Quick JavaScript Crash Course - Modern and Advanced JavaScript - Let Const Rather than Var

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Information Technology (IT), Architecture

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University

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Practice Problem

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Hard

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The lecture discusses the issues with the 'WAR' keyword and introduces 'let' and 'construction' as replacements. 'Let' is used for block-scoped variables, ensuring correct behavior in loops. 'Construction' is used for constants, preventing reassignment. The lecture also covers the limitations of 'const' in protecting object references and suggests using the 'freeze' method for deeper protection. Best practices recommend using 'let' for variables that change and 'const' for constants.

3 questions

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OPEN ENDED QUESTION

3 mins • 1 pt

How does the 'const' keyword protect the reference to an object in JavaScript?

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OPEN ENDED QUESTION

3 mins • 1 pt

What is meant by a 'shallow freeze' in the context of JavaScript objects?

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OPEN ENDED QUESTION

3 mins • 1 pt

Summarize the key takeaways regarding the use of 'let', 'const', and 'WAR' from the lecture.

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