The problem is not only suited to Lisp because of the reason Anonymonk gave, but also because the most elegant solution to this problem is one that requires more exposure to CS than most Java programmers (in my experience) tend to have. I just coded up something similar in JS for a Go-playing program I'm playing with (thanks to tye
's NextPermute() implementation in Algorithm::Loops
). I have no desire to actually write it, so I'll give my plan in readmore tags below.
The problem is really a graph-walking problem. Each letter corresponds to a set of vertices. The phone number creates a graph between each set of letters along with the punctuation. Once the graph is created, you walk all the various end-to-end paths (using NextPermute(), for example) and compare the resulting string with the dictionary. Shouldn't take more than 100 lines.
My criteria for good software:
- Does it work?
- Can someone else come in, make a change, and be reasonably certain no bugs were introduced?
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||