/usr/share/ruby-rouge/demos/nim is in ruby-rouge 2.2.1-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | import math,strutils
proc fixedWidth(input: string, minFieldSize: int):string {.inline.} =
# Note that field size is a minimum- will expand field if input
# string is larger
if input.startsWith("-"):
return(input & repeatchar(count=(abs(minFieldSize-len(input))),c=' '))
else:
return(" " & input & repeatchar(count=(abs(minFieldSize-len(input))-1),c=' '))
template mathOnInterval(lowbound,highbound:float,counts: int,p:proc) =
block:
var step: float = (highbound - lowbound)/(max(counts,1))
var current: float = lowbound
while current < highbound:
echo($fixedWidth($current,25) & ": " & $fixedWidth($p(current),25))
current += step
echo "Sine of theta from 0 to 2*PI by PI/12"
mathOnInterval(0.0,2.0*PI,12,sin)
echo("\n")
echo "Cosine of theta from 0 to 2*PI by PI/12"
mathOnInterval(0.0,2.0*PI,12,cos)
# The first example above is much the same as:
# for i in 1..100:
# echo($sin( (float(i)/100.0) * 2.0*PI ))
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