Author: Dmitri Papichev

How I convert boolean values to the words depending on the situation? For example, 
TRUE here means "Enabled", and FALSE there means "Failed"?

Answer:

Solve 1:

Here is the code snippet to do the job. If the second parameter is omitted, the 
function returns "TRUE" or "FALSE". 
Modify the function declaration to change the default returning values. Expand 
TBooleanWordType and BooleanWord definitions to include more specific values if 
needed. 

1   interface
2   {...}
3   type
4     TBooleanWordType =
5       (bwTrue, bwYes, bwOn, bwEnabled, bwSuccessful, bwOK, bwOne);
6     {...}
7   function BoolToStr(AValue: boolean;
8     ABooleanWordType: TBooleanWordType = bwTrue): string;
9   {...}
10    {=====================================================}
11  implementation
12  {...}
13  const
14    BooleanWord: array[boolean, TBooleanWordType] of string =
15    (
16      ('FALSE', 'No', 'Off', 'Disabled', 'Failed', 'Cancel', '0'),
17      ('TRUE', 'Yes', 'On', 'Enabled', 'Successful', 'OK', '1')
18      );
19  
20    {...}
21      {-----------------------------------------------------}
22  
23  function BoolToStr(AValue: boolean;
24    ABooleanWordType: TBooleanWordType = bwTrue): string;
25  begin
26    Result := BooleanWord[AValue, ABooleanWordType];
27  end; {--BoolToStr--}
28  {...}


Solve 2:

29  interface
30  
31  function BoolToStr(b: boolean; TrueValue: string = '1'; FalseValue: string = '0'):
32    string; overload;
33  
34  implementation
35  
36  function BoolToStr(b: boolean; TrueValue: string = '1'; FalseValue: string = '0'):
37    string; overload;
38  begin
39    if b then
40      Result := TrueValue
41    else
42      Result := FalseValue,
43  end;
44  
45  // example for italian language
46  s := BoolToStr(CheckBox1.Checked, 'Si', 'No');


Add this overloaded Function to the unit. 


Solve 3:

47  const
48    arrBooleanValues: array[Boolean] of ShortString = ('False', 'True');
49  var
50    b: Boolean;
51    s: string;
52  begin
53    b := False;
54    s := arrBooleanValues[b]; // 'False'
55    b := True;
56    s := arrBooleanValues[b]; // 'True'
57  end;