What this snippet does
Local Symbol() calls always create unique symbols, even if they share the same description; they will never equal global Symbol.for() instances.
Expected output
false
Why practise typing this
Typing symbols & iterators code builds muscle memory for the symbols and indentation TypeScript uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.
More TypeScript practice
- Declaring a unique symbolSymbols & Iterators · advanced
- Using Symbol.iterator to make an object iterableSymbols & Iterators · advanced
- Accessing symbol properties with string keysSymbols & Iterators · advanced
- Implementing a basic iterator interfaceSymbols & Iterators · advanced
- Custom collection iterator with done stateSymbols & Iterators · advanced
- Forgetting to return done: trueSymbols & Iterators · advanced