ruby - help with a simple method -

i must write method should "multiplies 2 numbers" , "multiplies array of numbers". i'm fresh ruby , solved it, 1 method this:

  def multi(*l)     sum = 1     l.flatten! if l.is_a? array     l.each{|i| sum = sum*i}     return sum   end

i'm sure there better ways, how can improve method? more ruby syntax :)

the if l.is_a? array not necessary because way multi define, l array.

the pattern

result = starting_value xs.each {|x| result = result op x} result

can written more succinctly using xs.inject(starting_value, :op).

so can write code as:

def multi(*l)     l.flatten.inject(1, :*) end

if you're ok, calling method multi(*array) instead of multi(array) multiply array, can leave out flatten, well.

Nine