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Rest parameters
Learn Rest parameters in ActionScript 3 with a construct-specific explanation, a unique example, a practical boundary, and a mastery check.
Rest parameters is an atomic ActionScript 3 topic inside Loops & Functions. The example below uses the actual construct named by the lesson rather than a generic placeholder.
Focus on what Rest parameters changes: the input, binding, control path, object state, collection, runtime effect, or language contract. Then alter one value and verify that the behavior changes for a reason specific to this feature.
Topic-specific example
function total(...values):Number { var s:Number=0; for each(var n:Number in values){s+=n;} return s;} trace(total(1,2,3));
Change the key input in this ActionScript 3 example and predict the result first; the named construct should be the reason the behavior changes.