> Yes, although it's not implemented in V8 just yet. I was wrong (and happy about it)! This is working in the latest unstable version of node/v8:
$ node -e 'console.log(process.versions.v8)' 3.20.2 $ node --harmony-iteration --harmony-generators > function* gen() { yield 'foo'; yield 'bar'; } undefined > for (var item of gen()) { console.log(item); } foo bar Awesome! Not sure how I missed that this was added... On Tuesday, July 16, 2013 9:13:26 AM UTC-4, jmar777 wrote: > > > That for...of syntax is very nice, is it an official part of ECMAScript > 6? > > Yes, although it's not implemented in V8 just yet. Once for-of and > generator-expressions are implemented, a lot of these operations will > become a lot nicer at the language level (rather than relying on cludgy > `suspend.map()` or whatever helpers). > > Here's an example from the ES6 Wiki [1]: > > (xhrGet(url) for (url of getURLs())) // hawt > > [1] http://wiki.ecmascript.org/doku.php?id=harmony:generator_expressions > > On Tuesday, July 16, 2013 2:36:44 AM UTC-4, cpprototypes wrote: >> >> The code sample I posted was a simplified example to demonstrate the >> issue. The actual command line script I was working on uses the response >> from the get request for other things. That for...of syntax is very nice, >> is it an official part of ECMAScript 6? >> >> >> On Friday, July 12, 2013 2:47:28 PM UTC-7, cpprototypes wrote: >>> >>> I'm using node 0.11.3 with --harmony-generators to try the new feature. >>> I found two libraries that should help use existing node callback-based >>> code with generators (suspend and galaxy). The code I'm trying to run was >>> similar to the following: >>> >>> (using suspend) >>> >>> var fs = require('fs'); >>> var request = require('request'); >>> >>> suspend(function* (resume) { >>> var contents = yield fs.readFile('idList.json', 'utf8', resume); >>> contents.split('\n').forEach(function(id) { >>> var info = yield request.get('http://www.example.com?id='+id, >>> resume); >>> }); >>> })(); >>> >>> (using galaxy) >>> >>> var galaxy = require('galaxy'); >>> var fs = galaxy.star(require('fs')); >>> var request = galaxy.star(require('request')); >>> >>> function* main() { >>> var contents = yield fs.readFile('idList.json', 'utf8'); >>> contents.split('\n').forEach(function(id) { >>> var info = yield request.get('http://www.example.com?id='+id); >>> }); >>> }; >>> >>> galaxy.unstar(main)(function(err, result) { >>> console.log('done'); >>> }); >>> >>> Using either library, when node tries to execute the get request ("var >>> info = yield request.get...") it exits with the following error: >>> >>> SyntaxError: Unexpected identifier >>> >>> And the error highlights the "request" part in "var info = yield >>> request.get..." I'm guessing that the creation of the new function scope >>> in the forEach is somehow causing an issue. But I'm not sure why it's not >>> working. >>> >>> >>> -- -- Job Board: http://jobs.nodejs.org/ Posting guidelines: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines You received this message because you are subscribed to the Google Groups "nodejs" group. To post to this group, send email to nodejs@googlegroups.com To unsubscribe from this group, send email to nodejs+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/nodejs?hl=en?hl=en --- You received this message because you are subscribed to the Google Groups "nodejs" group. To unsubscribe from this group and stop receiving emails from it, send an email to nodejs+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.