JS Practice — Built-in Objects

Array.prototype.findLast() — last active user

📖 Usage Example

const logs = [{type:'err'}, {type:'info'}, {type:'err'}]
logs.findLast(l => l.type === 'err')  // → {type:'err'} (last one)

Use findLast() to locate the most recent object in an array matching a property condition.

Array.prototype.findLast() — objects

Like find(), findLast() works on any element type, including objects. It returns the last object in the array that satisfies the predicate.

Challenge: Implement findLastActive(users) that returns the last user with active: true.

findLastActive([{name:'A',active:true},{name:'B',active:false},{name:'C',active:true}])
// → {name:'C', active:true}

💡 Hints (2)

• `findLast` traverses from the end, so it naturally finds the last matching object.
• The predicate is identical to what you would write for `find` — just the traversal direction differs.