Only source functions in a .R file

Question

I would like source() to only find and load functions within a .R file.

For example, in the file Analysis.R:

print.hw <         


        

Answer 1

This works without using regex. It's also probably less computationally efficient than regex solutions. It creates a new environment, sources the entire file, then returns only the functions back to the global environment.

SourceFunctions<-function(file) {
  MyEnv<-new.env()
  source(file=file,local=MyEnv)
  list2env(Filter(f=is.function,x=as.list(MyEnv)),
           envir=parent.env(environment()))
}