Getting a weird error in ruby while trying to pass an array to a method

Question

The following code:

def array_sum(*n)
  sum = 0
  0.upto(a.length-1) do |i|
    sum += n[i]
  end
  return sum
end

a = (1..5).to_a
puts array_sum(a)

gives me an ambiguous error:

"/Users/Josh/Documents/Aptana Studio 3 Workspace/Test/Euler7.cgi:10:in array_sum': undefined local variable or methoda' for main:Object (NameError) from /Users/Josh/Documents/Aptana Studio 3 Workspace/Test/Euler7.cgi:17"

Can anyone help me out?

Sergio Tulentsev · Accepted Answer · 2013-04-10 17:59:47Z

7

There's nothing ambiguous about the error. You probably meant to write n.length - 1 instead of a.length - 1.

edited Apr 10, 2013 at 17:59

answered Apr 10, 2013 at 17:48

Sergio Tulentsev

231k43 gold badges381 silver badges373 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Josh Horowitz Over a year ago

Perfect, thank you. No copy pasting, I'm just an idiot. I'll accept your answer as soon as stackOverFlow allows me

Koraktor · Accepted Answer · 2013-04-10 17:55:26Z

2

While Sergio Tulentsev's answer is the appropriate solution here, you might be also interested in a one-line implementation of this algorithm:

puts (1..5).reduce(:+)

answered Apr 10, 2013 at 17:55

Koraktor

43.2k10 gold badges72 silver badges100 bronze badges

1 Comment

Koraktor Over a year ago

reduce(:+) means, call the method + while iterating over the elements of the array. You can also use :- or any other method (of the elements) that accepts an argument.

Collectives™ on Stack Overflow

Getting a weird error in ruby while trying to pass an array to a method

2 Answers 2

1 Comment

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related