在[重复]中从现有数组创建新数组

Question

我有一个现有的数组，如下所示

"activeSubject": [
        {
            "subject_id": "Class Teacher",
            "subject_name": "Class Teacher",
            "status": "2"
        },
        {
            "subject_id": "Academic Leader (Head)",
            "subject_name": "Academic Leader (Head)",
            "status": "2"
        },
        {
            "subject_id": "15",
            "subject_name": "Physics",
            "status": "2"
        }
    ]

然后我想创建一个新的数组，如下所示

"new_subjects": [
        {
            "value": "Class Teacher",
        },
        {
            "value": "Academic Leader (Head)",
        },
        {
            "value": "Physics",
        }
    ]

我已经通过map()方法尝试过了

js prettyprint-override">var objA = this.state.activeSubject.map(o => ({
          [o]: { value: o.subject_name}
        }))

但是它没有给出一个正确的数组，请帮助我解决这个问题

Answer 1

您的map语法非常奇怪，我不知道您尝试做了什么，但这应该足够了；）

js prettyprint-override">this.state = {"activeSubject": [
    {
        "subject_id": "Class Teacher",
        "subject_name": "Class Teacher",
        "status": "2"
    },
    {
        "subject_id": "Academic Leader (Head)",
        "subject_name": "Academic Leader (Head)",
        "status": "2"
    },
    {
        "subject_id": "15",
        "subject_name": "Physics",
        "status": "2"
    }
]};

var objA = this.state.activeSubject.map(o => ({ value: o.subject_name}));
console.log(objA);