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<div><h1>VirtualTally</h1>
<div class="single"><h2>Description</h2>
<div>The only difference between this class and <a href="___Tally.html" title="the class of all tally results">Tally</a> is that this class allows negative numbers.<table class="examples"><tr><td><pre>i1 : x = tally {a,b,b,c,c,c}
o1 = Tally{a => 1}
b => 2
c => 3
o1 : Tally</pre>
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<tr><td><pre>i2 : y = tally {a,a,a,b,b,c}
o2 = Tally{a => 3}
b => 2
c => 1
o2 : Tally</pre>
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<tr><td><pre>i3 : x' = new VirtualTally from x
o3 = VirtualTally{a => 1}
b => 2
c => 3
o3 : VirtualTally</pre>
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<tr><td><pre>i4 : y' = new VirtualTally from y
o4 = VirtualTally{a => 3}
b => 2
c => 1
o4 : VirtualTally</pre>
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<tr><td><pre>i5 : x-y
o5 = Tally{c => 2}
o5 : Tally</pre>
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<tr><td><pre>i6 : x'-y'
o6 = VirtualTally{c => 2}
o6 : VirtualTally</pre>
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<div class="single"><h2>See also</h2>
<ul><li><span><a href="___Betti__Tally.html" title="the class of all Betti tallies">BettiTally</a> -- the class of all Betti tallies</span></li>
</ul>
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<div class="waystouse"><h2>Types of virtual tally :</h2>
<ul><li><span><a href="___Betti__Tally.html" title="the class of all Betti tallies">BettiTally</a> -- the class of all Betti tallies</span></li>
</ul>
<h2>Functions and methods returning a virtual tally :</h2>
<ul><li>VirtualTally - VirtualTally</li>
<li><span><tt>VirtualTally + VirtualTally</tt> (missing documentation<!-- tag: (+,VirtualTally,VirtualTally) -->)</span></li>
</ul>
<h2>Methods that use a virtual tally :</h2>
<ul><li><span><tt>- VirtualTally</tt> (missing documentation<!-- tag: (-,VirtualTally) -->)</span></li>
</ul>
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<div class="waystouse"><h2>For the programmer</h2>
<p>The object <a href="___Virtual__Tally.html" title="">VirtualTally</a> is <span>a <a href="___Type.html">type</a></span>, with ancestor classes <a href="___Tally.html" title="the class of all tally results">Tally</a> < <a href="___Hash__Table.html" title="the class of all hash tables">HashTable</a> < <a href="___Thing.html" title="the class of all things">Thing</a>.</p>
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