inst/examples/use_method.R

In harvestr: A Parallel Simulation Framework

library(harvestr)
library(plyr)
mr <- setRefClass("HelloWorld",
  fields = list(
    x = 'integer',
    name = 'character'),
  methods = list(
    hello = function(){
      invisible(name)
    },
    times = function(y){
      x*y
    },
    babble  = function(n){
      paste(sample(letters), collapse='')      
    }
  )
)
p <- data.frame(x=as.integer(1:26), name=letters, stringsAsFactors=FALSE)
# create list of objects
objs <- mlply(p, mr$new)
# plant seeds to prep objects for harvest
objs <- plant(objs)
# run methods on objects
talk <- harvest(objs, use_method(babble), .progress='none', .parallel=FALSE)
unlist(talk)
# and to show reproducibility
more.talk <- harvest(objs, use_method(babble), .progress='none', .parallel=FALSE)
identical(unlist(talk), unlist(more.talk))