JS Practice — Built-in Objects

Array.prototype.find() — find object by id

📖 Usage Example

const users = [{id:1, name:'Alice'}, {id:2, name:'Bob'}]
users.find(u => u.id === 2)  // → {id:2, name:'Bob'}

Use find() to locate the first object in an array that matches a property condition.

Array.prototype.find() — objects

find() is commonly used to look up an object in an array by a unique property such as an id.

Challenge: Implement findById(items, id) that returns the first item whose id matches.

findById([{id:1,name:'A'},{id:2,name:'B'}], 2) // → {id:2, name:'B'}
findById([{id:1,name:'A'}], 99)                // → undefined

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