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Reflect

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Exercises (140)

○Reflect.get() — basic property read
Beginner
○Reflect.get() — array index
Beginner
○Reflect.get() — missing key returns undefined
Beginner
○Reflect.get — typeof
Beginner
○Reflect.get() — string value
Beginner
○Reflect.set() — basic property write
Beginner
○Reflect.set() — returns true on success
Beginner
○Reflect.set() — set array element
Beginner
○Reflect.set — typeof
Beginner
○Reflect.set() — update existing property
Beginner
○Reflect.has() — existing key returns true
Beginner
○Reflect.has() — missing key returns false
Beginner
○Reflect.has() — array index as key
Beginner
○Reflect.has — typeof
Beginner
○Reflect.has() — check second key
Beginner
○Reflect.deleteProperty() — delete a property
Beginner
○Reflect.deleteProperty() — returns true
Beginner
○Reflect.deleteProperty() — nonexistent key
Beginner
○Reflect.deleteProperty — typeof
Beginner
○Reflect.deleteProperty() — key no longer in object
Beginner
○Reflect.ownKeys() - list all own keys
Beginner
○Reflect.ownKeys() - array with element
Beginner
○Reflect.ownKeys - typeof
Beginner
○Reflect.ownKeys() - empty object
Beginner
○Reflect.ownKeys() - three keys
Beginner
○Reflect.apply() - Math.max
Beginner
○Reflect.apply() - String.prototype.includes
Intermediate
○Reflect.apply() - Array.prototype.push
Intermediate
○Reflect.apply - typeof
Beginner
○Reflect.apply() - arrow function add
Beginner
○Reflect.construct() - Array with length
Beginner
○Reflect.construct() - instanceof Object
Beginner
○Reflect.construct() - Date instanceof
Beginner
○Reflect.construct - typeof
Beginner
○Reflect.construct() - class Point
Intermediate
○Reflect.get() — basic property read
Beginner
○Reflect.get() — array index
Beginner
○Reflect.get() — missing key returns undefined
Beginner
○Reflect.get — typeof
Beginner
○Reflect.get() — string value
Beginner
○Reflect.set() — basic property write
Beginner
○Reflect.set() — returns true on success
Beginner
○Reflect.set() — set array element
Beginner
○Reflect.set — typeof
Beginner
○Reflect.set() — update existing property
Beginner
○Reflect.has() — existing key returns true
Beginner
○Reflect.has() — missing key returns false
Beginner
○Reflect.has() — array index as key
Beginner
○Reflect.has — typeof
Beginner
○Reflect.has() — check second key
Beginner
○Reflect.deleteProperty() — delete a property
Beginner
○Reflect.deleteProperty() — returns true
Beginner
○Reflect.deleteProperty() — nonexistent key
Beginner
○Reflect.deleteProperty — typeof
Beginner
○Reflect.deleteProperty() — key no longer in object
Beginner
○Reflect.ownKeys() - list all own keys
Beginner
○Reflect.ownKeys() - array with element
Beginner
○Reflect.ownKeys - typeof
Beginner
○Reflect.ownKeys() - empty object
Beginner
○Reflect.ownKeys() - three keys
Beginner
○Reflect.apply() - Math.max
Beginner
○Reflect.apply() - String.prototype.includes
Intermediate
○Reflect.apply() - Array.prototype.push
Intermediate
○Reflect.apply - typeof
Beginner
○Reflect.apply() - arrow function add
Beginner
○Reflect.construct() - Array with length
Beginner
○Reflect.construct() - instanceof Object
Beginner
○Reflect.construct() - Date instanceof
Beginner
○Reflect.construct - typeof
Beginner
○Reflect.construct() - class Point
Intermediate
○Reflect.get() — basic property read
Beginner
○Reflect.get() — array index
Beginner
○Reflect.get() — missing key returns undefined
Beginner
○Reflect.get — typeof
Beginner
○Reflect.get() — string value
Beginner
○Reflect.set() — basic property write
Beginner
○Reflect.set() — returns true on success
Beginner
○Reflect.set() — set array element
Beginner
○Reflect.set — typeof
Beginner
○Reflect.set() — update existing property
Beginner
○Reflect.has() — existing key returns true
Beginner
○Reflect.has() — missing key returns false
Beginner
○Reflect.has() — array index as key
Beginner
○Reflect.has — typeof
Beginner
○Reflect.has() — check second key
Beginner
○Reflect.deleteProperty() — delete a property
Beginner
○Reflect.deleteProperty() — returns true
Beginner
○Reflect.deleteProperty() — nonexistent key
Beginner
○Reflect.deleteProperty — typeof
Beginner
○Reflect.deleteProperty() — key no longer in object
Beginner
○Reflect.ownKeys() - list all own keys
Beginner
○Reflect.ownKeys() - array with element
Beginner
○Reflect.ownKeys - typeof
Beginner
○Reflect.ownKeys() - empty object
Beginner
○Reflect.ownKeys() - three keys
Beginner
○Reflect.apply() - Math.max
Beginner
○Reflect.apply() - String.prototype.includes
Intermediate
○Reflect.apply() - Array.prototype.push
Intermediate
○Reflect.apply - typeof
Beginner
○Reflect.apply() - arrow function add
Beginner
○Reflect.construct() - Array with length
Beginner
○Reflect.construct() - instanceof Object
Beginner
○Reflect.construct() - Date instanceof
Beginner
○Reflect.construct - typeof
Beginner
○Reflect.construct() - class Point
Intermediate
○Reflect.get() — basic property read
Beginner
○Reflect.get() — array index
Beginner
○Reflect.get() — missing key returns undefined
Beginner
○Reflect.get — typeof
Beginner
○Reflect.get() — string value
Beginner
○Reflect.set() — basic property write
Beginner
○Reflect.set() — returns true on success
Beginner
○Reflect.set() — set array element
Beginner
○Reflect.set — typeof
Beginner
○Reflect.set() — update existing property
Beginner
○Reflect.has() — existing key returns true
Beginner
○Reflect.has() — missing key returns false
Beginner
○Reflect.has() — array index as key
Beginner
○Reflect.has — typeof
Beginner
○Reflect.has() — check second key
Beginner
○Reflect.deleteProperty() — delete a property
Beginner
○Reflect.deleteProperty() — returns true
Beginner
○Reflect.deleteProperty() — nonexistent key
Beginner
○Reflect.deleteProperty — typeof
Beginner
○Reflect.deleteProperty() — key no longer in object
Beginner
○Reflect.ownKeys() - list all own keys
Beginner
○Reflect.ownKeys() - array with element
Beginner
○Reflect.ownKeys - typeof
Beginner
○Reflect.ownKeys() - empty object
Beginner
○Reflect.ownKeys() - three keys
Beginner
○Reflect.apply() - Math.max
Beginner
○Reflect.apply() - String.prototype.includes
Intermediate
○Reflect.apply() - Array.prototype.push
Intermediate
○Reflect.apply - typeof
Beginner
○Reflect.apply() - arrow function add
Beginner
○Reflect.construct() - Array with length
Beginner
○Reflect.construct() - instanceof Object
Beginner
○Reflect.construct() - Date instanceof
Beginner
○Reflect.construct - typeof
Beginner
○Reflect.construct() - class Point
Intermediate