检查范围内是否有值

Question

我有一个名为$scope.activities的范围。在该范围内是多个对象。每个对象都有一个名为viewed的字符串，值为check或uncheck。我想检查值是否存在uncheck。

我已经创建了这个，但它似乎没有工作。

if (activities.indexOf("uncheck") == -1) { 
    console.log ('uncheck found') 
    $scope.newActivities = 'newActivities'; 
} else { 
    console.log ('no uncheck found') 
} 

因为在activities我有两个目的，一个与所述uncheck值，没有它目的。

[{"id":2,", "viewed":"check"}, {"id":3,", "viewed":"uncheck"}] 

Answer 1

你必须循环每个对象和检查属性 - 您可以使用Array.some

var hasValue = activities.some(function(obj) { return obj.viewed == "unchecked" }); 

Answer 2

你必须遍历数组和测试中的每个对象，如果属性“观察”等以 “unchek”

var activities = [{"id":2, "viewed":"check"}, {"id":3, "viewed":"uncheck"}]; 
var activities2 = [{"id":2, "viewed":"check"}, {"id":3, "viewed":"check"}]; 
var check = function(data){ 
    var checked = false; 
    for(var i in data){ 
     if(data[i].hasOwnProperty("viewed") && (data[i]["viewed"]=="uncheck")){ 
      checked = true ; 
     } 
    } 
    return checked; 
} ; 

console.log(check(activities)); 
console.log(check(activities2));