Initial data commit

Task/Sort-stability/NetRexx/sort-stability.netrexx

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+/* NetRexx */
+options replace format comments java crossref savelog symbols nobinary
+
+class RCSortStability
+
+method main(args = String[]) public constant
+
+  cityList = [String "UK  London", "US  New York", "US  Birmingham", "UK  Birmingham"]
+
+  cn = String[cityList.length]
+
+  say
+  say "Before sort:"
+  System.arraycopy(cityList, 0, cn, 0, cityList.length)
+  loop city = 0 to cn.length - 1
+    say cn[city]
+    end city
+
+  cCompNm = Comparator CityComparator()
+  Arrays.sort(cn, cCompNm)
+
+  say
+  say "After sort on city:"
+  loop city = 0 to cn.length - 1
+    say cn[city]
+    end city
+
+  say
+  say "Before sort:"
+  System.arraycopy(cityList, 0, cn, 0, cityList.length)
+  loop city = 0 to cn.length - 1
+    say cn[city]
+    end city
+
+  cCompCtry = Comparator CountryComparator()
+  Arrays.sort(cn, cCompCtry)
+
+  say
+  say "After sort on country:"
+  loop city = 0 to cn.length - 1
+    say cn[city]
+    end city
+  say
+
+  return
+
+class RCSortStability.CityComparator implements Comparator
+
+method compare(lft = Object, rgt = Object) public binary returns int
+  return (String lft).substring(4).compareTo((String rgt).substring(4))
+
+class RCSortStability.CountryComparator implements Comparator
+
+method compare(lft = Object, rgt = Object) public binary returns int
+  return (String lft).substring(0, 2).compareTo((String rgt).substring(0, 2))