From b2374aef747b4988417f896fdf33852dd57b9b07 Mon Sep 17 00:00:00 2001
From: Marshall Lochbaum <mwlochbaum@gmail.com>
Date: Wed, 3 Feb 2021 13:43:13 -0500
Subject: Rename Unique Mask to Mark Firsts

---
 spec/primitive.md  | 4 ++--
 spec/reference.bqn | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

(limited to 'spec')

diff --git a/spec/primitive.md b/spec/primitive.md
index 5fc15001..829729f8 100644
--- a/spec/primitive.md
+++ b/spec/primitive.md
@@ -165,9 +165,9 @@ For **Select** (`⊏`), `𝕨` is an array of natural numbers, or a list of such
 
 **Match** (`≡`) indicates whether two values are considered equivalent. It always returns 0 or 1, and never causes an error. If both arguments are atoms then it is identical to `=`, and if one is an atom and the other an array then it returns 0. If both arguments are arrays then it returns 1 only if they have the same shape and all pairs of corresponding elements match. Fill elements aren't taken into account, so that arrays that match might still differ in behavior. **Not Match** simply returns the complement of Match, `¬≡`.
 
-Monadic search functions compare the major cells of `𝕩` to each other. `𝕩` must have rank at least 1. Except for Unique (`⍷`), the result is a list of numbers with the same length as `𝕩`.
+Monadic search functions compare the major cells of `𝕩` to each other. `𝕩` must have rank at least 1. Except for Deduplicate (`⍷`), the result is a list of numbers with the same length as `𝕩`.
 
-- **Unique Mask** (`∊`) returns 1 for a cell if it doesn't match any earlier cell and 0 if it does.
+- **Mark Firsts** (`∊`) returns 1 for a cell if it doesn't match any earlier cell and 0 if it does.
 - **Deduplicate** (`⍷`) filters major cells to remove duplicates, retaining the ordering given by the first appearance of each unique cell.
 - **Classify** (`⊐`) returns, for each cell, the smallest index of a cell that matches it (it's necessarily less than or equal to `↕≠𝕩` element-wise, since each cell matches itself).
 - **Occurrence Count** (`⊒`) returns the number of earlier cells matching each cell.
diff --git a/spec/reference.bqn b/spec/reference.bqn
index bdfc1f2c..42949e56 100644
--- a/spec/reference.bqn
+++ b/spec/reference.bqn
@@ -354,7 +354,7 @@ Replicate ← {0<=𝕨}◶(⥊˜⟜≠Rep⊢)‿{!𝕨=○≠𝕩⋄𝕨Rep𝕩}
 ⊔ ← ⊔⟜(↕≠⚇1)       ⊘ Group
 ⍉ ← Transpose      ⊘ ReorderAxes
 ⊐ ← ⍷⊸⊐            ⊘ IndexOf
-∊ ← UniqueMask     ⊘ (⊐˜<≠∘⊢)
+∊ ← MarkFirst      ⊘ (⊐˜<≠∘⊢)
 ⍷ ← ∊⊸/            ⊘ Find
 ⍋ ←   Cmp _grade   ⊘ (  Cmp _bins)
 ⍒ ← -∘Cmp _grade   ⊘ (-∘Cmp _bins)
@@ -398,7 +398,7 @@ IndexOf←{
   ! c≤=𝕩
   𝕨 (0<≠𝕨)◶⟨0⎉c∘⊢,(+˝∧`)≢⎉c⎉c‿∞⟩ 𝕩
 }
-UniqueMask←{
+MarkFirst←{
   ! 1≤=𝕩
   u←0↑𝕩
   {⊑𝕩∊u}⊘{u↩u∾𝕩⋄1}‿0˘𝕩
-- 
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