Syntax error The best way to remove duplicates from an array of objects in JavaScript?

The best way to remove duplicates from an array of objects in JavaScript?

Let’s say the following is our array of objects with duplicates −

var studentDetails=[
   {studentId:101},
   {studentId:104},
   {studentId:106},
   {studentId:104},
   {studentId:110},
   {studentId:106},
]

Use the concept of set to remove duplicates as in the below code −

Example

var studentDetails=[
   {studentId:101},
   {studentId:104},
   {studentId:106},
   {studentId:104},
   {studentId:110},
   {studentId:106},
]
const distinctValues = new Set
const withoutDuplicate = []
for (const tempObj of studentDetails) {
   if (!distinctValues.has(tempObj.studentId)) {
      distinctValues.add(tempObj.studentId)
      withoutDuplicate.push(tempObj)
   }
}
console.log(withoutDuplicate);

To run the above program, you need to use the following command −

node fileName.js.

Output

Here, my file name is demo158.js. This will produce the following output −

PS C:\Users\Amit\JavaScript-code> node demo158.js
[
   { studentId: 101 },
   { studentId: 104 },
   { studentId: 106 },
   { studentId: 110 }
]
Updated on: 2020-09-12T07:44:33+05:30

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