Options

Options -- an option used with method to specify names of optional arguments and their default values.

f = method(Options => w) -- creates a method which accepts optional arguments. Here 'w' is a list {A=>a,B=>b,...} of optional argument names A,B,... and corresponding default values a,b,...

When optional arguments are specified, the method functions installed should accept an additional argument to which will be passed a hash table of type OptionTable containing the optional argument names and their values. The table will be stored in the OptionsRegistry and can be recovered with the function options.

     i1 = f = method(Options => {Slope => 1, Intercept => 1})
     
     o1 = f
     
     o1 : Function

     i2 = f RR := (x,options) -> options.Slope * x + options.Intercept
     
     o2 = --function--
     
     o2 : Function

     i3 = f(5.,Slope=>100)
     
     o3 = 501.
     
     o3 : RR