Display a linear combination: Difference between revisions
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(we don't really need decimal numbers) |
(Perl 6 solution) |
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9) -1, -2, 0, -3 |
9) -1, -2, 0, -3 |
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10) -1</pre> |
10) -1</pre> |
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=={{header|Perl 6}}== |
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<lang perl6>my @examples = |
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sub linear-combination(@coeff) { |
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my @terms = @coeff Z=> map { "e($_)" }, 1 .. *; |
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@terms.=grep(+*.key); |
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return '0' unless @terms; |
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my $result = join '+', |
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map { .key ~ '*' ~ .value }, |
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@terms; |
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$result ~~ s:g/'+-'/-/; |
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$result ~~ s:g/<|w>1\*//; |
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return $result; |
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} |
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say linear-combination(@$_) for |
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[1, 2, 3], |
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[0, 1, 2, 3], |
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[1, 0, 3, 4], |
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[1, 2, 0], |
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[0, 0, 0], |
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[0], |
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[1, 1, 1], |
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[-1, -1, -1], |
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[-1, -2, 0, -3], |
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[ -1] |
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;</lang> |
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{{out}} |
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<pre>e(1)+2*e(2)+3*e(3) |
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e(2)+2*e(3)+3*e(4) |
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e(1)+3*e(3)+4*e(4) |
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e(1)+2*e(2) |
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0 |
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0 |
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e(1)+e(2)+e(3) |
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-e(1)-e(2)-e(3) |
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-e(1)-2*e(2)-3*e(4) |
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-e(1)</pre> |
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