Ruby loop create empty lines

Question

I'm newbie in Ruby (frankly, I've just started learning it for fun, without any future plans), and I've noticed strange behaviour of loops. I assume my problem comes from lacks in knowledge in the mechanics of Ruby.

boysNames = ["Martin", "Lucas", "John"]

#class only for one method. I know it's not absolutely correct, but huh I'm just learning Ruby
class Human
    def initialize(name)
        @name = name;
    end
   String name = ""

   def getName()
       puts @name;
    end
end

Array boys = []




#create objects
for x in boysNames
    tempBoy = Human.new(x)
    boys.push(tempBoy)
end

#output for class

puts "Method 1: for in loop \n"
for x in boys
    puts x.getName()
end


puts "\nMethod 2: manual array[var] \n"
boys[0].getName()
boys[1].getName()
boys[2].getName()

puts "\nMethod 3: .each do \n"
boys.each do |i|
    puts i.getName()
end

#output for Array

puts "Method 1: for in loop \n"

for x in boysNames
    puts x
end


puts "\nMethod 2: manual array[var] \n"
puts boysNames[0]
puts boysNames[1]
puts boysNames[2]

puts "\nMethod 3: .each do \n"
boysNames.each do |i|
    puts i
end


#loop through the boys array
puts "\nboys array:  \n"
for x in boys
    puts x
end

So my question is: Why when I loop through the array everything is fine, and when I loop through the class, my results are divided by newlines? Are there any "invisible" objects that I couldn't find? As you can see my last loop found only three objects with different places in the memory.

I will be pleased, if the answer contains explanation of "how it works".

Thank you in advance ;)

P.S. Output:

Method 1: for in loop 
Martin

Lucas

John


Method 2: manual array[var] 
Martin
Lucas
John

Method 3: .each do 
Martin

Lucas

John

Method 1: for in loop 
Martin
Lucas
John

Method 2: manual array[var] 
Martin
Lucas
John

Method 3: .each do 
Martin
Lucas
John

boys array:  
#<Human:0x007f2a586db788>
#<Human:0x007f2a586db648>
#<Human:0x007f2a586db5d0>

P.S.S. I'm using this as the Ruby interpreter/compiler (I heard that Ruby can also be compiled, so...)

Answer 1

You're calling puts x.getName(), but getName() already has puts inside of it.

puts adds a newline to the end of each argument if there is not one already.

print does not add a new line.

(What is the difference between print and puts?)