In ruby programming.

Create a Ruby definition which adds some small methods to the standard String and Array classes which might be of some use in writing a program to generate HTML output. The methods are:

String#hesc

Add the hesc method to the String class. It takes no arguments, and returns a copy of the string with each of the characters <, > and & replaced with their appropriate HTML entities. For instance,

"I like less-than (<) and ampersand (&)".hesc

returns the string

"I like less-than (<) and ampersand (&)"