What this snippet does
Linked lists use node references instead of contiguous memory — O(1) prepend but O(n) access by index.
Expected output
[ 1, 2, 3 ] 3
Why practise typing this
Typing data structures 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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