如何删除数组中的重复属性值 - JavaScript?
javascriptweb developmentfront end technologyobject oriented programming
假设以下是我们的数组减法
var details = [
{
studentName: "John",
studentMarks: [78, 98]
},
{
studentName: "David",
studentMarks: [87, 87]
},
{
studentName: "Bob",
studentMarks: [48, 58]
},
{
studentName: "Sam",
studentMarks: [98, 98]
},
]
我们需要删除重复的属性值，即 87 在上面重复出现。我们需要将其删除。
为此，使用 map() 的概念。
示例
以下是代码 −
var details = [
{
studentName: "John",
studentMarks: [78, 98]
},
{
studentName: "David",
studentMarks: [87, 87]
},
{
studentName: "Bob",
studentMarks: [48, 58]
},
{
studentName: "Sam",
studentMarks: [98, 98]
},
]
details.map(tempObj => {
if (typeof (tempObj.studentMarks) == 'object') {
tempObj.studentMarks = [... new Set(tempObj.studentMarks)]
if (tempObj.studentMarks.length == 1) {
tempObj.studentMarks = tempObj.studentMarks[0]
}
}
});
console.log(details);
要运行上述程序，您需要使用以下命令 −
node fileName.js.
这里，文件名是 demo292.js。
输出
这将在控制台上产生以下输出 −
PS C:\Users\Amit\javascript-code> node demo292.js
[
{ studentName: 'John', studentMarks: [ 78, 98 ] },
{ studentName: 'David', studentMarks: 87 },
{ studentName: 'Bob', studentMarks: [ 48, 58 ] },
{ studentName: 'Sam', studentMarks: 98 }
]
