JS Built-ins
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ArrayArray.prototype.filterintermediate

Array.prototype.filter() — filter objects by property

📖 Usage Example
const items = [{done: true}, {done: false}, {done: true}]
items.filter(i => i.done)  // → [{done:true}, {done:true}]

Use filter() to extract objects from an array based on a boolean property.

Array.prototype.filter() — objects

filter() is very commonly used with arrays of objects to keep only those satisfying some property condition.

Challenge: Implement filterActive(users) that returns only users where active is true.

filterActive([{name:'A', active:true}, {name:'B', active:false}])
// → [{name:'A', active:true}]
💡 Hints (2)
  • • `u.active` is already a boolean, so `u => u.active` is sufficient.
  • • `filter` preserves the original object references — it does not deep-copy them.