103 lines
2 KiB
Text
103 lines
2 KiB
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{Boolean}
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abstract class whose instances represent a logical value@section{categories}
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Core
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@section{related}
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Reference/Control-Structures
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@section{description}
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Boolean is the superclass of link::Classes/True:: and link::Classes/False:: which are the concrete realizations.
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In code True and False are represented by the literal values
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@racketblock[true:: and ]
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@racketblock[false::.
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]
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@section{instanceMethods}
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@section{private}
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while
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@section{private}
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storeOn
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@section{private}
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trace
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@section{private}
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printOn
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@section{private}
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archiveAsCompileString
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@section{method}
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xor
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@section{returns}
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the exclusive or of the receiver and another Boolean.
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@section{method}
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and
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If the receiver is true then answer the evaluation of function.
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If the receiver is false then function is not evaluated and the message answers false.
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@section{method}
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or
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If the receiver is false then answer the evaluation of function.
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If the receiver is true then function is not evaluated and the message answers true.
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@section{method}
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&&
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@section{returns}
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true if the receiver is true and aBoolean is true.
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@section{method}
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@section{returns}
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true if either the receiver is true or aBoolean is true.
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@section{method}
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nand
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@section{returns}
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true unless both the operands are true (Sheffer stroke)
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@section{method}
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not
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@section{returns}
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true if the receiver is false, and false if the receiver is true.
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@section{method}
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if
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If the receiver is true, answer the evaluation of the trueFunc. If the receiver is false, answer the evaluation of the falseFunc.
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@section{method}
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asInteger
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@section{method}
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binaryValue
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@section{returns}
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1 if the receiver is true, and 0 if the receiver is false.
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@section{method}
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asBoolean
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@section{method}
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booleanValue
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@section{Returns}
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The receiver. The same message is understood by link::Classes/SimpleNumber:: and can be used to convert it to boolean.
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@section{method}
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keywordWarnings
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turn on/off warnings if a keyword argument is not found
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