If you want to calculate totals or summaries of data stored in Array, you can use JavaScript functional style capabilities, namely .reduce().
Just create your summary function like this :
//lambda syntax
const isum = (acc,val) => acc + val
function izeros(acc,val) { return val == 0 ? acc + 1 : acc}
function inon_zeros(acc,val) { return val == 0 ? acc : acc + 1}
ary = [1,2,3,0,0,0,0]
console.log(ary.reduce(isum,0))
console.log(ary.reduce(izeros,0))
console.log(ary.reduce(inon_zeros,0))
----
Output:
6
4
3
You can try it here : https://onecompiler.com/javascript/3xjg9tyjt
