tasks a-s

2013-04-10 23:57:08 -07:00 · 2013-04-10 23:57:08 -07:00 · b83f433714
commit b83f433714
parent 47bf37c096
12433 changed files with 156208 additions and 123 deletions
--- a/Task/Null-object/R/null-object.r
+++ b/Task/Null-object/R/null-object.r
@ -0,0 +1,6 @@
+is.null(NULL)       # TRUE
+is.null(123)        # FALSE
+is.null(NA)         # FALSE
+123==NULL           # Empty logical value, with a warning
+foo <- function(){} # function that does nothing
+foo()               # returns NULL