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Objects with Behavior: JavaScript: Uncharted

Courses JavaScriptObjects with Behavior

Objects with Behavior

Combine receiver state with classes, shared prototype methods, and inheritance to model capable objects.

JavaScript
Unit 14 of 20
20 lessons
181 min
420 XP

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Lessons

20 total

1Nouns with AbilitiesDistinguish what an object knows from what the same object can do.InteractiveConcept6 min20 XPOpen
2this Means MeUse this inside a method to read state from the object receiving the call.CodeConcept8 min20 XPOpen
3Whose this Is It?Predict a method receiver by looking at the object used at each call site.InteractiveConcept8 min20 XPOpen
4The Detached MethodRepair a detached method by calling it through the object that should be its receiver.CodeConcept9 min20 XPOpen
5Factories Before ClassesBuild independent timer objects with a factory function.CodeConcept9 min20 XPOpen
6class, at LastDefine a class with a constructor and one method.CodeConcept9 min20 XPOpen
7Many from OneCreate several class instances whose state changes independently.CodeConcept9 min20 XPOpen
8Constructor GuardsReject invalid constructor inputs before an unusable instance is created.CodeConcept9 min20 XPOpen
9Methods That CooperateCall one method from a sibling method through this.CodeConcept9 min20 XPOpen
10Assemble the ClassOrder the parts that define, construct, instantiate, and use a class.InteractiveConcept7 min20 XPOpen
11The Shared ToolbeltProve that class instances share one prototype method function.CodeConcept9 min20 XPOpen
12Lookup Up the ChainPredict whether an own property or prototype property supplies a value.InteractiveConcept8 min20 XPOpen
13extends the FamilyExtend a base vehicle class with electric-van behavior.CodeConcept10 min20 XPOpen
14super Calls HomeUse super in a subclass constructor and method to reuse base behavior.CodeConcept10 min20 XPOpen
15Override PolitelySpecialize an inherited method while preserving its input and return contract.CodeConcept10 min20 XPOpen
16Class or Plain Object?Choose between one small data object and a class for many stateful actors.InteractiveConcept7 min20 XPOpen
17Vending Machine BuildBuild a vending machine class with credit, selection, dispensing, and refund behavior.CodePractice12 min20 XPOpen
18Courier ClassModel a courier whose position changes through move calls.CodePractice11 min20 XPOpen
19Teach this to a FriendExplain the normal-method call-site rule for this in your own words.InteractiveConcept9 min20 XPOpen
20Objects with Behavior Mastery CheckCombine receiver state, classes, shared prototype methods, and inheritance in one electric-van model.CodeMastery check12 min40 XPOpen

Recursion Errors and Robustness