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📦 Exercice 10 : Grouper les objets par une propriété
🎯 Objectif : Travailler sur des structures de données plus complexes.
function groupBy(items, key) {
// à implémenter
}🧪 Exemple :
const items = [
{ type: "fruit", name: "apple" },
{ type: "vegetable", name: "carrot" },
{ type: "fruit", name: "banana" },
];
groupBy(items, "type");
// {
// fruit: [
// { type: "fruit", name: "apple" },
// { type: "fruit", name: "banana" }
// ],
// vegetable: [
// { type: "vegetable", name: "carrot" }
// ]
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