Re: Determining validity of mathematical expression before evaluation
Rudolf Adamkovič <[email protected]>
| Newsgroups | gmane.emacs.help |
|---|---|
| Message-ID | <[email protected]> |
Heime <[email protected]> writes: [I forgot to CC the list; sorry for the duplicate message.] >> Is it possible to determine whether an elisp mathematical expression >> is valid before evaluating it? That depends entirely on what you consider a valid mathematical expression. :) > I call bc. Why not Lisp instead? (string-to-number (calc-eval "10 + 5 * 2")) => 20 Rudy -- "One can begin to reason only when a clear picture has been formed in the imagination." --- Walter Warwick Sawyer, Mathematician's Delight, 1943 Rudolf Adamkovič <[email protected]> [he/him] http://adamkovic.org