object index problem

Posted on Wed 23rd, April 2014

• #1

Alex

Hi all,

I have encountered a strange problem regarding indices. I have a small snippet of example code that shows this problem:

var a = {};
var c = {};

var b = "0";

a[b] = "hello world";
c["0"] = "hello moon";

console.log(a[b],a[0],a["0"]);
// output: hello world undefined undefined

console.log(c[b],c[0],c["0"]);
// output: undefined hello moon hello moon

function foo(id) {
 console.log(id,a[id], c[id]);
}

foo(b);
// output: 0 hello world undefined

foo("0");
// output: 0 hello world undefined

I would expect that a[b] and a["0"] would give the same result?

Thanks for all the help so far!

• #2

Gordon

Thanks! Yes, that looks like a big problem. I'll look into it - and thanks for coming up with the code that demonstrates it so nicely.

Array indices should that can be integers should be converted to ints. It looks like when you put a string in a variable, for some reason it doesn't get converted.
• #3

Gordon

Ok, Fixed!

It'll be in http://www.espruino.com/binaries/git/commits/3b5c45f55cef03c7e9cf3ba87bd57ec9a7c536b1 in an hour or so - or 1v62 when it's released.
• #4

Alex

Great! Thanks!

Post a reply
- Bold
- Italics
- Link
- Image
- List
- Quote
- code
- Preview
Formatting Help

Don't worry about formatting, just type in the text and we'll take care of making sense of it. We will auto-convert links, and if you put asterisks around words we will make them bold.

Tips:

Create headers by underlining text with ==== or ----

To *italicise* text put one asterisk each side of the word

To **bold** text put two asterisks each side of the word

Embed images by entering:
![](https://www.google.co.uk/images/srpr/logo4w.png)
That's the hard one: exclamation, square brackets and then the URL to the image in brackets.

* Create lists by starting lines with asterisks

1. Create numbered lists by starting lines with a number and a dot

> Quote text by starting lines with >

Mention another user by @username

For syntax highlighting, surround the code block with three backticks:

```
Your code goes here
```
Just like Github, a blank line must precede a code block.

If you upload more than 5 files we will display all attachments as thumbnails.

For a full reference visit the Markdown syntax.

object index problem

About

object index problem

Actions

object index problem

Formatting Help

About

object index problem

Actions

Espruino