On 11.11.2011 14:52, Axel Rauschmayer wrote:
which I thought could be turned into: ----- var C = { let something;// |this| is the global object // ... } ----- But it does not have a return value and as noted in your second message, there seems to be an ambiguity with object initializers (not only visual but formal). The 'do expressions' solution sounds like a good idea, but visually reminds of a do-while loop. I don't really have a better proposition yet, but i'm looking forward to seeing any solution that will allow to replace all "(function(global){...})(this);"IIRC: Block lambdas. var C = {|| // note the double pipe let something; // |this| is the global object // ... return something; } With a single expression, you don’t even have to return: var C = {|| // note the double pipe foo() }
This contradicts TCP though. E.g. Ruby supports it and there we can't `return` from blocks, since block wrapping should not be treated as a function.
OTOH, as I noted in the initial letter, it can be convenient to return from the middle of such a block with exactly `return` statement. But, it's again contradicts TCP, and `return` should exit exactly execution context, but not just a block. Exactly for this it's used in Ruby, when begin inside a function you may exit directly from the function using `return` from the block passed to a higher-order function, e.g. `each` or arrays.
Besides, if to accept this Ruby's blocks, then in common case -- e.g. as shorted notation for functional arguments.
Dmitry. _______________________________________________ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
