Question

I am trying to determine if a string has more than 1 capital letter in a row at the start of a string. I have the following regex but it doesn’t work:

`^[A-Z]{2,1000}`

I want it to return true for:

• ABC
• ABc
• ABC ABC
• ABc Abc

But false for:

• Abc
• AbC
• Abc Abc
• Abc ABc

I have the 1000 just because I know the value won’t be more than 1000 characters, but I don’t care about restricting the length.

I am working with PHP, if it makes any difference.

Answer 1

Wouldn’t leaving the second one do it?

^[A-Z]{2,}

Which basically says “string starts with 2 or more capital letters”

Here’s some tests with the strings you provided that should match:

>>> 'ABC'.match(/^[A-Z]{2,}/);
["ABC"]
>>> 'ABc'.match(/^[A-Z]{2,}/);
["AB"]
>>> 'ABC ABC'.match(/^[A-Z]{2,}/);
["ABC"]
>>> 'ABc Abc'.match(/^[A-Z]{2,}/);
["AB"]

And then the ones it shouldn’t match for:

>>> 'Abc'.match(/^[A-Z]{2,}/);
null
>>> 'AbC'.match(/^[A-Z]{2,}/);
null
>>> 'Abc Abc'.match(/^[A-Z]{2,}/);
null
>>> 'Abc ABc'.match(/^[A-Z]{2,}/);
null

If you only want to match the first two, you can just do {2}