檢查範圍內是否有值

Question

我有一個名爲$scope.activities的範圍。在該範圍內是多個對象。每個對象都有一個名爲viewed的字符串，值爲check或uncheck。我想檢查值是否存在uncheck。

我已經創建了這個，但它似乎沒有工作。

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

因爲在activities我有兩個目的，一個與所述uncheck值，沒有它目的。

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

Answer 1

你必須循環每個對象和檢查屬性 - 您可以使用Array.some

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

Answer 2

你必須遍歷數組和測試中的每個對象，如果屬性「觀察」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));