1 files changed, 8 insertions, 3 deletions
diff --git a/spec/reference.bqn b/spec/reference.bqn
index 5d5424d8..1d0a5cca 100644
--- a/spec/reference.bqn
+++ b/spec/reference.bqn
@@ -182,6 +182,7 @@ Depth←IsArray◶0‿{1+0⌈´Depth¨⥊𝕩}
 ⚇ ← _depthOp_
 ⍟ ← _iterate_
 ˘ ← ⎉¯1
+˝ ← _insert
 ` ← _scan
 
 DropV← {⊑⟜𝕩¨𝕨+↕𝕨-˜≠𝕩}
@@ -211,6 +212,10 @@ _rankOp_←{
   }
   > ((⊑k)Enc𝕨) 𝔽¨ ((1-˜≠)⊸⊑k)Enc𝕩
 }
+_insert←{
+  ! 1≤=𝕩
+  𝕨 𝔽´ <˘𝕩
+}
 _scan←{
   ! IsArray 𝕩
   ! 1≤=𝕩
@@ -354,7 +359,7 @@ Group←{
 IndexOf←{
   c←1-˜=𝕨
   ! 0≤c
-  𝕨 (0<≠𝕨)◶⟨0⎉c∘⊢,((+´<˘)∧`)≢⎉c⎉c‿∞⟩ 𝕩
+  𝕨 (0<≠𝕨)◶⟨0⎉c∘⊢,(+´˝∧`)≢⎉c⎉c‿∞⟩ 𝕩
 }
 UniqueMask←{
   ! 1≤=𝕩
@@ -403,8 +408,8 @@ _bins←{
   c←1-˜=𝕨
   ! 0≤c
   LE←𝔽⎉c≤0˜
-  ! (0<≠)◶⟨1,∧´·LE´˘2↕<˘⟩𝕨
-  𝕨 (0<≠𝕨)◶⟨0⎉c∘⊢,(+´<˘)LE⎉¯1‿∞⟩ 𝕩
+  ! (0<≠)◶⟨1,∧´·LE˝˘2↕⊢⟩𝕨
+  𝕨 (0<≠𝕨)◶⟨0⎉c∘⊢,+´˝LE⎉¯1‿∞⟩ 𝕩
 }
 
 OccurrenceCount ← ⊐˜(⊢-⊏)⍋∘⍋