Question

我搜索了很多，但目前我很难过。我希望简化一个数组，以便更容易使用......

现在我的数组看起来像这样：

[[{"title"=>"Test Entry 2", "date"=>"2013-11-01 21:05"}, "\nThis is just another test entry."], [{"title"=>"Test Entry", "date"=>"2013-11-01 18:05"}, "\nThis is just a test entry."]]

要打印我目前拥有的这些值：

entries.each do |x|
  puts x[0]["title"]
  puts x[0]["date"]
  puts x[1]
end

我希望它看起来像这样（我想）：

[{"title"=>"Test Entry 2", "date"=>"2013-11-01 21:05", "content"=>"\nThis is just another test entry".}], [{"title"=>"Test Entry", "date"=>"2013-11-01 18:05", "content"="\nThis is just a test entry.}]

我希望能够通过循环轻松调用这些值，例如：

entries.each do |entry|
  puts entry["title"]
  puts entry["date"]
  puts entry["content"]
end

任何帮助将不胜感激。谢谢你的期待!!

Answer 1

怎么样

a = [[{"title"=>"Test Entry 2", "date"=>"2013-11-01 21:05"}, "\nThis is just another test entry."], [{"title"=>"Test Entry", "date"=>"2013-11-01 18:05"}, "\nThis is just a test entry."]]

a.map! {|hsh, content| hsh['content'] = content; hsh }

#=> [{"title"=>"Test Entry 2", "date"=>"2013-11-01 21:05", "content"=>"\nThis is just another test entry."}, {"title"=>"Test Entry", "date"=>"2013-11-01 18:05", "content"=>"\nThis is just a test entry."}]

这适用于b / c map块可以采用以数组的索引顺序分配的多个参数。因此map遍历a数组，拉出每个哈希和内容字符串。然后，我们将内容字符串分配给散列的新content成员并返回散列。

Answer 2

你已经做到了。在纠正了一个小错误后，你正在追踪

entries=[
  {"title"=>"Test Entry 2", "date"=>"2013-11-01 21:05", "content"=>"\nThis is just another test entry."},
  {"title"=>"Test Entry", "date"=>"2013-11-01 18:05", "content"=>"\nThis is just a test entry."}
]

entries.each do |entry|
  puts entry["title"] # Test Entry 2
  puts entry["date"]  # 2013-11-01 21:05
  puts entry["content"] # 
                        # This is just another test entry.
end

只是一个哈希数组。您还可以使用entry.keys.each {|k| puts entry[k]}表达式显示值。

简化Ruby数组

2 个答案: