Ruby Loops се нуждаят от някакво обяснение - рубин, бримки

Имам този проблем и имам проблеми с цикли и как се отнасят до това изявление. Ако някой може да ме преведе през него.

ruby
beatles = [
{
name: nil,
nickname: "The Smart One"
},
{
name: nil,
nickname: "The Funny One"
},
{
name: nil,
nickname: "The Cute One"
},
{
name: nil,
nickname: "The Quiet One"
}
]

i = 0
while i < beatles.length
# Your code here!
i += 1
end

i = 0
while i < beatles.length
puts "Hi, I"m #{beatles[i][:name]}.  I"m #{beatles[i][:nickname]}!"
i += 1
end

Отговори:

beatles.class         #=> Array
beatles.length        #=> 4
beatles[0]            #=> {:name=>nil, :nickname=>"The Smart One"}
beatles[1]            #=> {:name=>nil, :nickname=>"The Funny One"}
beatles[2]            #=> {:name=>nil, :nickname=>"The Cute One"}
beatles[3]            #=> {:name=>nil, :nickname=>"The Quiet One"}
beatles[4]            #=> nil

h = beatles[2]        #=> {:name=>nil, :nickname=>"The Cute One"}
h.class               #=> Hash
h[:name]              #=> nil
h[:nickname]          #=> "The Cute One"
beatles[2][:name]     #=> nil
beatles[2][:nickname] #=> "The Cute One"

i = 0
while i < beatles.length
puts "i=#{i}"
puts "Hi, I"m #{beatles[i][:name]}.  I"m #{beatles[i][:nickname]}!"
i += 1
end

i=0
Hi, I"m .  I"m The Smart One!
i=1
Hi, I"m .  I"m The Funny One!
i=2
Hi, I"m .  I"m The Cute One!
i=3
Hi, I"m .  I"m The Quiet One!