Claude, thanks for answering, one correction at bottom:
Claude Pache <mailto:[email protected]>
September 16, 2013 11:42 AM
I suggest:
[ ... mySet ]
or, if you don't want to use any new syntax:
Array.from(mySet)
—Claude
P.S. The syntax `[e for e of mySet]` is outdated in Harmony, you
should use `[(for let e of mySet) e]`.
No, the new syntax is [for (e of mySet) e] -- no let and parens in the
same place as in the for-of/in loop statements.
/be
Le 16 sept. 2013 à 17:33, Angus Croll <[email protected]
<mailto:[email protected]>> a écrit :
I'm trying to figure out the most painless way, given a set, to
return the set's values as an array.
Possibilities:
1) harmony wiki
(http://wiki.ecmascript.org/doku.php?id=harmony:iterators&s=iterator
<http://wiki.ecmascript.org/doku.php?id=harmony:iterators&s=iterator>) suggests
the following, but it is a syntax error in traceur, continuum and
"node --harmony"
let arr = [e for e of mySet];
2)The ES6 standard supports the following production (i.e.
expression, not var, before 'for'):
/IterationStatement : for ( LeftHandSideExpression of
AssignmentExpression ) Statement/
(see
http://people.mozilla.org/~jorendorff/es6-draft.html#sec-13.6.4.2
<http://people.mozilla.org/%7Ejorendorff/es6-draft.html#sec-13.6.4.2>)
which suggests I should be able to do this:
let arr = [];
for (arr[arr.length-1] of mySet);
(I can do the equivalent with for-in) but that also errors in the
above three transpilers
3) So then I'm left with the pedestrian:
let arr = [];
for (e of mySet) {
arr.push(e);
}
4) I also wondered ifArray.from(mySet) would do the trick but again
doesn't seem to pass muster with any of the above transpilers.
(continuum returns a zero length array and the other two don't know
Array.from)
Wondering if I'm missing something better.
thanks
Angus
@angustweets
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Angus Croll <mailto:[email protected]>
September 16, 2013 11:33 AM
I'm trying to figure out the most painless way, given a set, to return
the set's values as an array.
Possibilities:
1) harmony wiki
(http://wiki.ecmascript.org/doku.php?id=harmony:iterators&s=iterator
<http://wiki.ecmascript.org/doku.php?id=harmony:iterators&s=iterator>)
suggests the following, but it is a syntax error in traceur, continuum
and "node --harmony"
let arr = [e for e of mySet];
2)The ES6 standard supports the following production (i.e. expression,
not var, before 'for'):
/IterationStatement : for ( LeftHandSideExpression of
AssignmentExpression ) Statement/
(see http://people.mozilla.org/~jorendorff/es6-draft.html#sec-13.6.4.2
<http://people.mozilla.org/%7Ejorendorff/es6-draft.html#sec-13.6.4.2>)
which suggests I should be able to do this:
let arr = [];
for (arr[arr.length-1] of mySet);
(I can do the equivalent with for-in) but that also errors in the
above three transpilers
3) So then I'm left with the pedestrian:
let arr = [];
for (e of mySet) {
arr.push(e);
}
4) I also wondered ifArray.from(mySet) would do the trick but again
doesn't seem to pass muster with any of the above transpilers.
(continuum returns a zero length array and the other two don't know
Array.from)
Wondering if I'm missing something better.
thanks
Angus
@angustweets
_______________________________________________
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
