按值从高到低对哈希数组进行排序

Question

我有一个这种格式的哈希：

images_found = {
  "results" => [
    {"img_1"=>1.923076923076923},
    {"img_2"=>0.8241758241758242},
    {"img_3"=>0.6868131868131868},
    {"img_4"=>0.5494505494505495},
    {"img_5"=>0.4120879120879121},
    {"img_6"=>0.3434065934065934},
    {"img_7"=>0.2747252747252747},
    {"img_8"=>0.2060439560439561},
    {"img_9"=>0.1373626373626374},
    {"img_10"=>0.06868131868131869},
    {"img_11"=>0.5494505494505495},
    {"img_12"=>0.3434065934065934},
    {"img_13"=>0.2747252747252747},
    {"img_14"=>0.2060439560439561},
    {"img_15"=>0.1373626373626374},
    {"img_16"=>0.06868131868131869}
  ],
  "type" => "SEARCH_RESULTS"
}

我想按值从高到低对images_found["results"] 进行排序，结果将是：

images_found = {
  "results"=> [
    {"img_1"=>1.923076923076923},
    {"img_2"=>0.8241758241758242},
    {"img_3"=>0.6868131868131868},
    {"img_4"=>0.5494505494505495},
    {"img_11"=>0.5494505494505495},
    {"img_5"=>0.4120879120879121},
    {"img_6"=>0.3434065934065934},
    {"img_12"=>0.3434065934065934},
    {"img_7"=>0.2747252747252747},
    {"img_13"=>0.2747252747252747},
    {"img_8"=>0.2060439560439561},
    {"img_14"=>0.2060439560439561},
    {"img_9"=>0.1373626373626374},
    {"img_15"=>0.1373626373626374},
    {"img_10"=>0.06868131868131869},
    {"img_16"=>0.06868131868131869}
  ],
  "type" => "SEARCH_RESULTS"
}

我尝试的解决方案是images_found["results"].sort_by! {|_key, value| value}，但它不起作用。

当我尝试调试 value 时，它正在打印 nil

我四处寻找解决方案，但没有找到与此问题陈述相匹配的任何内容。

请推荐！

Answer 1

应该是

images_found["results"] = images_found["results"].sort_by(&:values).reverse

Answer 2

有多种方法可以获得所需的结果：

images_found["results"].sort_by! { |x| x.values.first }.reverse!

请注意，带有! 的方法会更改原始哈希。如果您不想更改原始哈希，请删除!。

另一种选择是使用- 符号作为排序条件：

images_found["results"].sort_by! { |x| - x.values.first }