Fix exercise etl: change type of io data to Dict

exercises/etl/example.jl

@@ -1,11 +1,11 @@
-function transform(input::AbstractArray)
+function transform(input::Dict)
     output = []
     for i = input
         for j = map(lowercase, i[2])
             pair = (j, i[1])
             push!(output, pair)
         end
     end
-    sort(output)
+    Dict(sort(output))
 end
 

exercises/etl/runtests.jl

@@ -1,38 +1,36 @@
 using Base.Test
 
-# transforms the set of scrabble data previously indexed by the tile score
-# to a set of data indexed by the tile letter
 include("etl.jl")
 
 @testset "a single letter" begin
-    input = [(1, ["A"])]
-    output = [("a", 1)]
+    input = Dict(1=>["A"])
+    output = Dict("a"=>1)
     @test transform(input) == output
 end
 
 @testset "single score with multiple letters" begin
-    input = [(1, ["A", "E", "I", "O", "U"])]
-    output = [("a", 1), ("e", 1), ("i", 1), ("o", 1), ("u", 1)]
+    input = Dict(1=>["A", "E", "I", "O", "U"])
+    output = Dict("a"=>1, "e"=>1, "i"=>1, "o"=>1, "u"=>1)
     @test transform(input) == output
 end
 
 @testset "multiple scores with multiple letters" begin
-    input = [(1, ["A", "E"]), (2, ["D", "G"])]
-    output = [("a", 1), ("d", 2), ("e", 1), ("g", 2)]
+    input = Dict(1=>["A", "E"], 2=>["D", "G"])
+    output = Dict("g"=>2, "e"=>1, "a"=>1, "d"=>2)
     @test transform(input) == output
 end
 
 @testset "multiple scores with differing numbers of letters" begin
-    input = [(1, [ "A", "E", "I", "O", "U", "L", "N", "R", "S", "T" ]),
-             (2, [ "D", "G" ]), (3, [ "B", "C", "M", "P" ]),
-             (4, [ "F", "H", "V", "W", "Y" ]), (5, [ "K" ]),
-             (8, [ "J", "X" ]), (10, [ "Q", "Z" ])]
-    output = [("a", 1), ("b", 3),  ("c", 3), ("d", 2), ("e", 1),
-              ("f", 4), ("g", 2),  ("h", 4), ("i", 1), ("j", 8),
-              ("k", 5), ("l", 1),  ("m", 3), ("n", 1), ("o", 1),
-              ("p", 3), ("q", 10), ("r", 1), ("s", 1), ("t", 1),
-              ("u", 1), ("v", 4),  ("w", 4), ("x", 8), ("y", 4),
-              ("z", 10)]
+    input = Dict(1=>[ "A", "E", "I", "O", "U", "L", "N", "R", "S", "T" ],
+                 2=>[ "D", "G" ], 3=>[ "B", "C", "M", "P" ],
+                 4=>[ "F", "H", "V", "W", "Y" ], 5=>[ "K" ],
+                 8=>[ "J", "X" ], 10=>[ "Q", "Z" ])
+    output = Dict("a"=>1, "b"=>3,  "c"=>3, "d"=>2, "e"=>1,
+                  "f"=>4, "g"=>2,  "h"=>4, "i"=>1, "j"=>8,
+                  "k"=>5, "l"=>1,  "m"=>3, "n"=>1, "o"=>1,
+                  "p"=>3, "q"=>10, "r"=>1, "s"=>1, "t"=>1,
+                  "u"=>1, "v"=>4,  "w"=>4, "x"=>8, "y"=>4,
+                  "z"=>10)
     @test transform(input) == output
 end