{{ "lower cap string" | uppercase }}   //结果：LOWER CAP STRING 
{{ "TANK is GOOD" | lowercase }}     //结果：tank is good

{{ {foo: "bar", baz: 23} | json }}  //结果：{ "foo": "bar", "baz": 23 } 

{{ 1304375948024 | date }}             //结果：May 3, 2011 
{{ 1304375948024 | date:"MM/dd/yyyy @ h:mma" }}   //结果：05/03/2011 @ 6:39AM 
{{ 1304375948024 | date:"yyyy-MM-dd hh:mm:ss" }}  //结果：2011-05-03 06:39:08 

{{ 1.234567 | number:1 }}  //结果：1.2 
{{ 1234567 | number }}    //结果：1,234,567 

{{ 250 | currency }}         //结果：$250.00 
{{ 250 | currency:"RMB ￥ " }}    //结果：RMB ￥ 250.00 

{{ [{"age": 20,"id": 10,"name": "iphone"}, 
{"age": 12,"id": 11,"name": "sunm xing"}, 
{"age": 44,"id": 12,"name": "test abc"} 
] | filter:'s'}}  //查找含有有s的行 
 
//上例结果：[{"age":12,"id":11,"name":"sunm xing"},{"age":44,"id":12,"name":"test abc"}] 
 
{{ [{"age": 20,"id": 10,"name": "iphone"}, 
{"age": 12,"id": 11,"name": "sunm xing"}, 
{"age": 44,"id": 12,"name": "test abc"} 
] | filter:{'name':'iphone'} }}  //查找name为iphone的行 
 
//上例结果:[{"age":20,"id":10,"name":"iphone"}] 

{{ "i love tank" | limitTo:6 }}      //结果：i love 
{{ "i love tank" | limitTo:-4 }}     //结果：tank 
 
{{ [{"age": 20,"id": 10,"name": "iphone"}, 
{"age": 12,"id": 11,"name": "sunm xing"}, 
{"age": 44,"id": 12,"name": "test abc"} 
] | limitTo:1 }}   //结果：[{"age":20,"id":10,"name":"iphone"}] 

{{ [{"age": 20,"id": 10,"name": "iphone"}, 
{"age": 12,"id": 11,"name": "sunm xing"}, 
{"age": 44,"id": 12,"name": "test abc"} 
] | orderBy:'id':true }}    //根id降序排 
 
{{ [{"age": 20,"id": 10,"name": "iphone"}, 
{"age": 12,"id": 11,"name": "sunm xing"}, 
{"age": 44,"id": 12,"name": "test abc"} 
] | orderBy:'id' }}      //根据id升序排 

angular.module('tanktest', []).filter('tankreplace', function() { 
  return function(input) { 
    return input.replace(/tank/, "=====") 
  }; 
}); 

var phonecatApp = angular.module('phonecatApp', [ 
 'ngRoute', 
 'phonecatControllers', 
 'facebookControllers', 
 'tanktest' 
]); 

{{ "TANK is GOOD" | lowercase |tankreplace}}  //结果：===== is good 

{{ expression | filter }}

{{ expression | filter1 | filter2 | ... }}

{{ expression | filter:argument1:argument2:... }}

<span ng-repeat="a in array | filter ">

app.controller('testC',function($scope,currencyFilter){
  $scope.num = currencyFilter(123534); 
}

app.controller('testC',function($scope,$filter){
  $scope.num = $filter('currency')(123534);
　　$scope.date = $filter('date')(new Date()); 
}