Скачать или смотреть Understanding Short Circuit Evaluation Using &&

In this tutorial I want to explain how short circuit evaluation works with the Logical AND (&&) operator. Most everyone understands logical AND when used in a conditional (both sides need to evaluate to true in order for the conditional to be true), but when it is used in short circuit, the meaning is sometimes lost.

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Tutorials referred to in this video:
Truthy and Falsy Values:    • JavaScript Truthy and Falsy: When to Use i...  

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