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► It must NOT have or more consecutive repeated digits. ► It must NOT use any other separator like ' ', '_', etc. ► It may have digits in groups of, separated by one hyphen " - ". You happen to be great at regex so he is asking for your help!Ī valid credit card from ABCD Bank has the following characteristics: It implements the Luhn algorithm to validate a credit card number and to determine what. He wants to verify whether his credit card numbers are valid or not. The business solution is designed in a SOA composite application that validates a credit card payment and returns a payment status. Credit Card Validator is made by using a C++ programming language. Next, you do the same thing with the digits skipped in the first step, but this time you double the value of each digit and add the value of each digit in the result. Yesterday, Fredrick received credit cards from ABCD Bank. To validate a credit card number, you start by adding the value of every other digit, starting from the right-most digit and working left. CREDIT CARD VALIDATOR JAVA HOW TONote: Here we use local or custom database to implement the logic, the same steps can be followed to implement the logic in a regular database like MongoDB or MySql.Įxample: This example illustrates how to validate an input field to only allow a valid credit card number.You and Fredrick are good friends. If error list is empty, give access to the user for the subsequent request.If error occurs redirect to the same page passing the error information.Destructure ‘validationResult’ function from express-validator to use it to find any errors.Use the validation name(validateInputField) in the routes as a middleware as an array of validations. ![]()
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