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add missing usings

Doug Coleman 2009-10-10 14:04:22 -05:00
parent 8ae57d9817
commit b262a6800f
1 changed files with 1 additions and 1 deletions
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core/classes/tuple/tuple-docs.factor
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@ -129,7 +129,7 @@ ARTICLE: "tuple-inheritance-example" "Tuple subclassing example"
}
"Rectangles and parallelograms use the same algorithm for computing the area, whereas they use different algorithms for computing perimiter. Also, rectangles and parallelograms both have " { $snippet "width" } " and " { $snippet "height" } " slots. We can exploit this with subclassing:"
{ $code
"USING: math.constants math.functions ;"
"USING: accessors kernel math math.constants math.functions ;"
"GENERIC: area ( shape -- n )"
"GENERIC: perimiter ( shape -- n )"
""