Ruby 在数组中查找下一个

Question

有没有办法在 Ruby 数组中找到下一个项目？

代码:

# Find ALL languages
if !debug
  lang = Language.all
else
  lang = Language.where("id = ? OR id = ?", 22, 32)
end

# Get all elements
elements = Element.where("human_readable IS NOT NULL")

lang.each do |l|
  code = l.code.downcase
  if File.exists?(file_path + code + ".yml")
    File.delete(file_path + code + ".yml")
  end

  t1 = Time.now

  info = {}
  elements.each do |el|
    unless l.id == 1
      et = el.element_translations.where("language_id = ? AND complete = ?", l.id, true)
    else
      et = el.element_translations.where("language_id = ?", 1)
    end
    et.each do |tran|
      info[code] ||= {}
      info[code][el.human_readable] = tran.content.gsub("\n", "").force_encoding("UTF-8").encode!
    end
  end
  File.open(file_path + code + ".yml", "w", :encoding => "UTF-8") do |f|
    if f.write(info.to_yaml)
      t2 = Time.now

      puts code + ".yml File written"
      puts "It took " + time_diff_milli(t1, t2).to_s + " seconds to complete"
      # This is where I want to display the next item in the lang array
      puts lang.shift(1).inspect
      puts "*"*50
    end
  end
end

Answer 1

Array 包括 Enumerable，因此您可以使用 each_with_index :

elements.each_with_index {|element, index|
   next_element = elements[index+1]
   do_something unless next_element.nil?
   ...

}