Nothing
test_lhs_eval_ad_hoc <- function() {
# without the .() notation (not quiet what we want from the user)
d <- data.frame(x = 1)
ops <- local_td(d)
for(i in 1:3) {
ops <- extend(ops, paste0("v_", i) %:=% (i+1))
}
invisible(NULL)
}
test_lhs_eval_ad_hoc()
test_lhs_eval_b <- function() {
# with the .() notation (the strict form)
d <- data.frame(x = 1)
ops <- local_td(d)
for(i in 1:3) {
ops <- extend(ops, .(paste0("v_", i)) %:=% (i+1))
}
invisible(NULL)
}
test_lhs_eval_b()
test_lhs_eval_b2 <- function() {
# with the .() notation (the strict form)
d <- data.frame(x = 1)
ops <- local_td(d)
for(i in 1:3) {
v_i <- paste0("v_", i)
ops <- extend(ops, .(v_i) %:=% (i+1))
}
invisible(NULL)
}
test_lhs_eval_b2()
test_lhs_eval_b2b <- function() {
# with the .() notation (the strict form)
d <- data.frame(x = 1)
var <- 'y'
# should be var
ops1 <- local_td(d) %.>%
extend(., var := 1)
expect_true(length(grep('y', format(ops1)))==0)
expect_true(length(grep('var', format(ops1)))==1)
# should be y
ops2 <- local_td(d) %.>%
extend(., .(var) := 1)
expect_true(length(grep('var', format(ops2)))==0)
expect_true(length(grep('y', format(ops2)))==1)
invisible(NULL)
}
test_lhs_eval_b2b()
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