Re: Predicate for a string representing an integer

[caagr98]

On 05/30/17 11:13, Jan-Peter Voigt wrote:
> I doubt that checking all characters in the string are in the range 
> '0'-'9' is faster then string->number.

Don't forget the optional leading hyphen, base specifiers (#x, #o, #d, 
#b), etc.

However, do keep in mind that (integer? (string->number x)) accepts 
"2/2", "1.0", "1e10", and even "1.0000000000000001" as integers, which 
might not be what you want.