How to Loop through JSON Objects having Objects and Arrays Inside

Question

let mything = {
  "holders": [{
    "address": "0xbe0eb53f46cd790cd13851d5eff43d12404d33e8",
    "balance": 8.623839536582375e24,
    "share": 52.02
  }, {
    "address": "0xf977814e90da44bfa03b6295a0616a897441acec",
    "balance": 4.5e24,
    "share": 27.14
  }]
};

let m = Object.entries(mything);
console.log(m);

The above is a json data, stored in a file, now what I want to do is to loop over this whole file which has 2000 of such entries, get just the address part of each entry and append it in a url, so how would I do the looping part?? Any code Snippet for javaScript would be lovely. Cudos.

Please add the code you have tried also and your specific challenge with it — Mark Schultheiss
– Mark Schultheiss, Commented Dec 9, 2021 at 13:00
Thank You Mark, for reaching out, my challenge is to get the address value and further use it, and im trying something like Object.entries() method and after that I dont really know what to do. — Newbie Developer
– Newbie Developer, Commented Dec 9, 2021 at 13:08

Brewal · Accepted Answer · 2021-12-09 13:12:05Z

2

You can use the map function to get a one liner :

const data = {"holders": [{
  "address": "0xbe0eb53f46cd790cd13851d5eff43d12404d33e8",
  "balance": 8.623839536582375e24,
  "share": 52.02
},{
  "address": "0xf977814e90da44bfa03b6295a0616a897441acec",
  "balance": 4.5e24,
  "share": 27.14
}]};

const url = "https://my.url/";
const urls = data.holders.map(holder => `${url}${holder.address}`);

console.log(urls);

answered Dec 9, 2021 at 13:12

Brewal

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Comments

Deepak · Accepted Answer · 2021-12-09 13:05:21Z

0

Since holders object is an array, you can loop over it like below, and make use of the address like constructing the URL as per your logic inside the loop. Here's the example of storing the addresses in an array:

var original = {
  "holders": [{
    "address": "0xbe0eb53f46cd790cd13851d5eff43d12404d33e8",
    "balance": 8.623839536582375e24,
    "share": 52.02
  }, {
    "address": "0xf977814e90da44bfa03b6295a0616a897441acec",
    "balance": 4.5e24,
    "share": 27.14
  }]
};

var addresses = [];
for (let holder of original.holders) {
  addresses.push(holder.address);
}
console.log(addresses)

answered Dec 9, 2021 at 13:05

Deepak

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Comments

David · Accepted Answer · 2021-12-09 13:06:47Z

0

const data = {"holders": [{
  "address": "0xbe0eb53f46cd790cd13851d5eff43d12404d33e8",
  "balance": 8.623839536582375e24,
  "share": 52.02
},{
  "address": "0xf977814e90da44bfa03b6295a0616a897441acec",
  "balance": 4.5e24,
  "share": 27.14
}]};

for(const obj of Object.values(data)) {
    for(const arr of obj) {
        // Your code
    }
}

answered Dec 9, 2021 at 13:06

David

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Comments

Lakshaya U. · Accepted Answer · 2021-12-09 13:10:58Z

0

Use Array.prototype.map.

const holders = [{
    "address": "0xbe0eb53f46cd790cd13851d5eff43d12404d33e8",
    "balance": 8.623839536582375e24,
    "share": 52.02
}, {
    "address": "0xf977814e90da44bfa03b6295a0616a897441acec",
    "balance": 4.5e24,
    "share": 27.14
}];

const addresses = holders.map((holder) => holder.address);

console.log(addresses);

answered Dec 9, 2021 at 13:10

Lakshaya U.

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