Help/Core/Boolean.html

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  17 <p class="p1"><b>Boolean</b></p>
  18 <p class="p2"><br></p>
  19 <p class="p3"><b>superclass: Object</b></p>
  20 <p class="p2"><br></p>
  21 <p class="p3">Boolean is an abstract class whose instances represent a logical value.<span class="Apple-converted-space"> </span></p>
  22 <p class="p3">Boolean is the superclass of True and False which are the concrete realizations.</p>
  23 <p class="p3">In code True and False are represented by the literal values true and false.</p>
  24 <p class="p2"><br></p>
  25 <p class="p3"><b>xor(aBoolean)</b></p>
  26 <p class="p2"><br></p>
  27 <p class="p3">Answers the exclusive or of the receiver and another Boolean.</p>
  28 <p class="p2"><br></p>
  29 <p class="p3"><b>and(function)</b></p>
  30 <p class="p3"><b>and: function</b></p>
  31 <p class="p2"><br></p>
  32 <p class="p3">If the receiver is true then answer the evaluation of function.</p>
  33 <p class="p3">If the receiver is false then function is not evaluated and the message answers false.</p>
  34 <p class="p2"><br></p>
  35 <p class="p3"><b>or(function)</b></p>
  36 <p class="p3"><b>or: function</b></p>
  37 <p class="p2"><br></p>
  38 <p class="p3">If the receiver is false then answer the evaluation of function.</p>
  39 <p class="p3">If the receiver is true then function is not evaluated and the message answers true.</p>
  40 <p class="p2"><br></p>
  41 <p class="p3"><b>&amp;&amp; aBoolean</b></p>
  42 <p class="p2"><br></p>
  43 <p class="p3">Answers true if the receiver is true and aBoolean is true.</p>
  44 <p class="p2"><br></p>
  45 <p class="p3"><b>|| aBoolean</b></p>
  46 <p class="p2"><br></p>
  47 <p class="p3">Answers true if either the receiver is true or aBoolean is true.</p>
  48 <p class="p2"><br></p>
  49 <p class="p3"><b>nand(aBoolean)</b></p>
  50 <p class="p3"><b>nand: aBoolean</b></p>
  51 <p class="p2"><br></p>
  52 <p class="p3">Answers true unless both the operands are true (Sheffer stroke)</p>
  53 <p class="p2"><br></p>
  54 <p class="p3"><b>not</b></p>
  55 <p class="p2"><br></p>
  56 <p class="p3">Answers true if the receiver is false, and false if the receiver is true.</p>
  57 <p class="p2"><br></p>
  58 <p class="p2"><br></p>
  59 <p class="p3"><b>if( trueFunc, falseFunc )</b></p>
  60 <p class="p2"><br></p>
  61 <p class="p3">If the receiver is true, answer the evaluation of the trueFunc. If the receiver is false, answer the evaluation of the falseFunc.</p>
  62 <p class="p2"><br></p>
  63 <p class="p3"><b>binaryValue</b></p>
  64 <p class="p2"><br></p>
  65 <p class="p3">Answer 1 if the receiver is true, and 0 if the receiver is false.</p>
  66 <p class="p2"><br></p>
  67 <p class="p3"><b>booleanValue</b></p>
  68 <p class="p2"><br></p>
  69 <p class="p3">Return receiver. The same message is understood by <a href="../Math/SimpleNumber.html"><span class="s1">SimpleNumber</span></a><span class="s1"> </span>and can be used to convert it to boolean.</p>
  70 <p class="p2"><br></p>
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