How to store arrays of data in object using JavaScript

Question

how to store arrays of data in an Object. I tried to store data using

 var namelist = [], labelDetails   = {};
 addedLabels_list.push(name);
 labedDetails_list[ownerName] = Address;

namelist holds unique names while labelDetails store data in key value pair

Namelist :
0:"ahmad"
1:"jhon"
2: "hamza"
3: "emma"

labelDetails :
ahmad :"lahore"
jhon :"USA"
hamza :"UK"
emma :"USA, Calforina"

But when same owner name has multiple addresses it won't work. Let's say Emma live in USA, California and her second address is Washington Dc

and it replaces emma :"washington dc"

 var namelist = [], labelDetails   = {};
 addedLabels_list.push(name);
 labedDetails_list[ownerName] = Address;

Hey, you can use some array to store multiple address for a same object, something like emma : ["USA, Calforina", "washington, dc"]. — nandanself
– nandanself, Commented Nov 3, 2017 at 11:13
Why don't you just append the address? like this : labedDetails_list[ownerName] += " - "+ Address; — Hamza Abdaoui
– Hamza Abdaoui, Commented Nov 3, 2017 at 11:13
Thats kind of obvious isn't it? The key should be a unique one. — Abhilash Nayak
– Abhilash Nayak, Commented Nov 3, 2017 at 11:15
i want to check same name and address wont repeat @HamzaAbdaoui — Ahmad
– Ahmad, Commented Nov 3, 2017 at 11:16

Peter Seliger · Accepted Answer · 2017-11-03 13:38:40Z

I would try designing a data structure that also stays stable over time, thus choosing a name based (better id based) key-value person-registry that for each person refers a single data item. This data node then is the root for all person related data that yet will come and then has to be taken care of as well ...

var personRegistry = {
  ahmad: {
    addressList: ["Lahore"]
  },
  jhon: {
    addressList: ["USA"]
  },
  hamza: {
    addressList: ["UK"]
  },
  emma: {
    addressList: ["USA, California"]
  }
}


function storeAddress(name, address) {
  var store = personRegistry[name];
  if (!store) {
    store = personRegistry[name] = {};
    store.addressList = [];
  }
  // prevent address duplicates ...
//if (!store.addressList.includes(address)) { // use that if available.
  if (store.addressList.indexOf(address) < 0) {
    store.addressList.push(address);
  }
}


console.log('personRegistry : ', personRegistry);

storeAddress("emma", 'USA, California');
storeAddress("emma", 'USA, Washington DC');
storeAddress("emma", 'USA, Washington DC');

storeAddress("susan", 'Canada, Toronto');
storeAddress("susan", 'Canada, Toronto');

console.log('personRegistry : ', personRegistry);

.as-console-wrapper { max-height: 100%!important; top: 0; }

Hamza Abdaoui · Accepted Answer · 2017-11-03 11:28:56Z

1

For arrays, the key should be unique, so in this case, you can use array to store multiple address for a the same key, this is a start :

function myFunction(){
	var namelist = ["ahmad", "jhon", "hamza", "emma"], 
			labelDetails   = {ahmad :["lahore"], jhon :["USA"], hamza :["UK"], emma :["USA, Calforina"]};
  labelDetails["emma"].push("washington dc");
  console.log(labelDetails);
}

<button onclick="javascript:myFunction()">Click me</button>

answered Nov 3, 2017 at 11:28

Hamza Abdaoui

2,2274 gold badges26 silver badges39 bronze badges

Comments

Harsha Jayamanna · Accepted Answer · 2017-11-03 11:57:56Z

1

You definitely have to make some changes to make your solution work, I would suggest,

labelDetails   = {
    "ahmad" : ["lahore"],
    "jhon" : ["USA"],
    "hamza" : ["UK"],
    "emma" : ["USA, Calforina"]
 };

labelDetails[ownerName].push("washington dc");

answered Nov 3, 2017 at 11:57

Harsha Jayamanna

2,2586 gold badges27 silver badges47 bronze badges

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