A variant of a trie is a digital tree, which processes information on the level of bits. Because there are only two bits, only two outcomes are possible. Digital trees are binary. For example, to test whether the word “BOOK” is in the tree, we do not use the first letter, “B,” in the root to determine to which of its children we should go, but the first bit, 0, of the first letter (ASCII(B) 5 01000010), on the second level, the second bit, and so on before we get to the second letter. Is it a good idea to use a digital tree for a spell checking program, as was discussed in the case study?
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