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Task/Sorting-algorithms-Selection-sort/Ruby/sorting-algorithms-selection-sort.rb

@@ -0,0 +1,18 @@
+class Array
+  def selectionsort!
+    0.upto(length - 2) do |i|
+      (min_idx = i + 1).upto(length - 1) do |j|
+        if self[j] < self[min_idx]
+          min_idx = j
+        end
+      end
+      if self[i] > self[min_idx]
+        self[i], self[min_idx] = self[min_idx], self[i]
+      end
+    end
+    self
+  end
+end
+ary = [7,6,5,9,8,4,3,1,2,0]
+ary.selectionsort!
+# => [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]