22 lines
1.1 KiB
HTML
22 lines
1.1 KiB
HTML
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; lists and vectors (and thus strings and bit-vectors) are subtypes of sequences
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;
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; the following functions available on all kinds of sequences
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; (length S) returns the length of sequence S
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; (elt S i) returns the i'th element of sequence S
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; (setf (elt S i) value) sets a new value for the i'th element of sequence S
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; (count e S) returns a count of how many times e appears in S
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; (remove e S) removes all instances of e from S
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; (position e S) returns the position of the first instance of e in S
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; (substitute eNew eOld S) replaces eOld with eNew throughout S
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; (copy-seq S) returns a new sequence that is a duplicate of S
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; there are a host of other functions available to operate on an entire sequence:
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; concatenate, reverse, copy-seq, sort, stable-sort, remove-duplicates, merge
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; note that these often expect extra arguments, e.g.
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; sort expects a suitable comparison operator:
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; (sort '(4 3 2 1 5 10) '<) ; sorts using <, which of course expects numeric data
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; concatenate needs to know what kind of sequences it is concatenating:
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; (concatenate 'string str1 str2)
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