[RUBY] Understand the difference between each_with_index and each.with_index

◆ In the case of each_with_index

array = ["Ruby", "PHP", "Python"]
array.each_with_index do |element, index|
  p "#{index}:#{element}"
end

#The output is as follows
# 0:Ruby
# 1:PHP
# 2:Python

◆ In the case of each.with_index

array = ["Ruby", "PHP", "Python"]
array.each.with_index(1) do |element, index|
  p "#{index}:#{element}"
end

# 1:Ruby
# 2:PHP
# 3:Python

Until now, using each_with_index, I purposely displayed it as "index + 1" from 1 Each.with_index is convenient because you can start with a specified number other than 1!

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