Elisp笔记

• M-x ielm enter into a interactive elisp evaluation mode
• difference between dotted pair and list:
  • CDR of pairs need not to be a list
  • list is more convenient for no dot notation
  • listp consp are identical on pair or list
  • use a prime notation on pair definition
• optional argument: put keyword &optional before actual arguments; if a argument is both needed and optional, elisp prefer it to be optional
• reset argument: one can have a function that takes unspecified any number of arguments. And &reset before parameter after last argument, the parameter might be a list or nil
• property list: a list of paired elements. Each of the pairs associated with a property name which is a symbol with a property or value. I usually see symbol as name with a colon prefix.