Matrix multiplication: Difference between revisions
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Thundergnat (talk | contribs) m (syntax highlighting fixup automation) |
(→{{header|Raku}}: add an other take) |
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Which overloads the built-in <code>×</code> operator for <code>Positional</code> operands. You’ll notice we are using <code>×</code> inside of the definition; since the arguments there are <code>Scalar</code>, it multiplies two numbers. Also, <code>do</code> is an alternative to parenthesising the loop for getting its result. |
Which overloads the built-in <code>×</code> operator for <code>Positional</code> operands. You’ll notice we are using <code>×</code> inside of the definition; since the arguments there are <code>Scalar</code>, it multiplies two numbers. Also, <code>do</code> is an alternative to parenthesising the loop for getting its result. |
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{{works with|Rakudo|2022.07-3}} |
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Here is an even more concise version, expressing the product of two matrices as the cross dot product of the first matrix with the transpose of the second : |
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<syntaxhighlight lang="raku" line>sub infix:<×>(@A, @B) { |
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cross(@A, ([Z] @B), with => { [+] @^a Z* @^b }) |
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.rotor(@B); |
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}</syntaxhighlight> |
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=={{header|Rascal}}== |
=={{header|Rascal}}== |
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