Node.js: for each … in not working

Question

I wanted to use for each ... in with Node.js (v0.4.11).

I use it like this:

var conf = {    index: {       path: {          first: "index.html",          pattern: "index/{num}.html"       },       template: "index.tpl",       limit: 8    },    feed: {       path: "feed.xml",       template: "atom.tpl",       limit: 8    } }  for each (var index in conf) {   console.log(index.path); } 

I get the following error:

        for each (var index in conf) {      ^^^^  node.js:134         throw e; // process.nextTick error, or 'error' event on first tick         ^ SyntaxError: Unexpected identifier     at Module._compile (module.js:397:25)     at Object..js (module.js:408:10)     at Module.load (module.js:334:31)     at Function._load (module.js:293:12)     at require (module.js:346:19)     at Object.<anonymous> (/home/paul/dev/indexing/lib/Index.js:3:13)     at Module._compile (module.js:402:26)     at Object..js (module.js:408:10)     at Module.load (module.js:334:31)     at Function._load (module.js:293:12) 

Where is the mistake? for each ... in is supported since Javascript 1.6.

See MDN for information about the usage of for each ... in.

Answer 1

Unfortunately node does not support for each ... in, even though it is specified in JavaScript 1.6. Chrome uses the same JavaScript engine and is reported as having a similar shortcoming.

You'll have to settle for array.forEach(function(item) { /* etc etc */ }).

EDIT: From Google's official V8 website:

V8 implements ECMAScript as specified in ECMA-262.

On the same MDN website where it says that for each ...in is in JavaScript 1.6, it says that it is not in any ECMA version - hence, presumably, its absence from Node.

Answer 2

for (var i in conf) {   val = conf[i];   console.log(val.path); }