Data structure behind T9 type of dictionary

Posted by anony on Stack Overflow See other posts from Stack Overflow or by anony
Published on 2010-04-04T09:26:58Z Indexed on 2010/04/04 9:33 UTC
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How does a T9 dictionary work? What is the data structure behind it. If we type '4663' we get 'good' when we press down button we get 'gone' then 'home' etc...

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