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⇤ ← Revision 1 as of 2006-01-18 17:02:05
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| || Symbolic expressions / or just expressions |||| Atoms and lists collectively are called expressions. |||| || | || Symbolic expressions / or [s-]expressions |||| Atoms and lists collectively are called expressions. |||| || |
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| || Data Types |||| See Figure 1 |||| || || FIRST |||| (FIRST LIST) returns the first expression in the list |||| (FIRST (A B C)) --> A || || REST |||| (REST LIST) returns the expression after the first element of the list as a list |||| (REST (A B C)) --> (B C) || || QUOTE |||| '(I J) will return a list with the elements I and J without trying to interpret I as a function |||| '(A B C) --> (A B C)|| {{{ |Number | |Atom---| | | Expressions -| |Symbol | |LIST }}} Figure 1 |
Term |
Definition |
Example |
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Atoms |
Like types: the fundamental items formed from bits |
27, 3.14, This-Phrase |
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Lists |
Sentence like objects containing atoms or other lists. |
'(this that the other thing) |
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Symbolic expressions / or [s-]expressions |
Atoms and lists collectively are called expressions. |
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setf |
(setf <name> <list>) creates a set called <name> that has the value <list> |
(setf friends '(Dan Randy)) |
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Data Types |
See Figure 1 |
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FIRST |
(FIRST LIST) returns the first expression in the list |
(FIRST (A B C)) --> A |
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REST |
(REST LIST) returns the expression after the first element of the list as a list |
(REST (A B C)) --> (B C) |
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QUOTE |
'(I J) will return a list with the elements I and J without trying to interpret I as a function |
'(A B C) --> (A B C) |
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|Number
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|Atom---|
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Expressions -| |Symbol
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|LISTFigure 1