> no, comma is the lowest precedence of any operator. I think you might have misunderstood what I was saying?
ConciseBody -> AssignmentExpression -> comma is not a part of the ConciseBody -> you probably get a SyntaxError unless the arrow function is passed as a parameter to a function So: `var a = (x) => 1, 2;` -> syntax error (not a VariableDeclaration) Is all I was saying. > On Mar 14, 2015, at 3:52 PM, Allen Wirfs-Brock <[email protected]> wrote: > > > On Mar 14, 2015, at 12:37 PM, Caitlin Potter wrote: > >> ConciseBody is an AssignmentExpression in this case, so I believe the comma >> is a syntax error. > > no, comma is the lowest precedence of any operator. > > hence: > > a=1,2 > > parses as: > > (a=1),2 > > and > > a=()=>1,2 > > parses as: > > (a=()=>1),2 > > Finally, note that > > console.log(a=1,2) > > assigns the value 1 to a, but outputs 2 > > Allen > > >> >> >> >>> On Mar 14, 2015, at 3:29 PM, Biju <[email protected]> wrote: >>> >>> I was looking into Firefox implementation of Arrow functions >>> >>> And noticed this >>> >>> function a(){return 1,2}; >>> a(); >>> >>> gives "2" >>> >>> >>> But with same with Arrow functions >>> >>> a=()=>1,2; >>> a(); >>> >>> >>> gives "1" >>> >>> >>> To get answer "2" in Arrow functions you need parentheses, like >>> >>> a=()=>(1,2); >>> a(); >>> >>> >>> >>> Is this expected ? >>> >>> >>> >>> Cheers >>> GC >>> _______________________________________________ >>> es-discuss mailing list >>> [email protected] >>> https://mail.mozilla.org/listinfo/es-discuss >> >> _______________________________________________ >> es-discuss mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/es-discuss >> > _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
