Data commit

Task/Power-set/Julia/power-set-1.julia

@@ -0,0 +1,7 @@
+function powerset(x::Vector{T})::Vector{Vector{T}} where T
+    result = Vector{T}[[]]
+    for elem in x, j in eachindex(result)
+        push!(result, [result[j] ; elem])
+    end
+    result
+end

Task/Power-set/Julia/power-set-2.julia

@@ -0,0 +1,18 @@
+using Base.Iterators
+
+function bitmask(u, max_size)
+    res = BitArray(undef, max_size)
+    res.chunks[1] = u%UInt64
+    res
+end
+
+function powerset(input_collection::Vector{T})::Vector{Vector{T}} where T
+    num_elements = length(input_collection)
+    bitmask_map(x) = Iterators.map(y -> bitmask(y, num_elements), x)
+    getindex_map(x) = Iterators.map(y -> input_collection[y], x)
+
+    UnitRange(0, (2^num_elements)-1) |>
+        bitmask_map |>
+        getindex_map |>
+        collect
+end