validate_email_address.js

/**
 * Validate an email address.
 */
var validate_email_address = function(email_address) {
    // TODO: This does not support using "+" in email addresses and it also seems
    //       to assume that the top level domain can only be three characters long.
    //       I coped this from somewhere.  Need to revisit it.  It works as a quick
    //       rule of thumb to reduce the amount of work that needs to be done by
    //       hand for the task at hand today.
    if (/.+@.+\..+/i.test(email_address)) {
        return(true);
    } else {
        return(false);
    }
}

// Take an email address as command line parameter and log whether it's valid or not.
var email_address = process.argv[2];
if (validate_email_address(email_address)) {
    console.log('valid: %s', email_address);
} else {
    console.log('not valid: %s', email_address);
}

bro