1.109.3 Get methods

number <-catch_all: selector=name, argument=unchecked ... -> copy=number

Makes all send operations available as get operations so that the receiving number is not modified:

?- new(N, number(2)),
   get(N, plus, 3, N2),
   get(N2, value, V2).

V2 = 5
N2 = @1687003/number
N = @1686999/number

First creates a new number object with the same number<-value, invokes the method as a send method and, if the send succeeds, returns the copy.

number <-compare: int|number|real -> {smaller,equal,larger}

Compare to the argument. The result smaller implies the receiver is smaller than the argument. Intended to support chain->sort and friends. To sort a chain of integers by value:

send(Chain, sort, ?(@arg1, compare, @arg2)).