Adding New Data to JS multidimensional Object

Question

I am using an object in my react-redux app in reducer file.The object is like as below

tradings: {
        'buy': {
            data: []
        },
        'sell': {
            data: []
        },
        'total': {
            data: []
        }
    },

So,whenever i get a new dataset i want to push it into data array of any object ,Suppose i got buy and data:[time:234234, amount: 0.0123 ].So my new tradings object will look like this:

tradings: {
        'buy': {
            data: [[time:234234, amount: 0.0123 ], ....]
        },
        'sell': {
            data: []
        },
        'total': {
            data: []
        }
    },

How can i concat arrays into this array in object?

tradings.buy.data.push(yourData); or tradings[key].data.push(yourData); where key is a string var — GrafiCode
– GrafiCode, Commented Sep 5, 2019 at 16:30
[time:234234, amount: 0.0123 ] is not a valid array in JS. It should be an object if you want key-value pairs like {time:234234, amount: 0.0123 }. Why not using Array.push() btw? Maybe with switch/case to act based on buy/sell type? — Harun Yilmaz
– Harun Yilmaz, Commented Sep 5, 2019 at 16:31
push can't be used here unless you make a copy before, as the question is related to redux you need to keep care of mutablity — Code Maniac
– Code Maniac, Commented Sep 5, 2019 at 16:33
@CodeManiac you're right. Maybe OP can use spread operator to copy the object since it holds primitive values. tradings.buy.data = [...tradings.buy.data, newData] may help — Harun Yilmaz
– Harun Yilmaz, Commented Sep 5, 2019 at 16:41

Mohammed Mortaga · Accepted Answer · 2019-09-05 16:38:17Z

1

Assuming you have the following object:

tradings = {
        'buy': {
            data: []
        },
        'sell': {
            data: []
        },
        'total': {
            data: []
        }
    }

And your received data was:

data = {buy: {time:234234, amount: 0.0123 }}

You'll first need to grab the key in your data object and then push it to the desired array in your tradings object like the following:

key = Object.keys(data)[0];
tradings[key].data.push(data[key]);

fiddle: https://jsfiddle.net/9hsvd5pk/

edited Sep 5, 2019 at 16:38

answered Sep 5, 2019 at 16:35

Mohammed Mortaga

1392 silver badges8 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Tick Twitch Over a year ago

SO, from the next time?

Mohammed Mortaga Over a year ago

This is a generalized solution that should work for all cases where the key does actually exist. Just make sure your data is structured correctly and this should always work. Check my fiddle.

Max Alexander Hanna · Accepted Answer · 2019-09-05 16:36:27Z

0

tradings["buy"].data.push( YOUR ARRAY HERE )

to add arrays into that array, or create the array somewhere and add it via javascript :

tradings["buy"].data =  YOUR ARRAY HERE

answered Sep 5, 2019 at 16:36

Max Alexander Hanna

3,9031 gold badge32 silver badges41 bronze badges

Collectives™ on Stack Overflow

Adding New Data to JS multidimensional Object

2 Answers 2

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related