arrays - Ruby按特定顺序合并两个数组

Question

我正在尝试使用来自 json 对象的 s3api cli 为 aws put-object-tagging 创建“TagSet”。我已经将 json 解析为散列，这是我实现最终目标的最大成功。

示例 json：

{ "key1": "value1", "key2": "value2", "key3": "value3", "key4": "value4", "key5": "value5" }

最终目标示例：

'{"TagSet": [{ "Key": "key1", "Value": "value1" }, { "Key": "key2", "Value": "value2"}, { "Key": "key3", "Value": "value3"}, { "Key": "key4", "Value": "value4"}, { "Key": "key5", "Value": "value5"}]}'

到目前为止，我已经将 json 解析为哈希，然后使用以下命令将键和值拆分为 2 个数组：

json = '{ "key1": "value1", "key2": "value2", "key3": "value3", "key4": "value4", "key5": "value5" }'

new_hash = JSON.parse(json)
keys = new_hash.keys
values = new_hash.values
my_keys = []
my_vals = []


keys.each do |k|
  my_keys << "--Key " + k.to_s
end

values.each do |v|
  my_vals << "--Value " + v.to_s
end

我想我可以遍历每个数组并将它们插入到一个数组中。但是我得到的输出是每个值重复的所有键的递归列表。

output = []
 my_keys.each do |x|
  my_vals.each do |y|
    output << x + " " + y
  end
end

输出：

--Key key1 --Value value1
--Key key1 --Value value2
--Key key1 --Value value3
--Key key1 --Value value4
--Key key1 --Value value5
--Key key2 --Value value1
--Key key2 --Value value2
--Key key2 --Value value3
--Key key2 --Value value4
--Key key2 --Value value5
--Key key3 --Value value1
--Key key3 --Value value2
--Key key3 --Value value3
--Key key3 --Value value4
--Key key3 --Value value5
--Key key4 --Value value1
--Key key4 --Value value2
--Key key4 --Value value3
--Key key4 --Value value4
--Key key4 --Value value5
--Key key5 --Value value1
--Key key5 --Value value2
--Key key5 --Value value3
--Key key5 --Value value4
--Key key5 --Value value5

任何有关如何创建此 TagSet 的建议将不胜感激！

标签： arraysrubyhashaws-clis3-object-tagging

Answer 1

require 'json'

json = '{ "key1": "value1", "key2": "value2", "key3": "value3", "key4": "value4", "key5": "value5" }'


tagset = JSON.parse(json)
  .map { |key, value| { Key: key, Value: value } }
  # => [{"Key":"key1","Value":"value1"},{"Key":"key2","Value":"value2"},{"Key":"key3","Value":"value3"},{"Key":"key4","Value":"value4"},{"Key":"key5","Value":"value5"}]

{TagSet: tagset}.to_json
  # => '{"TagSet":[{"Key":"key1","Value":"value1"},{"Key":"key2","Value":"value2"},{"Key":"key3","Value":"value3"},{"Key":"key4","Value":"value4"},{"Key":"key5","Value":"value5"}]}'