activesupport/lib/active_support/file_update_checker.rb
# It accepts two parameters on initialization. The first is an array
# of files and the second is an optional hash of directories. The hash must
# have directories as keys and the value is an array of extensions to be
# watched under that directory.
#
# This method must also receive a block that will be called once a path
# changes. The array of files and list of directories cannot be changed
# after FileUpdateChecker has been initialized.
It accepts two parameters on initialization. The first is an array
of files and the second is an optional hash of directories. The hash must
have directories as keys and the value is an array of extensions to be
watched under that directory.

This method must also receive a block that will be called once a path
changes. The array of files and list of directories cannot be changed
after FileUpdateChecker has been initialized.
It accepts two parameters on initialization . The first is an array of files and the second is an optional hash of directories . The hash must have directories as keys and the value is an array of extensions to be watched under that directory . This method must also receive a block that will be called once a path changes . The array of files and list of directories cannot be changed after FileUpdateChecker has been initialized .
def compile_ext(array)
      array = Array(array)
      return if array.empty?
      ".{#{array.join(",")}}"
    end
def compile_ext ( array ) array = Array ( array ) return if array . empty? ".{#{array.join(",")}}" end
It accepts two parameters on initialization.
It accepts two parameters on initialization .
array
<not_specific>