Dmitry A. Soshnikov: > In JS |x| can be placed outside, and then some special name won't be > needed at all: > > [1, 2, 3].map((x) {x * x}).
Wouldn’t this have the same problem that Oliver mentioned? Only in this case the ambiguity would be whether the “(x)” is a parenthesized expression or the introduction of the anonymous function. Sam Ruby: > [0,1,2,3].map {|x| x*x} > > (try it in 'irb' to see what I mean) > > While I don't believe that would fly here, perhaps adding parens > around the function would: > > [0,1,2,3].map({|x| x*x}) I think having the braces on the outside would help with the aforementioned problem. The vertical bars don’t particularly grab me (not being a Rubyist), but this does: [0, 1, 2, 3].map({ x => x * x }); // optionally { (x) => x * x }? function mapPairs(o, f) { for (var p in o) { f(p, o[p]); } } mapPairs(someObject, { (a, b) => a + '=' + b) }); (Sorry for adding more options to the discussion — quick rebuttals as to why the above wouldn’t work welcome.) -- Cameron McCormack ≝ http://mcc.id.au/ _______________________________________________ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss