arrayLoop.js

let form = [
      ["input[name=email]", "trainee12@mail.com"],
      ["input[name=password]", "password"],
      ["input[name=password_confirmation]", "password"],
      ["input[name=first_name]", "John"],
      ["input[name=last_name]", "Doe"]
    ]
    
    form.forEach(element => {
      cy.get(element[0]).type(element[1]);
    });