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langs a-z

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Ingy döt Net 2013-04-10 22:43:41 -07:00
parent db842d013d
commit d066446780
11389 changed files with 98361 additions and 1020 deletions
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16
Task/Dot-product/Rascal/dot-product-1.rascal Normal file
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import List;
public int dotProduct(list[int] L, list[int] M){
result = 0;
if(size(L) == size(M)) {
while(size(L) >= 1) {
result += (head(L) * head(M));
L = tail(L);
M = tail(M);
}
return result;
}
else {
throw "vector sizes must match";
}
}

12
Task/Dot-product/Rascal/dot-product-2.rascal Normal file
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import Prelude;
public real matrixDotproduct(rel[real x, real y, real v] column1, rel[real x, real y, real v] column2){
return (0.0 | it + v1*v2 | <x1,y1,v1> <- column1, <x2,y2,v2> <- column2, y1==y2);
}
//a matrix, given by a relation of x-coordinate, y-coordinate, value.
public rel[real x, real y, real v] matrixA = {
<0.0,0.0,12.0>, <0.0,1.0, 6.0>, <0.0,2.0,-4.0>,
<1.0,0.0,-51.0>, <1.0,1.0,167.0>, <1.0,2.0,24.0>,
<2.0,0.0,4.0>, <2.0,1.0,-68.0>, <2.0,2.0,-41.0>
};