flickr.lib.integerlist.pas

// Copyright (c) 2015, Jordi Corbilla
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// - Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// - Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// - Neither the name of this library nor the names of its contributors may be
// used to endorse or promote products derived from this software without
// specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.

unit flickr.lib.integerlist;

interface

uses

  Contnrs, Generics.Collections;

type
  TIntegerList = class(TList<integer>)
    function Total() : integer;
    function TotalSquared() : integer;
    function Squared() : integer;
  end;
implementation

{ TIntegerList }

function TIntegerList.Squared: integer;
var
  i: Integer;
  total : integer;
begin
  total := 0;
  for i := 0 to self.Count-1 do
  begin
    total := total + (self[i]*self[i]);
  end;
  result := total;
end;

function TIntegerList.Total: integer;
var
  i: Integer;
  total : integer;
begin
  total := 0;
  for i := 0 to self.Count-1 do
  begin
    total := total + self[i];
  end;
  result := total;
end;

function TIntegerList.TotalSquared: integer;
var
  tot : integer;
begin
  tot := Total();
  result := (tot)*(tot);
end;

end.