file settings and cleanup


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#######################################################################
#   clean a path and unlist it (for setDir())
#     - expects Windows backslashes '\'
cleanPath <- function(filename = choose.files()){
  x <- gsub('\\\\','/', filename)  # nice easy way to find and clean the path
	y <- (gregexpr('/', x))     # vector of positions of /
	return(list(path=x, pos=y))
}

#######################################################################
#   takes CleanPath() output as arg, returns just the filename
justFile <- function(x) {
    pos <- unlist(x$pos)
    pos <- pos[length(pos)]
    fname <- substring(x$path, pos+1, nchar(x$path))
    return(fname)
}


#######################################################################
#  nukem - erase all objects (after asking nicely)
nukem <- function(){
  x <- readline ("\n\tErase all objects? (Y)")
  if (tolower(substr(x, 1, 1)) != "n") {rm(list=ls(all=TRUE))}# NUKE all objects
  else {print("Nothing was changed.")}
}