How to fetch the value in object array in javascript

Question

I would like to know how to get/fetch the object in nested array using javascript.

var value = "SGD"
var obj=[{
  country: singapore,
  ccy: ["EUR","SGD"]
  amount: "1000"
},{
  country: thailand,
  ccy: ["THB"]
  amount: "1000"
}]

function getData(){
 return obj.filter((e)=>{
    return e.ccy == value; // fetch array object if it matches the value
  }
}

var result = getData();
console.log(result);

you'll want a combination of map/filter ... or maybe find or something — Jaromanda X
– Jaromanda X, Commented May 15, 2019 at 8:21
@JaromandaX: I have no idea what the OP is asking, and neither do you. Until they post their code and example output all we can do is to make more or less accurate guesses. — georg
– georg, Commented May 15, 2019 at 8:24
I know exactly what they are asking @georg - the clue is in the question ... fetch array object if it matches the value — Jaromanda X
– Jaromanda X, Commented May 15, 2019 at 8:25

Yosvel Quintero · Accepted Answer · 2019-05-15 08:50:35Z

1

To get the array of objects that includes the selected currency in the variable value you can use Array.prototype.filter() combined with Array.prototype.includes():

const value = 'SGD';
const obj = [{country: 'singapore',ccy: ['EUR', 'SGD'],amount: '1000'}, {country: 'thailand',ccy: ['THB'],amount: '1000'}];
const getData = (arr, value) => arr.filter(o => o.ccy.includes(value));

const result = getData(obj, value);
console.log(result);

Note that instead of a function getData using variables out of function scope it is better pass the parameters you need in the function getData(obj, value)

edited May 15, 2019 at 8:50

answered May 15, 2019 at 8:26

Yosvel Quintero

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Comments

T.J. Crowder · Accepted Answer · 2019-05-15 08:23:52Z

0

It's hard to tell from your question, but if you want the first matching entry in the array, you're looking for the find method, using includes on ccy in the search:

function getData(){
    return obj.find(e => e.ccy.includes(value));
}

Live Example:

var value = "SGD";
var obj= [{
  country: "singapore",
  ccy: ["EUR","SGD"],
  amount: "1000"
},{
  country: "thailand",
  ccy: ["THB"],
  amount: "1000"
}];

function getData() {
  return obj.find(e => e.ccy.includes(value));
}

var result = getData();
console.log(result);

answered May 15, 2019 at 8:23

T.J. Crowder

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Comments

Maheer Ali · Accepted Answer · 2019-05-15 08:24:56Z

0

e.ccy is an array. Comparing it with any other variable will never return true unless both have same reference. To check if the element is present in array using Array.prototype.includes()

var value = "SGD";
var obj=[{
  country: 'singapore',
  ccy: ["EUR","SGD"],
  amount: "1000"
},{
  country: 'thailand',
  ccy: ["THB"],
  amount: "1000"
}]

function getData(){
 return obj.filter((e)=>{
    return e.ccy.includes(value)
  })
}

var result = getData();
console.log(result);

answered May 15, 2019 at 8:24

Maheer Ali

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Comments

Anil Kumar Moharana · Accepted Answer · 2019-05-15 09:55:41Z

0

var obj=[{
  country: 'singapore',
  ccy: ["EUR","SGD"],
  amount: "1000"
},{
  country: 'thailand',
  ccy: ["THB"],
  amount: "1000"
}]

function getData(val) {
   var result = obj.find(function(o) {
   return o.ccy.indexOf(val) > -1;
   });
return result;
}

console.log(getData('SGD'));

edited May 15, 2019 at 9:55

answered May 15, 2019 at 9:46

Anil Kumar Moharana

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