详解angular ui-grid之过滤器设置

var app = angular.module('app', ['ui.grid', 'ui.grid.edit']);  app.controller('MainCtrl', ['$scope', '$http', function ($scope, $http) {  $scope.gridOptions = {   columnDefs: [    { field: 'name' },    { field: 'amount', name: 'Number', cellFilter: 'fractionFilter' },    { field: 'amount', name: 'Currency', cellFilter: 'currencyFilter:this' }   ]  };    $http.get('data.json')  .success(function (data) {   $scope.gridOptions.data = data;  }); }])  .filter('fractionFilter', function () {  return function (value) {   return value.toFixed(0);  }; })  .filter('currencyFilter', function () {  var currencyMap = {   'dollar': '$',   'pound': '£',   'euro': '  };    return function (value, scope) {   return currencyMap[scope.row.entity.currency] + value.toFixed(2);  }; })