Groovy GDK equivalent of Apache Commons StringUtils.capitalize(str) or Perl's ucfirst(str)

Question

Yes/no-question: Is there a Groovy GDK function to capitalize the first character of a string?

I'm looking for a Groovy equivalent of Perl's ucfirst(..) or Apache Commons StringUtils.capitalize(str) (the latter capitalizes the first letter of all words in the input string).

I'm currently coding this by hand using ..

str = str[0].toUpperCase() + str[1 .. str.size() - 1]

.. which works, but I assume there is a more Groovy way to do it. I'd imagine ucfirst(..) being a more common operation than say center(..) which is a standard method in the Groovy GDK (see http://groovy.codehaus.org/groovy-jdk/java/lang/String.html).

Answer 1

No, nothing built directly into the language.

There are a couple of more groovy ways to do what you're asking though (if you don't want to use StringUtils in the Java idiomatic way as Vladimir suggests).

You can simplify your method using a negative value in the second half of your range:

def str = "foo"

assert "Foo" == str[0].toUpperCase() + str[1..-1]

Or you can use an import static to make it look like a native method:

import static org.apache.commons.lang.StringUtils.*

assert "Foo" == capitalize("foo")

You can also modify the metaClass to have all of StringUtils methods right on it, so it looks like a GDK method:

import org.apache.commons.lang.StringUtils

String.metaClass.mixin StringUtils

assert "Foo" == "foo".capitalize()