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Objects: JavaScript: Uncharted

Courses JavaScriptObjects

Objects

Group named values into object shapes, access changing properties, model nested data, and move objects through JSON.

JavaScript
Unit 8 of 20
20 lessons
178 min
420 XP

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Lessons

20 total

1A Card for EverythingRecognize the related named fields that belong together on a contact card.InteractiveConcept7 min20 XPOpen
2Your First ObjectCreate an object literal and read one of its properties with dot access.CodeConcept8 min20 XPOpen
3Brackets When DynamicUse a variable as an object property key with bracket access.CodeConcept8 min20 XPOpen
4Grow and PruneAdd, update, and delete object properties while editing a profile.CodeConcept9 min20 XPOpen
5Objects with VerbsDefine and call an object method that reads another property through this.CodeConcept9 min20 XPOpen
6Dot or Bracket?Match object lookup situations to dot or bracket access.InteractiveConcept7 min20 XPOpen
7Cards Inside CardsCreate a nested order object and read fields from its customer object.CodeConcept8 min20 XPOpen
8The Workhorse ShapeLoop over an array of objects and print a field from every item.CodeConcept9 min20 XPOpen
9Total the CartAccumulate a checkout total by reading numeric fields from objects in an array.CodeConcept9 min20 XPOpen
10Manifest RunDrive a courier route from a manifest object containing a stops array.Code worldConcept11 min20 XPOpen
11Keys and ValuesUse Object.keys and Object.values to report the two sides of an object.CodeConcept8 min20 XPOpen
12Undefined ChainsPredict the difference between a missing leaf property and a missing intermediate object.InteractiveConcept7 min20 XPOpen
13The Question-Mark DotUse optional chaining to make a nested property lookup safe.CodeConcept8 min20 XPOpen
14Save and LoadRound-trip a game-progress object through JSON text.CodeConcept9 min20 XPOpen
15Shape from a StoryArrange object-building steps to model a prose description with nesting.InteractiveConcept8 min20 XPOpen
16Mini CatalogFind a book in an object catalog by a dynamic key.CodePractice11 min20 XPOpen
17Expense TallyUse an object as a tally map while looping over expense entries.CodePractice11 min20 XPOpen
18Two Names, One ThingContrast a shared object reference with an independent spread copy.CodeConcept10 min20 XPOpen
19Array or Object?Choose and justify arrays, objects, or arrays of objects for three datasets.InteractiveConcept9 min20 XPOpen
20Objects Mastery CheckNormalize, inspect, serialize, and restore a nested profile without mutating its input.CodeMastery check12 min40 XPOpen

Arrays Strings in Depth