迭代多维数组以获取特定值 ruby

Question

I'm using the Bandsintown api to grab upcoming concert dates based on which artists a user is following on my site and where the user is located. Right now I'm having trouble iterating over a multidimensional array of data that I get back as a response.

The Goal

To iterate through an array of arrays and then grab an artists' name to display it on my view.

I'm able to grab the data I want with the following code inside my controller:

class CalendarController < ApplicationController
  require 'uri'

  def index
    @user = current_user
    @hash_version_array = []

    @user.follows.each do |follow|
      response = HTTParty.get("http://api.bandsintown.com/artists/#{URI.escape(follow.artist_name)}/events/search.json?api_version=2.0&app_id=el_proyecto_de_la_musica&location=use_geoip")
      @hash_version = JSON.parse(response.body)

      @hash_version_array << @hash_version
    end

    @hash_version_array
  end

  def show
  end
end

the code above produces the following results inside of my @hash_version_array (click here for the results, easier to show through a gist on github)

I get stuck when trying to iterate over @hash_version_array to grab each artist's name.

Attempt 1

[9] pry(#<CalendarController>)> @hash_version_array.each do |sub_array|
[9] pry(#<CalendarController>)*   sub_array.each do |artist|  
[9] pry(#<CalendarController>)*     artist["artists"]["name"]    
[9] pry(#<CalendarController>)*   end  
[9] pry(#<CalendarController>)* end

Results in

TypeError: no implicit conversion of String into Integer
from (pry):96:in `[]'

Attempt 2

[8] pry(#<CalendarController>)> @hash_version_array.each do |sub_array|
[8] pry(#<CalendarController>)*   sub_array.each do |artist|
[8] pry(#<CalendarController>)*     artist["artists"].each do |artist|
[8] pry(#<CalendarController>)*       artist["name"]
[8] pry(#<CalendarController>)*     end  
[8] pry(#<CalendarController>)*   end  
[8] pry(#<CalendarController>)* end

Results in the same value I got for @hash_version_array to begin with

Answer 1

To get the name of an artist, you'll have to fetch it via the following structure:

artist[0]["artists"][0]["name"]

I'll leave it up to you to make the code more robust.

Answer 2

A Hash is a dictionary-like collection of unique keys and their values

hash = {my_key: my_value}

so if you want to get a value just use hash['my_key'] docs

  hash.each do |key,value|
      key['my_key']
    end