Web Reference: Jul 23, 2025 · The longest common prefix for an array of strings is the common prefix between 2 most dissimilar strings. For example, in the given array {"apple", "ape", "zebra"}, there is no common prefix because the 2 most dissimilar strings of the array "ape" and "zebra" do not share any starting characters. Return the longest path prefix (taken character-by-character) that is a prefix of all paths in list. If list is empty, return the empty string (''). Note that this may return invalid paths because it works a character at a time. For comparison to the other answers, here's the code: A common prefix is a sequence of characters that appears at the start of every string. For example, if you have the strings ["flower", "flow", "flight"], the longest common prefix would be "fl" since all three strings start with these two characters.
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