JavaScript · Intermediate
Object Destructuring with Aliasing and Defaults
Destructuring allows extracting object properties into variables with custom names (aliasing) and default values if the property is missing.
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Intermediate JavaScript exercises
Read these Intermediate JavaScript snippets line by line — each one comes with a written breakdown of what the code does and why.
JavaScript · Intermediate
Private State with Closures
A closure is created when an inner function references variables from its outer scope, allowing for private data encapsulation.
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Resilient Parallel Async with Promise.allSettled
Unlike Promise.all, Promise.allSettled waits for all promises to finish regardless of whether they fulfilled or rejected.
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