IN Ruby you can do interpolation in double-quoted strings with the #{ } operator. The expression between the curlies is evaluated and passed to the result's to_s method, then stuffed into the string.
So you'd create a string of html:
html = %Q{
<html>
<head>
<base href="#{myroot}" />
<link rel="stylesheet" href="resources/css/webdialogs.css" />
</head>
<body>
</body>
</html>
}
my_dialog.set_html(html)
You can also use a HEREDOC.
See: http://ruby-doc.org/core-2.0.0/doc/syntax/literals_rdoc.html
