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  • another rivertrail question

another rivertrail question

# Norm Rubin (12 years ago)

In an elemental function does throwing an error, count as a side effect?

For instance

V2 = new Array(10, function(){return 23} ,14)

V1 = ParallelArray(14,12,10)

V1.map( function(e,i) { var temp = array[e-12] = v2[i].toFixed() ; ... })

Since the toFixed will throw a type error when i =1, and a range error when e = 10

If this is a side effect, then it is not an elemental function and should throw Error, not typeError or rangeError

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# Hudson, Rick (12 years ago)

TypeError instanceof Error is true so an implementation is free to throw TypeError.

It does not count as a side effect.

What happens when a kernel throws an exception is not covered in the strawman.

I suggest that an exception coming from within a kernel function will result in an exception being thrown from the high level ParallelArray method. If more than one kernel throws an exception the ParallelArray method is free to choose which one is thrown to its caller.