How to reference an array item in an object array? Js

Question

sorry if this question seems a little stupid but I have the following code:

var sides = {
    'red': [0,0,0,0,0,0,0,0,0],
    'ora': [0,0,0,0,2,0,0,3,0],
    'yel': [0,0,0,0,0,0,0,0,0],
    'gre': [0,0,0,1,0,1,0,0,0],
    'blu': [0,0,0,0,0,0,0,0,0],
    'whi': [0,0,0,0,0,0,0,0,0],
}

As an example how can I reference array item [0] in sides['red'] ?

I have tried:

sides['red'][0];
sides['red'[0]];

This is probably very wrong, can anyone suggest how I would declare it otherwise?

The first one should work.

Scimonster
– Scimonster

2014-09-19 11:25:58 +00:00
Commented Sep 19, 2014 at 11:25 — Scimonster
– Scimonster, Commented Sep 19, 2014 at 11:25
sides['red'][0]; should be fine ...

Alex K.
– Alex K.

2014-09-19 11:26:08 +00:00
Commented Sep 19, 2014 at 11:26 — Alex K.
– Alex K., Commented Sep 19, 2014 at 11:26

James Donnelly · Accepted Answer · 2014-09-19 11:25:53Z

5

Your first trial works as intended:

sides['red'][0];

This returns 0 as the first value (the 0 index) in your slides['red'] array is equal to 0:

'red': [0,0,0,0,0,0,0,0,0], ...
        ^

You could also use:

slides.red[0];

answered Sep 19, 2014 at 11:25

James Donnelly

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ChiMo Over a year ago

Thanks for the comment, it must be my logic that isn't working and not the reference :S

Manwal · Accepted Answer · 2014-09-19 11:26:22Z

1

Simple you can use . operator:

sides.red[0]

DEMO

var sides = {
    'red': [1,0,0,0,0,0,0,0,0],
    'ora': [0,0,0,0,2,0,0,3,0],
    'yel': [0,0,0,0,0,0,0,0,0],
    'gre': [0,0,0,1,0,1,0,0,0],
    'blu': [0,0,0,0,0,0,0,0,0],
    'whi': [0,0,0,0,0,0,0,0,0],
}

alert(sides['red'][0]);
alert(sides.red[0]);

answered Sep 19, 2014 at 11:26

Manwal

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