processArgs

processArgs(args,defaults,function) -- Here args is the sequence of arguments previously passed to some function intended to accept optional arguments, defaults is a hash table whose keys are the names of the optional arguments, and whose values are the corresponding default values. The return value is obtained by evaluation of function(newargs,options) , where newargs is obtained from args by removing the options of the form X=>A (where X is a name of an optional argument), and options is a hash table of the same form as defaults in which the default values have been replaced by the user-supplied values, e.g., the value stored under the key X has been replaced by A . As shorthand for the option X=>true the one may use X .

     i1 = processArgs((t,u,a=>4,c), new HashTable from {a=>1,b=>2,c=>false},identity)
     
     o1 = (t,u,c),OptionTable{a => 4    }
                              b => 2
                              c => false
     
     o1 : Sequence