Question

我有两个像这样的数组

$scope.eClauses = [
  {
    swift_code: "31D",
    eline_description: "e-Example 1"
  },
  {
    swift_code: "41D",
    eline_description: "e-Example 2"
  },
  {
    swift_code: "00D",
    eline_description: "e-Example 3"
  }
];


$scope.masterClauses = [
  {
    swift_code: "31D",
    eline_description: "e-Example 1"
  },
  {
    swift_code: "41D",
    eline_description: "e-Example 2"
  }
];

我想比较这些数组，并将不匹配的值与另一个数组（如

）相匹配

$scope.notmatching = [
  {
    swift_code: "00D",
    eline_description: "e-Example 3"
  }
];

到目前为止，我已尝试使用进行每次，但无法正常工作

Answer 1

使用here

let eClauses =[{swift_code:"31D",eline_description:"e-Example1"},{swift_code:"41D",eline_description:"e-Example2"},{swift_code:"00D",eline_description:"e-Example3"}];

let masterClauses = [{swift_code:"31D",eline_description:"e-Example1"},{swift_code:"41D",eline_description:"e-Example2"}];

// Create an array of unique identifier for the objects in masterClause
let keys = Object.keys(masterClauses.reduce((a, {swift_code, eline_description}) => Object.assign(a, {[swift_code + "_" + eline_description] : undefined}), {}));

// Filter in those elements which are missing from the above array
let filtered = eClauses.filter(({swift_code, eline_description}) => !keys.includes(swift_code + "_" + eline_description))

console.log(filtered);

Answer 2

你可以使用underscore.js这样很容易

var c = _.difference($scope.eClauses.map(e => e.swift_code), $scope.masterClauses.map(e =>e.swift_code));
var array = [];
array = $scope.eClauses.map(e => {
   if(c.includes(e.swift_code)){
     return e;
   }
}).filter(r=>r);

Answer 3

您可以尝试使用以下代码来获取从主列表到原始列表的缺失记录，如下面的代码所示。另请查看您的特定工作示例方案的this plunker链接。

<强>控制器：

$scope.getMissingRecord=function(){
   angular.forEach($scope.eClauses, function(item){
   var index = $scope.masterClauses.map(function(e){ return e.eline_description; }).indexOf(item.eline_description);
      if(index==-1) $scope.notmatching.push(item);
    });
};

模板：

<button type="button" ng-click="getMissingRecord();">Click To Get Unmatched Clauses</button>
<ul ng-repeat="um in notmatching">
  <li>{{um.swift_code}}</li>
  <li>{{um.eline_description}}</li>
</ul>

比较两个JSON数组并获得不匹配的值

3 个答案: