Question

I have a regexp which checks if a value has at least 10 digits:

if (foo.match(/^\d{10,}$/))
{
 // At least 10 digits
}

However I want to divide the validation in 2 steps, so first i check if foo has got only numbers, and no other characters, and then i check if its got at least 10 digits.

I can check the 10 digits part using foo.length, but how do i change the regexp above to check if foo has got only numbers. Any ideas?

Answer 1

One solution: change the qualification from “10 or more” to “one or more”, thusly:

if (foo.match(/^\d+$/))
{
 // At least 1 digit
}

If the empty string is acceptable, use * instead of + to match “zero or more.”