Set up your voicemail 

1. Press and hold the 1 key.
2. Follow the voice prompts.

For instructions concerning voicemail set up on your specific wireless device, refer to: Program the Dedicated Voicemail Number for the...

The following code checks if two lists are equal

  (define equal(lambda (x y)
      (cond((and(null? x) (null? y)) #t)
            ((and(not (null? x)) (not (null? y))) (equal (cdr x) (cdr y)))
            (else #f))))

The following code checks if a number is Even or Odd

CODE
(define (even? n)
      (if (eqv? n 0) #t
             (odd? (- n 1))))
(define (odd? n)
      (if (eqv? n 0) #f
             (even? (- n 1))))

We have all been doing email address validation for a very long time to make sure that the email is correctly formatted. This is to avoid users entering wrongly formatted email address but still they can accidentally give us a wrong email address.

Example of a correctly formatted email address but still wrong:

mailbox.does.not.exist@reddit.com [VALID email fromat but still not correct]

The following code checks if an element is a member of a list

CODE
(define (member? x y)
      (cond ((null? y) #f)
((eqv? x (car y)) #t)
             (else (member? x (cdr y)))))

RESULT
> (member_list 'd '(a x c v b))
#f
> (member? 'f  '(a s d f g h))
#t

You can use in_array function to check if a value exists in an array:

For example:

<?php

$myname = "David";

$names = array("Paul","Maria","David","Lucy","Ana");

if (in_array($myname, $names))
       echo("Welcome $myname");
else
      echo "Sorry, that is not a valid name";

?>