June 2018 Update

Task/Sort-an-array-of-composite-structures/Julia/sort-an-array-of-composite-structures.julia

@@ -1,38 +1,17 @@
-type Pair{T<:String}
-    name::T
-    value::T
-end
+lst = Pair[Pair("gold", "shiny"),
+           Pair("neon", "inert"),
+           Pair("sulphur", "yellow"),
+           Pair("iron", "magnetic"),
+           Pair("zebra", "striped"),
+           Pair("star", "brilliant"),
+           Pair("apple", "tasty"),
+           Pair("ruby", "red"),
+           Pair("dice", "random"),
+           Pair("coffee", "stimulating"),
+           Pair("book", "interesting")]
 
-Base.show(a::Pair) = @sprintf "%s => %s" a.name a.value
-
-x = Pair[Pair("gold", "shiny"),
-         Pair("neon", "inert"),
-         Pair("sulphur", "yellow"),
-         Pair("iron", "magnetic"),
-         Pair("zebra", "striped"),
-         Pair("star", "brilliant"),
-         Pair("apple", "tasty"),
-         Pair("ruby", "red"),
-         Pair("dice", "random"),
-         Pair("coffee", "stimulating"),
-         Pair("book", "interesting")]
-
-
-println("x, the original list of pairs: ")
-for p in x
-    println("    ", show(p))
-end
-
-println()
-println("x sorted by name:")
-x = sort(x, by=a->a.name)
-for p in x
-    println("    ", show(p))
-end
-
-println()
-println("x sorted by value:")
-x = sort(x, by=a->a.value)
-for p in x
-    println("    ", show(p))
-end
+println("The original list: \n - ", join(lst, "\n - "))
+sort!(lst; by=first)
+println("\nThe list, sorted by name: \n - ", join(lst, "\n - "))
+sort!(lst; by=last)
+println("\nThe list, sorted by value: \n - ", join(lst, "\n - "))