2 - To be or not to be

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#1

So, I don’t really know what the error is, because it says that the program took too long to finish, and that I should check for infinite loops.
$VERBOSE = nil # We’ll explain this at the end of the lesson.
require ‘prime’ # This is a module. We’ll cover these soon!

def first_n_primes(n)

unless n.is_a? Integer
return “n must be an integer.”
end

if n <= 0
return “n must be greater than 0.”
end

prime_array ||=

prime = Prime.new
for num in (1…n)
prime_array.push(prime.next)
end
return prime_array
end

first_n_primes(10)

So, the only thing I changed was the prime_array ||= and I don’t see where the problem could be.

I tried again, and it worked.

#2

Hey dude,

I don’t know exacly, but i think the,

prime_array =|| ,

means: prime_array could exist or not.
So if it exists. “don’t” create another, but if doesn’t, “New” prime_array.

Peace.

1 Like
#3

Hey!
The answer is
$VERBOSE = nil # We’ll explain this at the end of the lesson.
require ‘prime’ # This is a module. We’ll cover these soon!

def first_n_primes(n)

  unless n.is_a? Integer
    return "n must be an integer."
  end

  if n <= 0
    return "n must be greater than 0."
  end
  
  prime_array ||= []
  
  prime = Prime.new
  for num in (1..n)
    prime_array.push(prime.next)
  end
  return prime_array
end

first_n_primes(10)

Tnahks

#4

i did the same.
still getting error

#5

i’m very thanx for your code
the code is right

#6

Ruby is very nit picky about spacing so you have to make its spaced out right. There should be a space right after prime_array and then another one after the equal sign.

prime_array ||=

#7

[ask]
why you don’t define array ?
ex :
def prime_array (optional_array)
optional_array ||=
end