Question

我有一个Json对象。

       [{
"id":"1",
"username": "vishnu",
"FromDate": "Wed Mar 02 2016 10:56:45 GMT+0530 (India Standard Time)",
"selectedProject": "createwhimsy",
"task": "fixing bugs",
"time": "1"
  }, {

"id":"2",
"username": "seenu",
"FromDate": "Wed Mar 02 2016 10:56:45 GMT+0530 (India Standard Time)",
"selectedProject": "createwhimsy",
"task": "working on ui",
"time": "2"
   }, {
"id":"3",
"username": "sam",
"FromDate": "Wed Mar 02 2016 10:56:45 GMT+0530 (India Standard Time)",
"selectedProject": "bigiron",
"task": "working on api",
"time": "5"
 },
    {
"id":"4",
"username": "vishnu",
"FromDate": "Wed Mar 03 2016 10:56:45 GMT+0530 (India Standard Time)",
"selectedProject": "timetracker",
"task": "ui designing",
"time": "1"
   },{
"id":"5",
"username": "arun",
"FromDate": "Wed Jan 02 2016 10:56:45 GMT+0530 (India Standard Time)",
"selectedProject": "createwhimsy",
"task": "fixing bugs",
"time": "1"
  }, {
"id":"6",
"username": "seenu",
"FromDate": "Wed Mar 01 2016 10:56:45 GMT+0530 (India Standard Time)",
"selectedProject": "createwhimsy",
"task": "working on ui",
"time": "2"
    }, {
"id":"7",
"username": "sam",
"FromDate": "Wed Mar 03 2016 10:56:45 GMT+0530 (India Standard Time)",
"selectedProject": "createwhimsy",
"task": "working on api",
"time": "6"
 },
   {
"id":"8",
"username": "vishnu",
"FromDate": "Wed Mar 03 2016 10:56:45 GMT+0530 (India Standard Time)",
"selectedProject": "timetracker",
"task": "ui designing",
"time": "4"
    }]

我想制作一个自定义过滤器来过滤特定用户（根据用户名），并从过滤后的数据中获取长度。例如，用户名：Vishnu，我想过滤并检查用户名Vishnu有多少个对象。像那样，我希望得到所有用户。

我创建了一个自定义过滤器，如（类型代码，不正确），

   app.filter('myfilter',function(){
 return function(mydata){
 var filterd data=[];
angular.foreach(mydata,function(s){
 if(s.name==$scope.model)
 {
filtereddata.push(s)
  }
 })
 return filtereddata;
}
  });

现在该怎么办？

Answer 1

使用

s.name.indexOf($scope.model)>-1

而不是

s.name==$scope.model

用于喜欢搜索或包含搜索

Answer 2

您可以返回filtereddata.length吗？

而不是filtereddata

Answer 3

根据评论

创建的示例

<强> HTML

<body ng-app="myApp">
    <div ng-controller="Ctrl">Search:
        <input ng-model="searchText">
        <div ng-repeat="(k,v) in items | myFilter:searchText">
            {{v}}
         </div>
    </div>
</body>

<强> JS

var myApp = angular.module('myApp', []);

myApp.controller('Ctrl', function($scope) {

  $scope.items = [{
    "id": "1",
    "username": "vishnu",
    "FromDate": "Wed Mar 02 2016 10:56:45 GMT+0530 (India Standard Time)",
    "selectedProject": "createwhimsy",
    "task": "fixing bugs",
    "time": "1"
  }, {

    "id": "2",
    "username": "seenu",
    "FromDate": "Wed Mar 02 2016 10:56:45 GMT+0530 (India Standard Time)",
    "selectedProject": "createwhimsy",
    "task": "working on ui",
    "time": "2"
  }, {
    "id": "3",
    "username": "sam",
    "FromDate": "Wed Mar 02 2016 10:56:45 GMT+0530 (India Standard Time)",
    "selectedProject": "bigiron",
    "task": "working on api",
    "time": "5"
  }, {
    "id": "4",
    "username": "vishnu",
    "FromDate": "Wed Mar 03 2016 10:56:45 GMT+0530 (India Standard Time)",
    "selectedProject": "timetracker",
    "task": "ui designing",
    "time": "1"
  }, {
    "id": "5",
    "username": "arun",
    "FromDate": "Wed Jan 02 2016 10:56:45 GMT+0530 (India Standard Time)",
    "selectedProject": "createwhimsy",
    "task": "fixing bugs",
    "time": "1"
  }, {
    "id": "6",
    "username": "seenu",
    "FromDate": "Wed Mar 01 2016 10:56:45 GMT+0530 (India Standard Time)",
    "selectedProject": "createwhimsy",
    "task": "working on ui",
    "time": "2"
  }, {
    "id": "7",
    "username": "sam",
    "FromDate": "Wed Mar 03 2016 10:56:45 GMT+0530 (India Standard Time)",
    "selectedProject": "createwhimsy",
    "task": "working on api",
    "time": "6"
  }, {
    "id": "8",
    "username": "vishnu",
    "FromDate": "Wed Mar 03 2016 10:56:45 GMT+0530 (India Standard Time)",
    "selectedProject": "timetracker",
    "task": "ui designing",
    "time": "4"
  }]
});


myApp.filter('myFilter', function() {
  return function(items, search) {
    var result = [];
    angular.forEach(items, function(value, key) {
      angular.forEach(value, function(value2, key2) {
        if (value2 === search) {
          result.push(value2);
        }
      })
    });
    return result;

  }
});

工作Jsfiddle演示

Answer 4

您只需以这种方式使用自定义过滤器：过滤器名称加上过滤器后缀。

然后在控制器中简单地使用它：

localparam S_IDLE  = 2'b00;
localparam S_RIGHT = 2'b10;
localparam S_LEFT  = 2'b01;
localparam BOTH  = 2'b11;

reg  [1:0] state;
wire [1:0] next_state = {r,l};//bypass toggle flops

always @(posedge slowclk) begin 
  case(next_state) 
    S_IDLE  : state <= S_IDLE ;
    S_RIGHT : state <= S_RIGHT;
    S_LEFT  : state <= S_LEFT ;
    S_BOTH  : state <= S_IDLE ;
  endcase
end

//Outputs
always @(posedge slowclk) begin 
  case(state) 
    S_IDLE   : led <= led;
    S_RIGHT  : led <= led>>1;
    S_LEFT   : led <= led<<1;
    default  : led <= led;
  endcase
end

现在function myCtrl($scope, filterFilter) { var filteredRes = filterFilter(data, searchQuery); }为您提供与搜索查询匹配的结果长度。

如何按用户名过滤？

4 个答案: