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Find all elements where a is a prefix of b. ("in" is a prefix of "inside") A will appear before b in the array. Return the count of such pairs. Pairs do not need to be consecutive. countPrefix(["cat", "caterpillar", "dog", "ca"]) → 1 countPrefix(["ca", "cat", "caterpillar", "dog"]) → 3 ...Save, Compile, Run (ctrl-enter) |
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