Re: On removing some obsolete code from subr and core

[Dmitry Gutov]

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 "<stdin>", line 1, in <module>
> 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.