javascript - Angular如何在json数组中显示键

Question

我有以下 JSON 对象数组:

"employees":[
    {"firstName":"John", "lastName":"Doe"}, 
    {"firstName":"Anna", "lastName":"Smith"}, 
    {"firstName":"Peter","lastName":"Jones"}
]

我想获取 JSON 数组中的特定键:

for (var ke in employees) {
       if (employees.hasOwnProperty(ke)) {
             console.log(employees[ke].lastName);
       };

但是它不起作用!!

Answer 1

您在 for 循环末尾缺少一个右大括号，它应该是:

for (var ke in employees) {
   if (employees.hasOwnProperty(ke)) {
         console.log(employees[ke].lastName);
   };
}

Demo

但是，您可以使用 angular.forEach相反，像这样:

angular.forEach(employees, function (ke) {
    if(ke.lastName) {
        console.log(ke.lastName);
    }
});

Demo