• NewName (6/6) Jan 31 2012 Hello all.
• Trass3r (1/5) Jan 31 2012 Try ^ and $ if applicable. These match start and end of a line.
• Justin Whear (3/10) Jan 31 2012 You want to match the beginning and end of the input as well:
• NewName (1/3) Jan 31 2012 Thanks.
• bearophile (9/11) Jan 31 2012 Also:

NewName <b5658606 nwldx.com> writes:

Hello all.
I want to write a regex to check if a whole string is a number.
With my current regex("[0-9]+") numbers will be carved out of things like
"aaa456" (hit: 456) and I circumvent this by checking the lengths for
inequality, which is stupid. My regex is surely missing something?

Thank you for reading.

Trass3r <un known.com> writes:

 I want to write a regex to check if a whole string is a number.
 With my current regex("[0-9]+") numbers will be carved out of things like
 "aaa456" (hit: 456) and I circumvent this by checking the lengths for
 inequality, which is stupid. My regex is surely missing something?

Try ^ and $ if applicable. These match start and end of a line.

Justin Whear <justin economicmodeling.com> writes:

On Tue, 31 Jan 2012 16:29:43 +0000, NewName wrote:

 Hello all.
 I want to write a regex to check if a whole string is a number. With my
 current regex("[0-9]+") numbers will be carved out of things like
 "aaa456" (hit: 456) and I circumvent this by checking the lengths for
 inequality, which is stupid. My regex is surely missing something?
 
 Thank you for reading.

You want to match the beginning and end of the input as well:
"^[0-9]+$"

NewName <b5664031 nwldx.com> writes:

 You want to match the beginning and end of the input as well:
 "^[0-9]+$"

Thanks.

bearophile <bearophileHUGS lycos.com> writes:

NewName:

 Hello all.
 I want to write a regex to check if a whole string is a number.

Also:

import std.stdio, std.string, std.array;
void main() {
    string s = "123";
    assert(s.removechars("0-9").empty);
}

Bye,
bearophile