3 ms·

Fast arrow functions in Firefox 31

22 points by evilpie 12y ago

scotth 12y ago
This is all well and good, but am I correct in saying that we won't be able to use native arrow functions for years. It's kind of tough to be excited about.
- kevingadd 12y ago
  This is true for pretty much every ES6 feature - lots of them have shipping implementations in Firefox and/or Chrome, but they've all been hidden behind preferences for years, or are slightly out of sync with the spec, or are half-implemented, etc... Notable examples are Map, Set, and WeakMap, all of which have been behind a Chrome preference for years. In particular the lack of WeakMap makes entire classes of applications much harder to implement in Chrome than Firefox.
- pornel 12y ago
  Hopefully improvements like this shipping now will pressure other vendors to catch up. Apart from Apple all major players have short release cycles and automatic updates now, so maybe it won't be that bad.
paraboul 12y ago
FWIW, the real (syntax) name of "=>" is "Fat Arrow". edit: since I get downvoted, source : https://www.google.com/#q=fat+arrow+es6 https://www.google.com/#q=fat+arrow+es6
- deleted 12y ago
  [deleted]
- evilpie 12y ago
  No, see the spec: https://people.mozilla.org/~jorendorff/es6-draft.html#sec-arrow-function-definitions https://people.mozilla.org/~jorendorff/es6-draft.html#sec-ar...
  - paraboul 12y ago
    Ok the draft calls it "arrow function" (how fat arrows are used). I'm talking about how is (some) languages, "=>" is referred as "fat arrow" or "right arrow" as opposed to "->" thin arrow. I mean, I don't invent anything : https://bugzilla.mozilla.org/show_bug.cgi?id=979923 https://bugzilla.mozilla.org/show_bug.cgi?id=979923 https://www.google.com/search?sitesearch=bugzilla.mozilla.org&q=%22fat+arrow%22 https://www.google.com/search?sitesearch=bugzilla.mozilla.or...
- bryanlarsen 12y ago
  If they are called fat arrow, then "fast arrow" is a neat pun and the title is good. If they aren't called fat arrow, then the title is good.
cpeterso 12y ago
You can track browser's ES6 support here: http://kangax.github.io/es5-compat-table/es6 http://kangax.github.io/es5-compat-table/es6 The site's maintainer, kangax, on Firefox's recent ES6 work: https://twitter.com/kangax/status/456219547968614400 https://twitter.com/kangax/status/456219547968614400 Jeez, @Mozilla adding ES6 features faster than I can update compat table #firstworldproblems

22 points by evilpie 12y ago

This is all well and good, but am I correct in saying that we won't be able to use native arrow functions for years. It's kind of tough to be excited about.

kevingadd 12y ago
This is true for pretty much every ES6 feature - lots of them have shipping implementations in Firefox and/or Chrome, but they've all been hidden behind preferences for years, or are slightly out of sync with the spec, or are half-implemented, etc... Notable examples are Map, Set, and WeakMap, all of which have been behind a Chrome preference for years. In particular the lack of WeakMap makes entire classes of applications much harder to implement in Chrome than Firefox.
pornel 12y ago
Hopefully improvements like this shipping now will pressure other vendors to catch up. Apart from Apple all major players have short release cycles and automatic updates now, so maybe it won't be that bad.

paraboul 12y ago

FWIW, the real (syntax) name of "=>" is "Fat Arrow". edit: since I get downvoted, source : https://www.google.com/#q=fat+arrow+es6 https://www.google.com/#q=fat+arrow+es6

deleted 12y ago
[deleted]
evilpie 12y ago
No, see the spec: https://people.mozilla.org/~jorendorff/es6-draft.html#sec-arrow-function-definitions https://people.mozilla.org/~jorendorff/es6-draft.html#sec-ar...
- paraboul 12y ago
  Ok the draft calls it "arrow function" (how fat arrows are used). I'm talking about how is (some) languages, "=>" is referred as "fat arrow" or "right arrow" as opposed to "->" thin arrow. I mean, I don't invent anything : https://bugzilla.mozilla.org/show_bug.cgi?id=979923 https://bugzilla.mozilla.org/show_bug.cgi?id=979923 https://www.google.com/search?sitesearch=bugzilla.mozilla.org&q=%22fat+arrow%22 https://www.google.com/search?sitesearch=bugzilla.mozilla.or...
bryanlarsen 12y ago
If they are called fat arrow, then "fast arrow" is a neat pun and the title is good. If they aren't called fat arrow, then the title is good.

cpeterso 12y ago

You can track browser's ES6 support here: http://kangax.github.io/es5-compat-table/es6 http://kangax.github.io/es5-compat-table/es6 The site's maintainer, kangax, on Firefox's recent ES6 work: https://twitter.com/kangax/status/456219547968614400 https://twitter.com/kangax/status/456219547968614400 Jeez, @Mozilla adding ES6 features faster than I can update compat table #firstworldproblems