What this snippet does
Maybe prevents null reference errors by wrapping values — map skips the function if the value is null, enabling safe chaining.
Expected output
NY Unknown
Why practise typing this
Typing functional patterns code builds muscle memory for the symbols and indentation JavaScript 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.
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