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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
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