const movies = [
{ name: "Escape from Pretoria", year: 2020 },
{ name: "Good Will Hunting", year: 1997 },
{ name: "The Matrix", year: 1999 },
{ name: "Tarzan", year: 1999 },
{ name: "Titanic", year: 1997 },
{ name: "The Imitation Game", year: 2014 },
];
to object like this
const x = {
1997: ["Good will Hunting", "Titanic"],
1999: ["The Matrix", "Tarazan"],
2014: ["The Imitation Game"],
2020: ["Escape from Pretoria"],
};
Using reduce() or another way .. thank you!
const movies = [
{ name: "Escape from Pretoria", year: 2020 },
{ name: "Good Will Hunting", year: 1997 },
{ name: "The Matrix", year: 1999 },
{ name: "Tarzan", year: 1999 },
{ name: "Titanic", year: 1997 },
{ name: "The Imitation Game", year: 2014 },
];
let obj={};
movies.forEach(({year, name})=>{
if(obj[year]){
obj[year].push(name)
} else {
obj[year] = [name]
}
})
console.log(obj);
Here's a solution using reduce
const movies = [
{ name: "Escape from Pretoria", year: 2020 },
{ name: "Good Will Hunting", year: 1997 },
{ name: "The Matrix", year: 1999 },
{ name: "Tarzan", year: 1999 },
{ name: "Titanic", year: 1997 },
{ name: "The Imitation Game", year: 2014 },
];
const result = movies.reduce((acc, curr) => {
if (acc[curr.year]) acc[curr.year].push(curr.name)
else acc[curr.year] = [curr.name]
return acc
}, {})
console.log(result)Both solutions is great but in this case forEach method is faster.