From 039f74dbd4df982444396ea873b99b9b960d62bb Mon Sep 17 00:00:00 2001
From: hhaensel <helmut.haensel@gmx.de>
Date: Wed, 8 Nov 2023 13:44:38 +0100
Subject: [PATCH] support indexing with `end`

---
 src/stipple/reactivity.jl |  3 +++
 test/runtests.jl          | 16 ++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/src/stipple/reactivity.jl b/src/stipple/reactivity.jl
index 52274fb4..b4ce33be 100644
--- a/src/stipple/reactivity.jl
+++ b/src/stipple/reactivity.jl
@@ -121,6 +121,9 @@ end
 import Base.map!
 @inline Base.map!(f::F, r::Reactive, os...; update::Bool=true) where F = Base.map!(f::F, getfield(r, :o), os...; update=update)
 
+Base.axes(r::Reactive, args...) = Base.axes(getfield(getfield(r, :o), :val), args...)
+Base.lastindex(r::Reactive, args...) = Base.lastindex(getfield(getfield(r, :o), :val), args...)
+
 const R = Reactive
 const PUBLIC = 1
 const PRIVATE = 2
diff --git a/test/runtests.jl b/test/runtests.jl
index 57fb4221..808ebf93 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -378,4 +378,20 @@ end
     @test Stipple.json(jt1) == "json text 1"
     @test JSON.json(jt2) == "json text 2"
     @test Stipple.json(jt2) == "json text 2"
+end
+
+@testset "Indexing with `end`" begin
+    r = R([1, 2, 3])
+    on(r) do r
+        r[end - 1] += 1
+    end
+    @test r[end] == 3
+    r[end] = 4
+    @test r[end - 1] == 3
+    @test r[end] == 4
+
+    df = DataFrame(:a => 1:3, :b => 12:14)
+    @test df[end, 1] == 3
+    @test df[end, end] == 14
+    @test df[:, end] == 12:14
 end
\ No newline at end of file