Map range: Difference between revisions

=={{header|J}}==

<lang j>maprange=:2 :0

'a1 a2'=.m

'b1 b2'=.n

b1+((y-a1)*b2-b1)%a2-a1

)</lang>

Or

<lang j>maprange=:2 :0

'a1 a2'=.m

'b1 b2'=.n

b1 + ((b2-b1)%a2-a1) * -&a1

)</lang>

Example use:

<lang j> 2 4 maprange 5 11 (2.718282 3 3.141592)

7.15485 8 8.42478</lang>

or

<lang j> adjust=:2 4 maprange 5 11

adjust 2.718282 3 3.141592

7.15485 8 8.42478</lang>