Map range: Difference between revisions
Content deleted Content added
→{{header|PicoLisp}}: Marked incorrect as task asks for a generic function of two input ranges and a value. |
m J: add comments |
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'b1 b2'=.n |
'b1 b2'=.n |
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b1+((y-a1)*b2-b1)%a2-a1 |
b1+((y-a1)*b2-b1)%a2-a1 |
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) |
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)</lang> |
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NB. this version defers all calculations to runtime, but mirrors exactly the task formulation</lang> |
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Or |
Or |
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'b1 b2'=.n |
'b1 b2'=.n |
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b1 + ((b2-b1)%a2-a1) * -&a1 |
b1 + ((b2-b1)%a2-a1) * -&a1 |
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) |
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)</lang> |
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NB. this version precomputes the scaling ratio</lang> |
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Example use: |
Example use: |
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or |
or |
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<lang j> adjust=:2 4 maprange 5 11 |
<lang j> adjust=:2 4 maprange 5 11 NB. save the derived function as a named entity |
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adjust 2.718282 3 3.141592 |
adjust 2.718282 3 3.141592 |
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7.15485 8 8.42478</lang> |
7.15485 8 8.42478</lang> |
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