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uVectorObject.pas
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160 lines (123 loc) · 3.56 KB
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unit uVectorObject;
// This source is distributed under Apache 2.0
// Copyright (C) 2019-2021 Herbert M Sauro
// Author Contact Information:
// email: hsauro@gmail.com
interface
uses SysUtils, Classes,
uMemoryManager,
uDataObjectMethods,
Generics.Collections,
uDataObject,
uRhodusTypes;
type
TVectorObject = class (TDataObject)
private
function getValue (index : Integer) : double;
procedure setValue (index : integer; value : double);
procedure setSize (value : integer);
public
data : TArray<Extended>;
constructor Create; overload;
constructor Create(Size: Integer); overload;
destructor Destroy; override;
class function add (v1, v2 : TVectorObject) : TVectorObject;
class function sub (v1, v2 : TVectorObject) : TVectorObject;
class function minus (v : TVectorObject) : TVectorObject;
function clone : TDataObject; override;
function getSize : integer; override;
function vectorToString: string;
property size : Integer read getSize write setSize;
property value[index : Integer] : double read getValue write setValue; default;
end;
implementation
Uses uVMExceptions;
const outOfRangeMsg = 'Index out of range while accessing vector element';
sameDimensionsMsg = 'Vectors must have the same dimensions';
// ----------------------------------------------------------------------
constructor TVectorObject.Create;
begin
inherited Create;
objectType := symVector;
//self.methods := arrayMethods;
end;
constructor TVectorObject.Create(Size: Integer);
begin
Create;
System.SetLength(data, Size)
end;
destructor TVectorObject.Destroy;
begin
data := nil;
inherited;
end;
function TVectorObject.clone : TDataObject;
begin
result := TVectorObject.Create;
(result as TVectorObject).data := self.data;
end;
function TVectorObject.getValue (index : Integer) : double;
begin
result := data[index] // 0-based array
end;
procedure TVectorObject.setValue (index : integer; value : double);
begin
data[index] := Value // 0-based array
end;
function TVectorObject.getSize : integer;
begin
result := length (data);
end;
procedure TVectorObject.setSize (value : integer);
begin
SetLength (data, value);
end;
cLass function TVectorObject.add (v1, v2 : TVectorObject) : TVectorObject;
var i : integer;
begin
if v1.size = v2.size then
begin
result := TVectorObject.Create(v1.size);
for i := 0 to v1.size - 1 do
result.data[i] := v1.data[i] + v2.data[i];
end
else
raise ERuntimeException.Create(sameDimensionsMsg);
end;
cLass function TVectorObject.sub (v1, v2 : TVectorObject) : TVectorObject;
var i : integer;
begin
if v1.size = v2.size then
begin
result := TVectorObject.Create(v1.size);
for i := 0 to v1.size - 1 do
result.data[i] := v1.data[i] - v2.data[i];
end
else
raise ERuntimeException.Create(sameDimensionsMsg);
end;
class function TVectorObject.minus (v : TVectorObject) : TVectorObject;
var i : integer;
begin
result := TVectorObject.Create(v.size);
for i := 0 to v.size - 1 do
result.data[i] := -v.data[i];
end;
function TVectorObject.vectorToString: string;
var i : integer;
formatStr : string;
begin
result := '{';
for i := 0 to self.size - 1 do
begin
if i = 0 then
formatStr := '%9.4f'
else
formatStr := '%10.4f';
result := result + Format(formatStr, [self.getValue(i)]);
if i < self.size - 1 then
result := result + ', ';
end;
result := result + '}';
end;
end.