Shoelace formula for polygonal area: Difference between revisions
Shoelace formula for polygonal area (view source)
Revision as of 15:03, 19 December 2023
, 5 months agoadd elixir example
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Line 624:
shoelace data[][] res
print res
</syntaxhighlight>
=={{header|Elixir}}==
<syntaxhighlight lang="elixir">
def shoelace(points) do
points
|> Enum.reduce({0, List.last(points)}, fn {x1, y1}, {sum, {x0, y0}} ->
{sum + (y0 * x1 - x0 * y1), {x1, y1}}
end)
|> elem(0)
|> div(2)
end
</syntaxhighlight>
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