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A-M baby

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Ingy döt Net 2013-04-10 21:29:02 -07:00
parent 764da6cbbb
commit db842d013d
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Task/Create-a-two-dimensional-array-at-runtime/Factor/create-a-two-dimensional-array-at-runtime.factor Normal file
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USING: io kernel math.matrices math.parser prettyprint
sequences ;
IN: rosettacode.runtime2darray
: set-Mi,j ( elt {i,j} matrix -- )
[ first2 swap ] dip nth set-nth ;
: Mi,j ( {i,j} matrix -- elt )
[ first2 swap ] dip nth nth ;
: example ( -- )
readln readln [ string>number ] bi@ zero-matrix ! create the array
[ [ 42 { 0 0 } ] dip set-Mi,j ] ! set the { 0 0 } element to 42
[ [ { 0 0 } ] dip Mi,j . ] ! read the { 0 0 } element
bi ;