Question

如何隔离first_name键以在以下对象中输出其值？

{
    "first_name": "D",
    "last_name": "N",
    "phone_number": 1233414234
}

Answer 1

使用点表示法或使用括号表示法。详细了解property accessors。

var object = { first_name: "D", last_name: "N", phone_number: 1233414234 };

// dot notation
console.log(object.first_name);
 
// bracket notation
console.log(object['first_name']);

对于一组对象，您可以使用Array#map -

var array = [{"first_name":"D","last_name":"N","phone_number": 1233414234},{"first_name":"P","last_name":"T","phone_number": 1233414234}],
   first_names = array.map(function (a) {
       return a.first_name;
   });

console.log(first_names);

Answer 2

您可以使用.或[]

 var x = {"first_name":"D","last_name":"N","phone_number": 1233414234};
 alert(x.first_name);
 alert(x['first_name']);

参考是here。

修改

基于另一个答案中的评论中的OP问题：如果要迭代数组的对象，可以使用每个。

var array = [{"first_name":"D","last_name":"N","phone_number": 1233414234},{"first_name":"P","last_name":"T","phone_number": 1233414234}]; $.each(array, function(idx) { alert(array[idx].first_name); });

OR

var array = [{"first_name":"D","last_name":"N","phone_number": 1233414234},{"first_name":"P","last_name":"T","phone_number": 1233414234}]; $.each(array, function(idx, obj) { alert(obj.first_name); });

如何隔离＆＃34; first_name＆＃34;键在以下对象中输出其值？

2 个答案: