Assume you are given an int variable named nPositive and a two-dimensional array of ints that has been created and assigned to a2d. Write some statements that compute the number of all the elements in the entire two-dimensional array that are greater than zero and assign the value to nPositive.

const a2d =  [[7,28, 92], [0,11,-55], [109, -25, -733]];

let nPositive = a2d.reduce((a,c) => a + c.filter(n => n>0).length, 0);

console.log(nPositive);

Explanation:

Just for fun, I want to share the solution in javascript when using the powerful list operations. It is worthwhile learning to understand function expressions and the very common map(), reduce() and filter() primitives!