node.js not working Object.keys

Question

var list = {"you": 100, "me": 75, "foo": 116, "bar": 15};
keysSorted = Object.keys(list).sort(function(a,b){return list[a]-list[b]})
alert(keysSorted);     // bar,me,you,foo

from Sorting JavaScript Object by property value

I'm doing Object sorting. Above source working in Javascript. But not working in Node.js. I have an error like this.

keysSorted = Object.keys(list).sort(function(a,b){return list[a]-list[b]})
                    ^
TypeError: Object.keys is not a function

I don't know why. Please help me.

Are you redeclaring `Object` somewhere? like `var Object = 'something else';`? Not sure how Node would react to that but seeing `TypeError: Object.keys is not a function` leaves me just that option... — Sergio, Nov 13 '16 at 08:25
Tested in node `6.2.2` and you can actually do `var Object = 'something else';` and erase the Object native value.... can that be your problem? Check your variables... — Sergio, Nov 13 '16 at 08:27
OMG!!!!!!! I found my mistake. I declared `var Object = 'requrie file';`. Thank u so much guys. You're genius. — firepunch, Nov 13 '16 at 13:51

score 3 · Accepted Answer · edited Nov 13 '16 at 12:13

3

Most likely, you are using an out-dated Node.js version, v0.10 or v0.12. To check the version try running node -v.

This old version doesn't support Object.keys. You can check supported features for every Node.js versions here.

My advice is to update to Node.js version to 6.9.1. This version is current LTS (Long-term support).

edited Nov 13 '16 at 12:13

answered Nov 13 '16 at 10:45

galkin

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Object.keys() on objects works just fine with node v0.10. – Sergio Nov 13 '16 at 11:11
As you say, I update node.js to `6.9.1`. But still not workingTT. appearing same error . – firepunch Nov 13 '16 at 13:48
1

I solve it. I declared `var Object;` Anyway thank you answering! :) – firepunch Nov 13 '16 at 13:53
This is incorrect. `Object.fit()` [works fine on Node 0.10](https://runkit.com/bfred-it/object-keys-on-node-0-10) – fregante Jul 03 '17 at 07:00

node.js not working Object.keys

1 Answers1