How to early break reduce() method?

Question

How can I break the iteration of reduce() method?

for:

for (var i = Things.length - 1; i >= 0; i--) {
  if(Things[i] <=         


        

Answer 1

You can break every code - and thus every build in iterator - by throwing an exception:

function breakReduceException(value) {
    this.value = value
}

try {
    Things.reduce(function(memo, current) {
        ...
        if (current <= 0) throw new breakReduceException(memo)
        ...
    }, 0)
} catch (e) {
    if (e instanceof breakReduceException) var memo = e.value
    else throw e
}