Instructions: Copy the function you created for the second test and name it introductionWithLanguageOptional. It should have two parameters, name and language, and the second parameter should have a ...

Instructions: Copy the function you created for the second test and name it introductionWithLanguageOptional. It should have two parameters, name and language, and the second parameter should have a ...

If you write JavaScript, you have probably used higher-order functions and not even noticed. If you have ever replaced a for loop with an array method, you’ve used higher-order functions.