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Function expressions
Learn Function expressions in ActionScript 3 with a construct-specific explanation, a unique example, a practical boundary, and a mastery check.
Function expressions 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 Function expressions 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
var square:Function=function(n:Number):Number{return n*n;}; trace(square(6));
Change the key input in this ActionScript 3 example and predict the result first; the named construct should be the reason the behavior changes.