What this snippet does
Closures keep the entire outer scope alive — if you close over a large object you no longer need, null it out to allow GC.
Expected output
result result
Why practise typing this
Typing performance 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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