Dear all,
We've talked about various let-binding forms in the past, and the
let-declaration form has pretty wide support. The other two forms proposed for
ES4 were more controversial. I've just posted a small strawman proposal for let
expressions that brings this down to just one additional form, and ends up
being more useful to boot-- you can *both* execute statements *and* produce a
result value. A quick example:
f(let (a = getArray()) {
if (x.length === 0)
throw "empty array";
=> a[0]
})
Read all about it here:
http://wiki.ecmascript.org/doku.php?id=strawman:let_expressions
The proposal is short, but hopefully it gets the point across. I'd be more than
happy to discuss it here. Comments most welcome!
Dave
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