ZuluScript: Advanced Currency Example 2
<b>Example: 5 Hours in 15 Days, or 11 Hours in 30 Days, in H60</b>
<div class="h10"> </div>

<div>Initialization script:</div>
<pre>
  var hrs15 = 0, hrs30 = 0;
</pre>
<div>Loop script:</div>
<pre>
  var icao = getfieldstr("ICAO Code");
  if (strequal(icao, "H60"))
  {
    var ft = getfieldnum("Day Flight Time") +
      getfieldnum("Night Flight Time");
    hrs30 = hrs30 + ft;
    
    if (getdaysago() <= 15)
       hrs15 = hrs15 + ft; 
  
    if (hrs30 >= 11 || hrs15 >= 5)
      currency_ok = 1;
  }
</pre>

<div>How it works:</div>
First, we get the ICAO code of the aircraft associated with the flight
record; if it's "H60", we proceed with the rest of the logic. 
Next, we calculate the total flight time for the record
and add it to <code>hrs30</code>. (We'll define the period for this currency
definition as 30 days, so we know all records we see are within 30 days.)
<div class="h10"> </div>

Then, if <code>getdaysago()</code> returns 15 or less, we know the record is
within the last 15 days, so we also add the flight time to <code>hrs15</code>.
<div class="h10"> </div>

Finally, we check to see if we've accumulated either 11 hours in 
<code>hrs30</code>, or 5 hours in <code>hrs15</code>. If either of these is
true, our currency is valid.