The blog post http://yehudakatz.com/2012/01/10/javascript-needs-blocks/ makes the case for blocks that act like functions when passed as arguments but have loop-up rules more like nested blocks.
Of course these are called 'block lambdas', and I suggest that this is a problem. Given that very few programmers understand lambda calculus (and this will not change), the word 'lambda' is equivalent to "too difficult to understand". When I looked up lambda on http://en.wikipedia.org/wiki/Lambda I read In mathematical logic <http://en.wikipedia.org/wiki/Mathematical_logic> and computer science <http://en.wikipedia.org/wiki/Computer_science>, lambda is used to introduce an anonymous function<http://en.wikipedia.org/wiki/Anonymous_function> expressed with the concepts of lambda calculus<http://en.wikipedia.org/wiki/Lambda_calculus> . and then "Oh that is what they meant with all that 'block-lambda' stuff". If the discussion here were on a new ES feature "anonymous methods", then I guess many more developers would be interested. If this feature had the properties outlined in the blog post, then I think many developers would understand the value of this potential feature. As it is I guess they stop reading as soon as they see the word 'lambda'. jjb
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