don't repeat NULL in dimnames obj

Author: mschubert

R/bind.r

@@ -8,9 +8,12 @@ bind = function(arrayList, along=length(dim(arrayList[[1]]))+1) {
     arrayList = vectors_to_row_or_col(arrayList, along=along)
     re = do.call(function(...) abind::abind(..., along=along), arrayList)
 
-    # is.null(...) required because R is stupid
     if (dim(re)[along] == length(arrayList) && !is.null(names(arrayList)))
         dimnames(re)[[along]] = names(arrayList)
 
+    # replace list of NULLs to one NULL to be consistent with base R
+    if (all(sapply(dimnames(re), is.null)))
+        dimnames(re) = NULL
+
     re
 }

tests/testthat/test-bind.r

@@ -1,7 +1,7 @@
 context("bind")
 
 test_that("vector", {
-    ref = cbind(1:2, 3:4)
+    ref = rbind(1:2, 3:4)
     expect_equal(ref, bind(list(1:2, 3:4), along=1))
     expect_equal(ref, t(bind(list(1:2, 3:4), along=2)))
 })
@@ -13,9 +13,7 @@ test_that("keep names", {
     expect_equal(names(x), rownames(m))
 
     colnames(m) = LETTERS[1:2]
-    expect_equal(bind(list(m,m), along=1),
-                 rbind(m, m))
+    expect_equal(bind(list(m,m), along=1), rbind(m, m))
 
-    expect_equal(bind(list(m,m), along=2),
-                 cbind(m, m))
+    expect_equal(bind(list(m,m), along=2), cbind(m, m))
 })

tests/testthat/test-mask.r

@@ -13,6 +13,6 @@ test_that("mask", {
     2L), .Dimnames = list(c("a", "b", "c"), c("e1", "e2")))
 
     expect_equal(Zref, Z)
-    expect_equal(Zref, mask(Z, along=2))
-    expect_equal(Zref, t(mask(Z, along=1)))
+    expect_equal(Zref, mask(F, along=2))
+    expect_equal(Zref, t(mask(F, along=1)))
 })