JS Dump from VS Code:

function abc(id) {

var countriesSubscription = [

{ Exchange: 'ASX', CountryId: 1, ExchangeRate: 1, CountryName: "Australia", Code: "AU", CurrencyForeign: "AUD", CurrencyLocal: "AUD", IsSubscribed: true, PriceLocal: 15.75, PriceForeign: null, DataType: "ClickToRefresh" },

{ Exchange: 'ASX', CountryId: 2, ExchangeRate: 1.01, CountryName: "Canada", Code: "CAN", CurrencyForeign: "CAD", CurrencyLocal: "AUD", IsSubscribed: false, PriceLocal: null, PriceForeign: null, DataType: "" },

{ Exchange: 'ASX', CountryId: 3, ExchangeRate: 5.78, CountryName: "Hong Kong", Code: "HKG", CurrencyForeign: "HKD", CurrencyLocal: "AUD", IsSubscribed: false, PriceLocal: null, PriceForeign: null, DataType: "" },

{ Exchange: 'CHIX', CountryId: 4, ExchangeRate: 0.74, CountryName: "US", Code: "USA", CurrencyForeign: "USD", CurrencyLocal: "AUD", IsSubscribed: true, PriceLocal: null, PriceForeign: null, DataType: "" },

{ Exchange: 'ASX', CountryId: 5, ExchangeRate: 0.67, CountryName: "France", Code: "FRA", CurrencyForeign: "EUR", CurrencyLocal: "AUD", IsSubscribed: false, PriceLocal: null, PriceForeign: null, DataType: "" },

{ Exchange: 'CHIX', CountryId: 6, ExchangeRate: 1.37, CountryName: "Switzerland", Code: "CHE", CurrencyForeign: "CHF", CurrencyLocal: "AUD", IsSubscribed: true, PriceLocal: null, PriceForeign: null, DataType: "" },

{ Exchange: 'ASX', CountryId: 7, ExchangeRate: 0.73, CountryName: "Belgium", Code: "BEL", CurrencyForeign: "EUR", CurrencyLocal: "AUD", IsSubscribed: false, PriceLocal: null, PriceForeign: null, DataType: "" },

];

countriesSubscription.forEach(function (element) {

if (element.CountryId === id) {

element.IsSubscribed = true;

return;

}

});

for (var index = 0; index < countriesSubscription.length; index++) {

var element = countriesSubscription[index];

console.log(element.CountryName + ' ' + element.IsSubscribed);

}

// Use map function

var result = countriesSubscription.map(function (element) {

return element.CurrencyLocal + " " + element.PriceLocal;

});

result.forEach(function (element) {

console.log(element);

}, this);

// reduce array of objects to dictionary

var countryDictionary = countriesSubscription.reduce(function (o, v) {

o[v.CountryId] = v;

return o;

}, {});

console.log(countryDictionary[1]);

console.log(countryDictionary[1].CountryName);

console.log(countryDictionary[2]);

console.log(countryDictionary[2].CountryName);

// Find index of element

Array.prototype.indexOfObject = function countriesSubscription(property, value) {

for (var i = 0, len = this.length; i < len; i++) {

if (this[i][property] === value) return i;

}

return -1;

}

var result = countriesSubscription.indexOfObject("CountryName", "Canada");

console.log(result);

result = countriesSubscription.map(function (e) { return e.CountryName; }).indexOf('Canada');

console.log(result);

console.log(countriesSubscription[result].CountryName);

// **** Array to group by Exchange ****

var groupByCurrency = countriesSubscription.reduce(function(all, item, index){

all[item.Exchange].push(item);

return all;

}, {CHIX:[], ASX:[]});

groupByCurrency.ASX.forEach(function(item){

console.log(item);

})

groupByCurrency.CHIX.forEach(function(item){

console.log(item);

})

// Custom function that loops and finds

countrySearch = function (array, callback) {

for (var key in countriesSubscription) {

if (callback(countriesSubscription[key])) {

return countriesSubscription[key];

}

}

}

var countryById = this.countrySearch(countriesSubscription, function(key){

return key.CountryId === 1;

})

console.log(countryById);

var countryByName = this.countrySearch(countriesSubscription, function(key){

return key.CountryName === "Australia";

})

console.log(countryByName);

var CountryBySubscribtion = this.countrySearch(countriesSubscription, s => s.IsSubscribed === false )

console.log(CountryBySubscribtion.CountryName);

}

abc(3);