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Ingy döt Net 2023-07-01 11:58:00 -04:00
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11
Task/Map-range/REXX/map-range-1.rexx Normal file
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/*REXX program maps and displays a range of numbers from one range to another range.*/
rangeA = 0 10 /*or: rangeA = ' 0 10 ' */
rangeB = -1 0 /*or: rangeB = " -1 0 " */
parse var rangeA L H
inc= 1
do j=L to H by inc * (1 - 2 * sign(H<L) ) /*BY: either +inc or -inc */
say right(j, 9) ' maps to ' mapR(rangeA, rangeB, j)
end /*j*/
exit /*stick a fork in it, we're done.*/
/*──────────────────────────────────────────────────────────────────────────────────────*/
mapR: procedure; parse arg a1 a2,b1 b2,s;$=b1+(s-a1)*(b2-b1)/(a2-a1);return left('',$>=0)$

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Task/Map-range/REXX/map-range-2.rexx Normal file
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/*REXX program maps and displays a range of numbers from one range to another range.*/
rangeA = 10 0 /*or: rangeA = ' 0 10 ' */
rangeB = -1 0 /*or: rangeB = " -1 0 " */
parse var rangeA L H
inc= 1/2
do j=L to H by inc * (1 - 2 * sign(H<L) ) /*BY: either +inc or -inc */
say right(j, 9) ' maps to ' mapR(rangeA, rangeB, j)
end /*j*/
exit /*stick a fork in it, we're done.*/
/*──────────────────────────────────────────────────────────────────────────────────────*/
mapR: procedure; parse arg a1 a2,b1 b2,s;$=b1+(s-a1)*(b2-b1)/(a2-a1);return left('',$>=0)$

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Task/Map-range/REXX/map-range-3.rexx Normal file
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/*REXX program maps and displays a range of numbers from one range to another range.*/
rangeA = 0 10
rangeB = -1 0
inc = 1
call mapR rangeA, rangeB, inc
exit /*stick a fork in it, we're all done. */
/*──────────────────────────────────────────────────────────────────────────────────────*/
mapR: procedure; parse arg a1 a2, b1 b2, inc /* [↓] BY is either +inc or -inc.*/
do s=a1 to a2 by inc * (1 - 2 * sign(a2 < a1) )
t= b1 + (s-a1) * (b2-b1) / (a2-a1)
say right(s, 9) ' maps to' left('', t>=0) t
end /*s*/
return /* [↑] LEFT··· aligns non─negative #'s*/

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Task/Map-range/REXX/map-range-4.rexx Normal file
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/*REXX program maps a number from one range to another range. */
/* 31.10.2013 Walter Pachl */
/* 'translated' from an older version 1 without using Procedure */
do j=0 to 10
say right(j,3) ' maps to ' mapRange(0,10,-1,0,j)
end
exit
/*──────────────────────────────────MAPRANGE subroutine─────────────────*/
mapRange: return arg(3)+(arg(5)-arg(1))*(arg(4)-arg(3))/(arg(2)-arg(1))
/* Arguments are arg a1,a2,b1,b2,x */