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#2695 - Array Wrapper
Problem Description
Create a class ArrayWrapper that accepts an array of integers in its constructor.
This class should have two features:
- When two instances of this class are added together with the + operator, the resulting value is the sum of all the elements in both arrays.
- When the String() function is called on the instance, it will return a comma separated string surrounded by brackets. For example, [1,2,3].
Solution
/**
* @param {number[]} nums
* @return {void}
*/
var ArrayWrapper = function(nums) {
this.nums = nums;
};
/**
* @return {number}
*/
ArrayWrapper.prototype.valueOf = function() {
return this.nums.reduce((sum, n) => sum + n, 0);
};
/**
* @return {string}
*/
ArrayWrapper.prototype.toString = function() {
return JSON.stringify(this.nums);
};