How can you determine if a string is all caps with a regular expression. It can include punctuation and numbers, just no lower case letters.
+1
A:
Why not just use if(string.toUpperCase() == string)? ._. Its more "elegant"...
I think you're trying to force in RegExp, but as someone else stated, I don't think this is the best use of regexp...
ItzWarty
2010-02-24 05:58:24
How do you use that, for example, to extract all satisfactory lines with a `grep`?
Alex Martelli
2010-02-24 06:00:37
+1
A:
The string contains a lowercase letter if the expression /[a-z]/ returns true, so simply perform this check, if it's false you have no lowercase letters.
Mark E
2010-02-24 05:58:32
A:
$str="ABCcDEF";
if ( preg_match ("/[a-z]/",$str ) ){
echo "Lowercase found\n";
}
ghostdog74
2010-02-24 06:06:52
A:
If you want to match the string against another regex after making sure that there are no lower case letters, you can use positive lookahead.
^(?=[^a-z]*$)MORE_REGEX$
For example, to make sure that first and last characters are alpha-numeric:
^(?=[^a-z]*$)[A-Z0-9].*[A-Z0-9]$
Amarghosh
2010-02-24 07:05:50