gistfile1.txt

array = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]
array.each_with_index do |v,i|
    puts i.inspect
    if i == 4
        i = 100
    end
end

# 0
# 1
# 2
# 3
# 4
# 105
# 106
# 107
# 108
# 109
# 110