== StringBuilder ==

Cobra strings are immutable. To create something like a mutable string, use StringBuilder:
{{{
#!cobra
def visitMessage(url) as String
    sb = StringBuilder()
    sb.appendLine('Hello [.name],')
    sb.appendLine('Please visit [url].')
    s.append(' (Beware of the trolls).')    # append without newline sep
    return sb.toString
}}}

If you would like to use explicit platform varying newlines in your code, try `CobraCore.newLine` which returns the newline specific to the current platform such as '\n' or '\r\n':
{{{
#!cobra
def visitMessage(url) as String
    nl = CobraCore.newLine
    sb = StringBuilder()
    sb.append('Hello [.name],[nl]')
    sb.append('Please visit [url].[nl]')
    return sb.toString
}}}

For more information on the StringBuilder class, see [http://www.google.com/search?hl=en&q=C%23+stringbuilder Google(C# StringBuilder)]

See also: LibraryTopics