Overview

Here is a summary of how to use the each method in a nested manner for learning.

What the each method is is not mentioned in this content.

environment

Ruby 2.6.5

As an example, for the following sequence

vegetables_price = [["tomato", [120, 150, 80]], ["potato", [50, 60, 40]], ["carrot", [120, 150]]]

Suppose you want the following output result.

The total amount of tomato is 350 yen
The total amount of potato is 150 yen
The total amount of carrot is 270 yen

Description

vegetables_price = [["tomato", [120, 150, 80]], ["potato", [50, 60, 40]], ["carrot", [120, 150]]]

vegetables_price.each do |vegetable|　#Array vegetables_Use each method for price.
  sum = 0　#Define a variable sum to store the total value
  vegetable[1].each do |price|　#Variable vegetable[1]Use each method for.[1]Has a price.
    sum += price　#Turn each to add the price.
  end
  puts "#{vegetable[0]}The total amount of#{sum}It's a yen"　#vegetable[0]Contains the name of vegetable.
end

Remarks The subscript 0 is the name of the vegetable, and 1 is the price.

vegetables_price = [["tomato", [120, 150, 80]], ["potato", [50, 60, 40]], ["carrot", [120, 150]]]
   (Subscript)                0              1

that's all

[Ruby] each nested

Overview

environment

Contents