Question

我目前的结构：

input:
[
   {A:A1, B:B1, C:C1, D:D1, E:E1, F:F1, G:G1, H:H1},
   {A:A2, B:B2, C:C2, D:D2, E:E2, F:F2, G:G2, H:H2},
   {A:A3, B:B3, C:C3, D:D3, E:E3, F:F3, G:G3, H:H3}
   ...
]

我的目标：

output
[
   {"A":[A1, A2, A3 ...]},
   {"B":[B1, B2, B3 ...]},
   {"C":[C1, C2, C3 ...]},
   {"D":[D1, D2, D3 ...]},
   {"E":[E1, E2, E3 ...]},
   {"F":[F1, F2, F3 ...]},
   {"G":[G1, G2, G3 ...]},
   {"H":[H1, H2, H3 ...]}
]

其中＆＃34; A＆＃34;，＆＃34; B＆＃34;，＆＃34; C＆＃34; ...是来自原始对象的文字键，它们现在是对象中的键到其类型的所有值的数组。这通常很简单，除了我需要在整个

中维护密钥

这是我到目前为止所尝试过的，但我不确定我的循环结构是否正确。

def ArrayList invertReponse(ArrayList input){

    def output = new ArrayList()

    for(i=0;i<input[0].size();i++){ 

        def tempObj = {}
        def j=0
        input[0].each{ key, value ->            
            tempObj[[input][0][i]][j] = value
            j++
        }
        output.push(tempObj)
    }   
    return output
}

Answer 1

根据您对输入的假设，您可能希望从以下内容开始：

def input = [[A:'A1', B:'B1', C:'C1'],
             [A:'A2', B:'B2', C:'C2'],
             [A:'A3', B:'B3', C:'C3']]

def result = input.inject([:]) { map1, map2 ->
    (map1.keySet() + map2.keySet())
        .inject([:]) {m, k -> m[k] = (map1[k] ?: []) + (map2[k] ?: []); m}
}

result最终会成为[A:[A1, A2, A3], B:[B1, B2, B3], C:[C1, C2, C3]]。

我希望有所帮助。

修改

重新阅读问题后，我现在看到你真正想要的是一个包含一堆Map的List，每个Map中只有一个键。这可能更接近你想要的......

def input = [[A:'A1', B:'B1', C:'C1'], [A:'A2', B:'B2', C:'C2'], [A:'A3', B:'B3', C:'C3']] def result = [] input.inject([:]) { map1, map2 -> (map1.keySet() + map2.keySet()) .inject([:]) {m, k -> m[k] = (map1[k] ?: []) + (map2[k] ?: []); m} }.each { k, v -> result << [(k):v] }

有了这个，result将是[[A:[A1, A2, A3]], [B:[B1, B2, B3]], [C:[C1, C2, C3]]]。

Answer 2

另一种方法是利用高阶函数的强大功能：

<html>

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
  <link rel="stylesheet" type="text/css" href="css/custom.css">
  <link rel="stylesheet" href="css/bootstrap.min.css">
  <link rel="stylesheet" type="text/css" href="css/font-awesome.min.css">
  <meta name="viewport" content="width=device-width initial-scale=1">
  <link href="https://fonts.googleapis.com/css?family=Cormorant+Garamond|EB+Garamond|Great+Vibes" rel="stylesheet">
  <link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>

<body>

  <div class="row">
    <div class="col-xs-6 col-sm-4"><img src="https://www.google.com.ph/url?sa=i&rct=j&q=&esrc=s&source=imgres&cd=&cad=rja&uact=8&ved=&url=https%3A%2F%2Fwww.w3schools.com%2Fcss%2Focean.jpg&psig=AOvVaw3Li5y49HHEkCc_jj8yhZQn&ust=1509070722216853"></div>
    <div class="col-xs-6 col-sm-4"><img src="https://www.google.com.ph/url?sa=i&rct=j&q=&esrc=s&source=imgres&cd=&cad=rja&uact=8&ved=&url=https%3A%2F%2Fwww.w3schools.com%2Fcss%2Focean.jpg&psig=AOvVaw3Li5y49HHEkCc_jj8yhZQn&ust=1509070722216853"></div>
    <div class="col-xs-6 col-sm-4"><img src="https://www.google.com.ph/url?sa=i&rct=j&q=&esrc=s&source=imgres&cd=&cad=rja&uact=8&ved=&url=https%3A%2F%2Fwww.w3schools.com%2Fcss%2Focean.jpg&psig=AOvVaw3Li5y49HHEkCc_jj8yhZQn&ust=1509070722216853"></div>
  </div>
  <div class="row">
    <div class="col-xs-6 col-sm-4"><img src="https://www.google.com.ph/url?sa=i&rct=j&q=&esrc=s&source=imgres&cd=&cad=rja&uact=8&ved=&url=https%3A%2F%2Fwww.w3schools.com%2Fcss%2Focean.jpg&psig=AOvVaw3Li5y49HHEkCc_jj8yhZQn&ust=1509070722216853"></div>
    <div class="col-xs-6 col-sm-4"><img src="https://www.google.com.ph/url?sa=i&rct=j&q=&esrc=s&source=imgres&cd=&cad=rja&uact=8&ved=&url=https%3A%2F%2Fwww.w3schools.com%2Fcss%2Focean.jpg&psig=AOvVaw3Li5y49HHEkCc_jj8yhZQn&ust=1509070722216853"></div>
    <div class="col-xs-6 col-sm-4"><img src="https://www.google.com.ph/url?sa=i&rct=j&q=&esrc=s&source=imgres&cd=&cad=rja&uact=8&ved=&url=https%3A%2F%2Fwww.w3schools.com%2Fcss%2Focean.jpg&psig=AOvVaw3Li5y49HHEkCc_jj8yhZQn&ust=1509070722216853"></div>
  </div>
</body>

</html>

使用键

2 个答案: