JavaScript: Check whether the provided value is an object created by the Object constructor
JavaScript fundamental (ES6 Syntax): Exercise-192 with Solution
Write a JavaScript program to check whether the provided value is an object created by the Object constructor.
- Check if the provided value is truthy.
- Use typeof to check if it is an object and Object.prototype.constructor to make sure the constructor is equal to Object.
Sample Solution:
JavaScript Code:
//#Source https://bit.ly/2neWfJ2
const isPlainObject = val => !!val && typeof val === 'object' && val.constructor === Object;
console.log(isPlainObject({ a: 1 }));
console.log(isPlainObject(new Map()));
Sample Output:
true false
Flowchart:

Live Demo:
See the Pen javascript-basic-exercise-192-1 by w3resource (@w3resource) on CodePen.
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JavaScript: Tips of the Day
Returns the last element for which the provided function returns a truthy value
Example:
const tips_findLast = (arr, fn) => arr.filter(fn).pop(); console.log(tips_findLast([2, 3, 4, 5, 6], n => n % 2 === 1));
Output:
5
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