we also learned about the working of the requires with help of a diagram, we came to know that we can use requires where we wanted to use the features of other files, these features may be class and method of any library files which inside our files where we required these library files.