Julia samples (#108)

* Add julialang binary search sample

* Add unit test

* Add julialang selection sort sample

* Change julia suffix to jl

* Add recursion and quick sort with tests

* add quick sort

* Add hash table samples

* Add BFS

* Changed file names

* Add dijkstras

* Add Dijkstras test

02_selection_sort/julia/01_selection_sort.jl

@@ -0,0 +1,26 @@
+using Test
+
+function find_smallest(arr)
+    smallest = arr[1]
+    smallest_index = 1
+    for i = 1:length(arr)
+        if arr[i] < smallest
+            smallest = arr[i]
+            smallest_index = i
+        end
+    end
+    return smallest_index
+end
+
+function selection_sort(arr)
+    new_arr = Array{Int64}(undef,0)
+    for i = 1:length(arr)
+        smallest = find_smallest(arr)
+        append!(new_arr,arr[smallest])
+        deleteat!(arr,smallest)
+    end
+    return new_arr
+end
+
+arr = [5,3,6,2,10]
+@test selection_sort(arr) == [2,3,5,6,10]