Agoda Interview Question: Write a function to filter alphanumeric characters from string. How would you test it? Why you didn't use regular expression?

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Agoda

Write a function to filter alphanumeric characters from string. How would you test it? Why you didn't use regular expression?

Anonymous

Jan 24, 2017

I created a simple function which keeps check on ASCII values for each character to filter it out.

Anonymous

Jan 24, 2019

String s = "AZabc1253.6789/'[paz`!@#$%^&*()"; String filter = s.replaceAll("[^0-9a-zA-Z_]", ""); System.out.print(filter);