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function distinctDemo1(orders) {
const distinctQuantityOrders = orders
.map(order => order.quantity)
.filter((quantity, index, self) => self.indexOf(quantity) === index);
distinctQuantityOrders.forEach(quantity =>
WriteLine(`Distinct Quantity: ${quantity}`)
);
}
/**
* An alternate method of implementing Distinct() LINQ method using new "Set" introduced in ES6 and the spread operator
*/
function distinctDemo2(orders) {
const distinctQuantityOrders = [
...new Set(orders.map(order => order.quantity))
];
distinctQuantityOrders.forEach(quantity =>
WriteLine(`Distinct Quantity: ${quantity}`)
);
}
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