From: Brian Candler <lists@...>
Date: 2012-09-05T15:24:55+09:00
Subject: Re: Best coding for limiting a value ?

Regis d'Aubarede wrote in post #1074698:
> B)
> result=value
> if value < min then result= min  end
> if value > max then result= max  end

You can avoid the temporary variable by using the return value from 'if' 
and 'case' expressions.

case
when value < min
  min
when value > max
  max
else
  value
end

This scrunches to:

case when value < min: min; when value > max: max; else value; end

(I have a vague idea that something changed about using colon in if/case 
- but I've tested this with 1.8.7 and it works)

There's also the modifier form of if:

result = value
result = min if value < min
result = max if value > max

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