lex

Lex, a name-value store

• lex∆init: Returns an empty store
• lex∆assign: Returns a new lexicon with the supplied name--value
  inserted into the supplied lexicon.
  Syntax: result←lexicon lex∆assign name value
• lex∆lookup: Returns the value of the supplied name.
  Syntax: value←lexicon lex∆lookup name
• lex∆is: Predicate to return true if the supplied item is in fact a
  lexicon
• lex∆keys: Returns the list of names in the supplied lexicon
• lex∆values: Returns a list of values in the supplied lexiicon

At this writing we use and-dot-equals to do a sequential search of the
list of names. We plan to add a hashing algorithm so that larger data
set may be served.