How to resolve the algorithm String append step by step in the Delphi programming language

Published on 12 May 2024 09:40 PM
#Delphi

How to resolve the algorithm String append step by step in the Delphi programming language

Table of Contents

Problem Statement

Most languages provide a way to concatenate two string values, but some languages also provide a convenient way to append in-place to an existing string variable without referring to the variable twice.

Create a string variable equal to any text value. Append the string variable with another string literal in the most idiomatic way, without double reference if your language supports it. Show the contents of the variable after the append operation.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm String append step by step in the Delphi programming language

Source code in the delphi programming language

program String_append;

{$APPTYPE CONSOLE}

uses
  System.SysUtils;

type
  TStringHelper = record helper for string
    procedure Append(str: string);
  end;

{ TStringHelper }

procedure TStringHelper.Append(str: string);
begin
  Self := self + str;
end;

begin
  var h: string;

  // with + operator
  h := 'Hello';
  h := h + ' World';
  writeln(h);

  // with a function concat
  h := 'Hello';
  h := Concat(h, ' World');
  writeln(h);

  // with helper
  h := 'Hello';
  h.Append(' World');
  writeln(h);
  readln;
end.

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