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source("incl/start,load-only.R")
message("*** fold() ...")
x1s <- list(
a = NULL,
b = 1,
c = c(a = 1, b = 2),
d = 1:10e3
)
x2s <- lapply(x1s, FUN = as.list)
names(x2s) <- toupper(names(x1s))
x3s <- list(
E = data.frame(a = 1:3),
F = data.frame(a = 1:3, b = letters[1:3], stringsAsFactors=FALSE)
)
xs <- c(x1s, x2s, x3s)
fcns <- list("c" = base::c, "cbind" = base::cbind)
for (kk in seq_along(xs)) {
x_name <- names(xs)[kk]
for (fcn_name in names(fcns)) {
fcn <- fcns[[fcn_name]]
message(sprintf(" - #%d. %s(x[['%s']]) ...", kk, fcn_name, x_name))
x <- xs[[kk]]
str(list(x = x))
y0 <- Reduce(x, f = fcn)
y1 <- fold(x, f = fcn)
y2 <- fold(x, f = fcn, unname = FALSE)
str(list(y0 = y0, y1 = y1, y2 = y2))
stopifnot(all.equal(unname(y1), unname(y0)))
stopifnot(all.equal(unname(y2), unname(y0)))
if (!fcn_name %in% "cbind") {
stopifnot(all.equal(y1, y0))
stopifnot(all.equal(y2, y0))
}
y0 <- Reduce(x, f = fcn, right = TRUE)
y1 <- fold(x, f = fcn, left = FALSE)
y2 <- fold(x, f = fcn, left = FALSE, unname = FALSE)
str(list(y0 = y0, y1 = y1, y2 = y2))
stopifnot(all.equal(unname(y1), unname(y0)))
stopifnot(all.equal(unname(y2), unname(y0)))
if (!fcn_name %in% "cbind") {
stopifnot(all.equal(y1, y0))
stopifnot(all.equal(y2, y0))
}
message(sprintf(" - #%d. %s(x[['%s']]) ... DONE", kk, fcn_name, x_name))
}
}
make_table <- function(n) {
data.frame(key = sample(n), value = sample(n), stringsAsFactors=FALSE)
}
sizes <- rep(10, 20)
set.seed(3180)
tables <- lapply(sizes, make_table)
key_merge <- function(x, y) merge(x, y, by = "key", all = FALSE)
suppressWarnings(
folded <- fold(tables, key_merge, left = TRUE, unname = FALSE,
threshold = 6L)
)
suppressWarnings(
reduced <- Reduce(key_merge, tables[-1], tables[[1]])
)
stopifnot(all.equal(unname(folded), unname(reduced)))
message("*** fold() ... DONE")
source("incl/end.R")
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