What this snippet does
Two pointers from both ends of a sorted array find pairs in O(n) instead of the brute-force O(n²).
Expected output
[ 1, 4 ] [ 0, 1 ]
Why practise typing this
Typing algorithms 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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