JavaScript

1.hoisting, garbage collector, unmanaged

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2.데이터타입의 필요성

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3.Optional chaining 옵셔널 체이닝

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4.구조분해할당

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5.closure

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6.자바스크립트 동작 원리

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7.일급 객체 (first-class object)

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8.JavaScript는 Prototype? OOP?

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9.JavaScript에서 this 란?

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10.실행 컨텍스트(execution context)

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