如果数组中的所有对象都具有属性值，则返回true(return true if all objects in array has value in property)

如果数组中的所有对象都具有属性值，则返回true(return true if all objects in array has value in property)

我有一个对象数组，如下所示：

$scope.objectArray = [ {Title: 'object1', Description: 'lorem', Value: 57}, {Title: 'object2', Description: 'ipsum', Value: 32}, {Title: 'object3', Description: 'dolor', Value: 135} ]

我想检查并返回true，如果此数组中的所有对象在属性“值”内都有一个值。

我想我可以用forEach循环来做，但是有没有比这更好的方法？

var isTrue = true; angular.forEach(objectArray, function(o){ if (!o.Value){ isTrue = false; // change variable 'isTrue' to false if no value } });

I have an array of objects, something like this:

$scope.objectArray = [ {Title: 'object1', Description: 'lorem', Value: 57}, {Title: 'object2', Description: 'ipsum', Value: 32}, {Title: 'object3', Description: 'dolor', Value: 135} ]

I would like to check, and return true, if all objects in this array has an value inside the property 'value'.

I think I could do it with an forEach loop, but is there a better way than this?

var isTrue = true; angular.forEach(objectArray, function(o){ if (!o.Value){ isTrue = false; // change variable 'isTrue' to false if no value } });

最满意答案

只要使用Array#every() ，如果0不计数。

var $scope = { objectArray: [{ Title: 'object1', Description: 'lorem', Value: 57 }, { Title: 'object2', Description: 'ipsum', Value: 32 }, { Title: 'object3', Description: 'dolor', Value: 135 }] },
    isTrue = $scope.objectArray.every(function (a) {
        return a.Value;
    });

document.write(isTrue); 
  
 
 
 将0作为值进行测试的解决方案。 
 
 
 
  
  
var $scope = { objectArray: [{ Title: 'object1', Description: 'lorem', Value: 0 }, { Title: 'object2', Description: 'ipsum', Value: 32 }, { Title: 'object3', Description: 'dolor', Value: 135 }] },
    isTrue = $scope.objectArray.every(function (a) {
        return a.Value || a.Value === 0;
    });

document.write(isTrue); 
  
 
Just use Array#every(), if 0 does not count.
 
 
 
  
  
var $scope = { objectArray: [{ Title: 'object1', Description: 'lorem', Value: 57 }, { Title: 'object2', Description: 'ipsum', Value: 32 }, { Title: 'object3', Description: 'dolor', Value: 135 }] },
    isTrue = $scope.objectArray.every(function (a) {
        return a.Value;
    });

document.write(isTrue); 
  
 
 
Solution with test for 0 as a value.
 
 
 
  
  
var $scope = { objectArray: [{ Title: 'object1', Description: 'lorem', Value: 0 }, { Title: 'object2', Description: 'ipsum', Value: 32 }, { Title: 'object3', Description: 'dolor', Value: 135 }] },
    isTrue = $scope.objectArray.every(function (a) {
        return a.Value || a.Value === 0;
    });

document.write(isTrue);