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-rw-r--r--spec/reference.bqn2
1 files changed, 1 insertions, 1 deletions
diff --git a/spec/reference.bqn b/spec/reference.bqn
index 179ee71d..c1c4c6cb 100644
--- a/spec/reference.bqn
+++ b/spec/reference.bqn
@@ -361,7 +361,7 @@ Replicate ← {0<=𝕨}◶(⥊˜⟜≠Rep⊢)‿{!𝕨=○≠𝕩⋄𝕨Rep𝕩}
∨ ↩ ⍒⊸⊏ ⊘ ∨
⊒ ← OccurrenceCount⊘ ProgressiveIndexOf
-Join←{
+Join←(0<=)◶{!IsArray𝕩⋄>𝕩}‿{
C←(<⟨⟩)⥊⊸∾⌜´⊢ # Cartesian array product
! IsArray 𝕩
s←≢¨𝕩