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Last active Jan 10, 2020
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type Book = {
title: string;
genre: string;
publicationYear: number;
type Car = {
modelName: string;
type: string;
price: number;
const listOfBooks: Book[] = [
{title: 'Dragon Of The Titans', genre: 'fantasy', publicationYear: 1992},
{title: 'Queen Of Spring', genre: 'drama', publicationYear: 2005},
{title: 'Wolves Of The King', genre: 'fantasy', publicationYear: 1988}
const listOfCars: Car[] = [
{modelName: 'Yellow Car', type: 'coupe', price: 20000},
{modelName: 'Blue Car', type: 'SUV', price: 45000},
{modelName: 'Green Car', type: 'coupe', price: 18000}
const filterArrayByValue = <T, P extends keyof T>(
items: T[],
propertyName: P,
valueToFilter: T[P] //Partial<T>
): T[] => {
return items.filter(item =>item[propertyName] === valueToFilter);
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