On Tue, Mar 10, 2009 at 3:39 PM, Torm3nt <[email protected]> wrote:
>
> Your turn!!
>
>
>
A favourite of mine is that if, case, etc. are expressions, not statements.
value =
if expression
foo
else
bar
end
or
value =
begin
calculation()
rescue
default_value
end
Here's some real-life code of mine that uses this. It also uses another
great idiom: multiple assignment.
@expression, @result, @filename =
case option
when "sqrt2"
two = BigDecimal.new("2")
["sqrt(2)", sqrt(two, ACCURACY), "sqrt2"]
when "1_7"
one = BigDecimal.new("1.0")
seven = BigDecimal.new("7.0")
["1 / 7", one.div(seven, ACCURACY), "one seventh"]
when "PI"
["PI", PI(ACCURACY), "PI"]
else
puts "Usage: ruby cnum.rb { #{OPTIONS.join(' | ')} }"
exit!
end
Cheers,
Gavin
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