t-family: monospace;">Arguments: 1: Name of associative
array<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2: The key
to test<br>
Returns:&nbsp;&nbsp;&nbsp;Returns true if the key is defined (i.e. not
empty)<br>
</span>
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<h2>Named Stacks</h2>
A stack is an ordered list of strings (with no spaces in them).<br>
<br>
<hr style="width: 100%; height: 2px;"><b>push</b><br>
<br>
<span style="font-family: monospac