Merge pull request #238 from GenieFramework/hh-indexing

support indexing with `end`

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

test/runtests.jl

@@ -380,6 +380,22 @@ end
     @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
+
 @testset "adding and removing stylesheets" begin
     function my_css()
         [style("""
@@ -399,4 +415,4 @@ end
     @test Stipple.Layout.THEMES[end] == my_css
     remove_css(my_css, byname = true)
     @test findfirst(==(my_css), Stipple.Layout.THEMES) === nothing
-end
+end