factor/core/arrays/arrays.factor

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Factor

! Copyright (C) 2005, 2008 Slava Pestov.
! See http://factorcode.org/license.txt for BSD license.
USING: accessors kernel kernel.private math math.private
sequences sequences.private ;
IN: arrays
M: array clone (clone) ;
M: array length length>> ;
M: array nth-unsafe >r >fixnum r> array-nth ;
M: array set-nth-unsafe >r >fixnum r> set-array-nth ;
M: array resize resize-array ;
: >array ( seq -- array ) { } clone-like ;
M: object new-sequence drop f <array> ;
M: f new-sequence drop dup zero? [ drop f ] [ f <array> ] if ;
M: array like drop dup array? [ >array ] unless ;
M: array equal?
over array? [ sequence= ] [ 2drop f ] if ;
INSTANCE: array sequence
: 1array ( x -- array ) 1 swap <array> ; inline
: 2array ( x y -- array ) { } 2sequence ; inline
: 3array ( x y z -- array ) { } 3sequence ; inline
: 4array ( w x y z -- array ) { } 4sequence ; inline
PREDICATE: pair < array length 2 number= ;