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welcome to the tow vehicle this course covers cleaning the car number to remove spaces and dashes specifically we will learn how to map one observables value to another observables value our goal here is to allow the user to type a card number with spaces and dashes but we want to print out a cleaned up version of that card number without those spaces and dashes notice here as weamp;#39;re typing the card number doesnamp;#39;t have the spaces or dashes we will do this by creating a card number observable on app component that observable will emit the values of user card number but without those spaces or dashes to do this we will have to create a clean card number rxjs operator that mapamp;#39;s the user card number with spaces and dashes to a card number observable without spaces and dashes finally we will write out the value of the cleaned-up card number after the form as is shown here okay so letamp;#39;s talk about what you need to know to solve this problem and the first thing
