Go through numbers in array, stop at 0 and add up previous numbers. Reduce function.
function houseNumbersSum(inputArray) {
var arr = [];
for (var i = 0; i < inputArray.length; i++) {
if(inputArray[i] == 0){
break;
}
arr.push(inputArray[i]);
};
if (arr.length < 1){
return 0;
}
return arr.reduce(function(prev,cur){
return prev + cur;
})
}