Operators are applied to expressions using post-fix notation with a period (.) as the separator. For example, if a is a string, the lc() operator, which lowers the case of all the characters in the string, is applied to a as follows:
a.lc()
Operators can be chained. The following expression splits a into an array and then calculates the length of the resulting array:
a.split(re/;/).length()
The following sections describe operators currently available. They are organized based on the kind of value on which they operate.