Makes the fields and methods of an Object assignable via the \$<- and the [[<- operator
Makes the fields and methods of an Object assignable via the $<-
operator. This method is never called explicitly, but through an indirect
usage of the $<- operator, e.g. obj$name <- "foo".
1) This method will first search for a set<Name>() method, e.g. if
name has the value "age", a setAge() will be looked for.
If such a method exists it will be called with the Object as the first
argument and value as the second, e.g. setAge(this, value).
A set<Name>() is only looked for if <name> is a non-private
field. A private field is a name beginning with a . (period).
The rational for this naming convention is to be consistent
with how ls() works, which will not list such members
by default.
Moreover, excluding private fields for the search of a set<Name>()
will decrease the overhead for such field.
2) If no such method exists the value will be assigned to an
existing field named name, if such exists.
3) Otherwise, the value will be assigned to a static field, if such exists.
4) In all other case, the value is assigned to a new field.
Because any set<Name>() is called first, it is possible to
encapsulate (hide away) fields with certain names or to put
restrictions to what values can be assigned to them.
## S3 replacement method for class 'Object' this$name <- value ## S3 replacement method for class 'Object' this[[name]] <- value
name |
The name of the |
value |
The value to be assigned. |
Returns itself, i.e. this, as all $<- methods must do.
Henrik Bengtsson
For more information see Object.
## Not run: For a complete example see help(Object).
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