You're right, .replace("", "x") and .split("") definitely have ambiguous meanings.
One thought I just had now though is thinking what if replace was using indexOf internally. Without a special case for an empty string, it could easily get stuck replacing the character at index 0 because indexOf said it found it there.
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You're right,
.replace("", "x")and.split("")definitely have ambiguous meanings.One thought I just had now though is thinking what if
replacewas usingindexOfinternally. Without a special case for an empty string, it could easily get stuck replacing the character at index0becauseindexOfsaid it found it there.