如何将键值对数组转换为以第一个数组的值作为键的对象？

Question

我的后端返回如下数据。

   var permissions = [{"PermCode":"BOF","IsvalidPerm":true},{"PermCode":"CM","IsvalidPerm":false},{"PermCode":"CV","IsvalidPerm":true},{"PermCode":"DAS","IsvalidPerm":true},{"PermCode":"RPT","IsvalidPerm":true},{"PermCode":"VM","IsvalidPerm":true}]

如何将其转换为如下所示的Objectof对象

{BOF:true,CM:true, ...}

谢谢。

Answer 1

您可以使用某些ES6语法，例如使用Object.assign，扩展语法，计算出的属性，然后它实际上具有非常好的功能性编程风格：

var permissions = [{"PermCode":"BOF","IsvalidPerm":true},{"PermCode":"CM","IsvalidPerm":false},{"PermCode":"CV","IsvalidPerm":true},{"PermCode":"DAS","IsvalidPerm":true},{"PermCode":"RPT","IsvalidPerm":true},{"PermCode":"VM","IsvalidPerm":true}];

const result = Object.assign(...permissions.map(
    ({PermCode, IsvalidPerm}) => ({[PermCode]: IsvalidPerm})
));

console.log(result);

Answer 2

尽管您可以在 <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent"> <android.support.v4.view.ViewPager android:id="@+id/viewPagerGaleria" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="8dp" app:layout_constraintTop_toBottomOf="@id/pageIndicatorView"> </android.support.v4.view.ViewPager> //Forget about this, is just a indicator <com.rd.PageIndicatorView android:id="@+id/pageIndicatorView" android:layout_width="wrap_content" app:layout_constraintBottom_toTopOf="@id/viewPagerGaleria" app:layout_constraintRight_toRightOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:piv_padding="50dp" app:piv_animationType="scale" app:piv_viewPager="@id/viewPagerGaleria" android:layout_height="wrap_content" /> </android.support.constraint.ConstraintLayout> 的文档中找到答案（免责声明：它是Array），但对于单线而言，语法有些棘手。

您在这里：

map

对于您的编辑，如果要创建对象，请使用const data = [ {"PermCode":"BOF","IsvalidPerm":true}, {"PermCode":"CM","IsvalidPerm":false}, {"PermCode":"CV","IsvalidPerm":true}, {"PermCode":"DAS","IsvalidPerm":true}, {"PermCode":"RPT","IsvalidPerm":true}, {"PermCode":"VM","IsvalidPerm":true} ]; const formatted = data.map(item => ({[item.PermCode]: item.IsvalidPerm})); console.log(formatted);：

reduce

Answer 3

请始终在OP中显示您的尝试，以便我们了解您的移动方向。

您可以像下面那样使用“ Array.map”和“ Object.assign”

var permissions = [{"PermCode":"BOF","IsvalidPerm":true},{"PermCode":"CM","IsvalidPerm":false},{"PermCode":"CV","IsvalidPerm":true},{"PermCode":"DAS","IsvalidPerm":true},{"PermCode":"RPT","IsvalidPerm":true},{"PermCode":"VM","IsvalidPerm":true}]

let result = Object.assign(...permissions.map(d => ({ [d.PermCode]: d.IsvalidPerm})))

console.log(result)