Challenge Condense Arrays With Reduce - ashish9342/FreeCodeCamp GitHub Wiki
Reduce can be useful for condensing an array of numbers into one value.
var array = [4,5,6,7,8];
var singleVal = 0;
// Only change code below this line.
var singleVal = array.reduce(function(previousVal, currentVal){
return previousVal+currentVal;
});