How to create a custom function similar to find() method in JavaScript?

Let’s say we have the following records of studentId and studentName and want to check a specific student name −

const studentDetails=
[
   {
      studentId:101,
      studentName:"John"
   },
   {
      studentId:102,
      studentName:"David"
   },
   {
      studentId:103,
      studentName:"Carol"
   }
]

Create a custom function to find by name. Following is the code −

Example

const studentDetails=
[
   {
      studentId:101,
      studentName:"John"
   },
   {
      studentId:102,
      studentName:"David"
   },
   {
      studentId:103,
      studentName:"Carol"
   }
]
function findByName(name){
   var flag=true;
   for(var i=0;i<studentDetails.length;i++){
      if(studentDetails[i].studentName==name){
         flag=true;
         break
      } else{
         flag=false;
      }
   }
   if(flag==true){
      console.log("The name found="+name);
   } else{
      console.log("The name not found="+name);
   }
}
findByName("David");

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

node fileName.js.

Here, my file name is demo106.js.

Output

This will produce the following output −

PS C:\Users\Amit\JavaScript-code> node demo106.js
The name found=David