Fix tests

README.md

@@ -70,8 +70,7 @@ julia> rng = Xoshiro(42);
 
 julia> iter = Iterators.filter(x -> x != 10, 1:10^7);
 
-julia> wv(el) = 1.0
-wv (generic function with 1 method)
+julia> wv(el) = 1.0;
 
 julia> @btime itsample($rng, $iter, 10^4, algRSWRSKIP);
   12.209 ms (8 allocations: 156.47 KiB)

src/StreamSampling.jl

@@ -123,7 +123,8 @@ export ReservoirSample
 
 """
 
-    update!(rs::AbstractReservoirSample, el, [w])
+    update!(rs::AbstractReservoirSample, el)
+    update!(rs::AbstractReservoirSample, el, w::Float64)
 
 Updates the reservoir sample by scanning the passed element.
 In the case of weighted sampling also the weight of the element

src/UnweightedSamplingSingle.jl

@@ -26,30 +26,33 @@ function value(s::SampleSingleAlgR)
 end
 
 function ReservoirSample(T, method::ReservoirAlgorithm = algL)
-    return ReservoirSample(Random.default_rng(), T, method)
+    return ReservoirSample(Random.default_rng(), T, method, ms)
 end
-function ReservoirSample(rng::AbstractRNG, T, method::AlgL = algL)
+function ReservoirSample(rng::AbstractRNG, T, method::ReservoirAlgorithm = algL)
+    return ReservoirSample(rng, T, method, ms)
+end
+function ReservoirSample(rng::AbstractRNG, T, ::AlgL, ::MutSample)
     return SampleSingleAlgL{T, typeof(rng)}(1.0, 0, 0, rng)
 end
-function ReservoirSample(rng::AbstractRNG, T, method::AlgR)
+function ReservoirSample(rng::AbstractRNG, T, ::AlgR, ::MutSample)
     return SampleSingleAlgR{T, typeof(rng)}(0, rng)
 end
 
 @inline function update!(s::SampleSingleAlgR, el)
-    @imm_reset s.seen_k += 1
+    s.seen_k += 1
     if rand(s.rng) <= 1/s.seen_k
-        @imm_reset s.value = el
+        s.value = el
     end
     return s
 end
 @inline function update!(s::SampleSingleAlgL, el)
     s.seen_k += 1
     if s.skip_k > 0
-        @imm_reset s.skip_k -= 1
+        s.skip_k -= 1
     else
-        @imm_reset s.value = el
-        @imm_reset s.state *= rand(s.rng)
-        @imm_reset s.skip_k = -ceil(Int, randexp(s.rng)/log(1-s.state))
+        s.value = el
+        s.state *= rand(s.rng)
+        s.skip_k = -ceil(Int, randexp(s.rng)/log(1-s.state))
     end
     return s
 end
@@ -80,15 +83,18 @@ end
 function itsample(rng::AbstractRNG, iter, method::ReservoirAlgorithm = algL;
         iter_type = infer_eltype(iter))
     if Base.IteratorSize(iter) isa Base.SizeUnknown
-        return reservoir_sample(rng, iter, method; iter_type)
+        return reservoir_sample(rng, iter, iter_type, method)
     else 
         return sortedindices_sample(rng, iter)
     end
 end
 
-function reservoir_sample(rng, iter, method::ReservoirAlgorithm = algL;
-        iter_type = infer_eltype(iter))
+function reservoir_sample(rng, iter, iter_type, method::ReservoirAlgorithm = algL)
     s = ReservoirSample(rng, iter_type, method)
+    return update_all!(s, iter)
+end
+
+function update_all!(s, iter)
     for x in iter
         s = update!(s, x)
     end

src/WeightedSamplingSingle.jl

@@ -1,24 +1,47 @@
 
-mutable struct SampleSingleAlgARes{T,R} <: AbstractWeightedReservoirSampleSingle
+struct ImmutSampleSingleAlgARes{T,R} <: AbstractWeightedReservoirSampleSingle
+    state::Float64
+    rng::R
+    value::T
+    ImmutSampleSingleAlgARes(state, rng::R, value::T) where {T,R} = new{T,R}(state, rng, value)
+    ImmutSampleSingleAlgARes{T,R}(state, rng) where {T,R} = new{T,R}(state, rng)
+end
+mutable struct MutSampleSingleAlgARes{T,R} <: AbstractWeightedReservoirSampleSingle
     state::Float64
     const rng::R
     value::T
-    SampleSingleAlgARes{T,R}(state, rng) where {T,R} = new{T,R}(state, rng)
+    MutSampleSingleAlgARes{T,R}(state, rng) where {T,R} = new{T,R}(state, rng)
 end
+const SampleSingleAlgARes = Union{ImmutSampleSingleAlgARes, MutSampleSingleAlgARes}
 
-mutable struct SampleSingleAlgAExpJ{T,R} <: AbstractWeightedReservoirSampleSingle
+struct ImmutSampleSingleAlgAExpJ{T,R} <: AbstractWeightedReservoirSampleSingle
+    state::Float64
+    skip_w::Float64
+    rng::R
+    value::T
+    ImmutSampleSingleAlgAExpJ(state, skip_w, rng::R, value::T) where {T,R} = new{T,R}(state, skip_w, rng, value)
+    ImmutSampleSingleAlgAExpJ{T,R}(state, skip_w, rng) where {T,R} = new{T,R}(state, skip_w, rng)
+end
+mutable struct MutSampleSingleAlgAExpJ{T,R} <: AbstractWeightedReservoirSampleSingle
     state::Float64
     skip_w::Float64
     const rng::R
     value::T
-    SampleSingleAlgAExpJ{T,R}(state, skip_w, rng) where {T,R} = new{T,R}(state, skip_w, rng)
+    MutSampleSingleAlgAExpJ{T,R}(state, skip_w, rng) where {T,R} = new{T,R}(state, skip_w, rng)
 end
+const SampleSingleAlgAExpJ = Union{ImmutSampleSingleAlgAExpJ, MutSampleSingleAlgAExpJ}
 
-function ReservoirSample(rng::R, T, method::AlgARes) where {R<:AbstractRNG}
-    return SampleSingleAlgARes{T,R}(0.0, rng)
+function ReservoirSample(rng::R, T, ::AlgARes, ::MutSample) where {R<:AbstractRNG}
+    return MutSampleSingleAlgARes{T,R}(typemax(Float64), rng)
+end
+function ReservoirSample(rng::R, T, ::AlgARes, ::ImmutSample) where {R<:AbstractRNG}
+    return ImmutSampleSingleAlgARes{T,R}(typemax(Float64), rng)
+end
+function ReservoirSample(rng::R, T, ::AlgAExpJ, ::MutSample) where {R<:AbstractRNG}
+    return MutSampleSingleAlgAExpJ{T,R}(0.0, 0.0, rng)
 end
-function ReservoirSample(rng::R, T, method::AlgAExpJ) where {R<:AbstractRNG}
-    return SampleSingleAlgAExpJ{T,R}(0.0, 0.0, rng)
+function ReservoirSample(rng::R, T, ::AlgAExpJ, ::ImmutSample) where {R<:AbstractRNG}
+    return ImmutSampleSingleAlgAExpJ{T,R}(0.0, 0.0, rng)
 end
 
 function value(s::AbstractWeightedReservoirSampleSingle)
@@ -27,8 +50,8 @@ function value(s::AbstractWeightedReservoirSampleSingle)
 end
 
 @inline function update!(s::SampleSingleAlgARes, el, w)
-    priority = -randexp(s.rng)/w
-    if priority > s.state
+    priority = randexp(s.rng)/w
+    if priority < s.state
         @imm_reset s.state = priority
         @imm_reset s.value = el
     end
@@ -45,12 +68,16 @@ end
 
 function itsample(iter, wv::Function, method::ReservoirAlgorithm = algAExpJ;
         iter_type = infer_eltype(iter))
-    return itsample(Random.default_rng(), iter, wv, method; iter_type)
+    return itsample(Random.default_rng(), iter, wv, method)
 end
 
 function itsample(rng::AbstractRNG, iter, wv::Function, method::ReservoirAlgorithm = algAExpJ;
         iter_type = infer_eltype(iter))
-    s = ReservoirSample(rng, iter_type, algAExpJ)
+    s = ReservoirSample(rng, iter_type, method, ms)
+    return update_all!(s, iter, wv)
+end
+
+function update_all!(s, iter, wv::Function)
     for x in iter
         s = update!(s, x, wv(x))
     end

test/unweighted_sampling_single_tests.jl

@@ -8,7 +8,7 @@
         @test a <= z <= b
 
         iter = Iterators.filter(x -> x != b + 1, a:b+1)
-        rs = ReservoirSample(Int, method; ordered = ordered)
+        rs = ReservoirSample(Int, method)
         for x in iter
             update!(rs, x)
         end

test/weighted_sampling_single_tests.jl

@@ -9,9 +9,9 @@
         @test a <= z <= b
 
         iter = Iterators.filter(x -> x != b + 1, a:b+1)
-        rs = ReservoirSample(Int, method; ordered = ordered)
+        rs = ReservoirSample(Int, method)
         for x in iter
-            update!(rs, x)
+            update!(rs, x, wv(x))
         end
         @test a <= value(rs) <= b