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List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:209191 Archived-At: On 05.11.2016 19:23, Clément Pit--Claudel wrote: >> ELISP> (string-to-number "abc") >> 0 (#o0, #x0, ?\C-@) >> ELISP> (string-to-number "22.2abc") >> 22.2 > > I know, I know :) (what is this fancy ELISP repl, btw?) M-x ielm. :) > Hmm. I'd expect string-to-int to error on non-ints: > >>>> int("1.3") > Traceback (most recent call last): > File "", line 1, in > ValueError: invalid literal for int() with base 10: '1.3' No so in Elisp. Or JavaScript: > parseInt("123abc") => 123 ¯\_(ツ)_/¯ If you really need to error, string-match-p is probably your best bet.