JavaScript: Delete a property from an object and print before or after deleting
JavaScript Object: Exercise-2 with Solution
Write a JavaScript program to delete the rollno property from the following object. Also print the object before or after deleting the property.
Sample object:
var student = {
name : "David Rayy",
sclass : "VI",
rollno : 12 };
Sample Solution:-
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Delete a property from an object</title>
</head>
<body>
</body>
</html>
JavaScript Code:
var student = {
name : "David Rayy",
sclass : "VI",
rollno : 12 };
console.log(student);
delete student.rollno;
console.log(student);
Sample Output:
{"name":"David Rayy","sclass":"VI","rollno":12} {"name":"David Rayy","sclass":"VI"}
Flowchart:

Live Demo:
See the Pen javascript-object-exercise-2 by w3resource (@w3resource) on CodePen.
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JavaScript: Tips of the Day
Creates a function that accepts up to n arguments, ignoring any additional arguments
Example:
const ary = (fn, n) => (...args) => fn(...args.slice(0, n)); const tips_firstTwoMax = ary(Math.max, 2); console.log([[3, 5, 'p'], [4, 8, 12], [15]].map(x => tips_firstTwoMax(...x)));
Output:
[5,8,15]
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