Delphi6 functions collection (2)

Header function RightStr(const AText: string; const ACount: Integer): string; $[StrUtils.pas

Function returns the ACount characters on the right side of the string AText

Description RightStr('123456', 3) = '456'

Refer to function System.Copy

Example Edit3.Text := RightStr(Edit1.Text, SpinEdit1.Value);

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Header function MidStr(const AText: string; const AStart, ACount: Integer): string; $[StrUtils.pas

Function returns the string AText ACount characters starting from AStart

It means Copy

Refer to function System.Copy

Example Edit3.Text := MidStr(Edit1.Text, SpinEdit1.Value, SpinEdit2.Value);

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Header function SearchBuf(Buf: PChar; BufLen: Integer; SelStart, SelLength: Integer; SearchString: String; Options: TStringSearchOptions = [soDown]): PChar; $[StrUtils.pas

Function returns the first searched pointer position

Explain this function is often used to search strings in text

Reference <NULL>

example

//////////Begin SearchBuf

function SearchEdit(EditControl: TCustomEdit; const SearchString: String;

SearchOptions: TStringSearchOptions; FindFirst: Boolean = False): Boolean;

var

Buffer, P: PChar;

Size: Word;

Begin

Result := False;

if (Length(SearchString) = 0) then Exit;

Size := EditControl.GetTextLen;

if (Size = 0) then Exit;

Buffer := StrAlloc(Size + 1);

try

EditControl.GetTextBuf(Buffer, Size + 1);

P := SearchBuf(Buffer, Size, EditControl.SelStart, EditControl.SelLength,

SearchString, SearchOptions);

if P <> nil then begin

EditControl.SelStart := P - Buffer;

EditControl.SelLength := Length(SearchString);

Result := True;

end;

Finally

StrDispose(Buffer);

end;

end;

PRocedure TForm1.Button1Click(Sender: TObject);

var

SearchOptions: TStringSearchOptions;

Begin

SearchOptions := [];

if CheckBox1.Checked then

Include(SearchOptions, soDown);

if CheckBox2.Checked then

Include(SearchOptions, soMatchCase);

if CheckBox3.Checked then

Include(SearchOptions, soWholeWord);

SearchEdit(Memo1, Edit1.Text, SearchOptions);

Memo1.SetFocus;

end;

//////////End SearchBuf

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Header function Soundex(const AText: string; ALength: TSoundexLength = 4): string; $[StrUtils.pas

Function returns the detection string

Explanation: According to the detection method (Soundex), you can find the intersecting string; http://www.nara.gov/genealogy/coding.Html

Reference <NULL>

Example Edit2.Text := Soundex(Edit1.Text, SpinEdit1.Value);

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Header function SoundexInt(const AText: string; ALength: TSoundexIntLength = 4): Integer; $[StrUtils.pas

Function returns the detecting integer

It means that the greater the value of ALength, the higher the decoding accuracy

Reference <NULL>

Example SpinEdit2.Value := SoundexInt(Edit1.Text, SpinEdit1.Value);

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Header function DecodeSoundexInt(AValue: Integer): string; $[StrUtils.pas

Function returns the decoding of the probe integer

Description DecodeSoundexInt(SoundexInt('hello')) is equivalent to Soundex('hello')

Reference <NULL>

Example Edit2.Text := DecodeSoundexInt(SpinEdit2.Value);

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First function SoundexWord(const AText: string): Word; $[StrUtils.pas

Function returns the detecting text value

Indicates that there is no parameter ALength that has been fixed to 4

Reference <NULL>

Example SpinEdit2.Value := SoundexWord(Edit1.Text);

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First function DecodeSoundexWord(AValue: Word): string; $[StrUtils.pas

Function returns the decoding of the detecting text value

Description DecodeSoundexWord(SoundexWord('hello')) is equivalent to Soundex('hello')

Reference <NULL>

Example Edit2.Text := DecodeSoundexWord(SpinEdit2.Value);

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Header function SoundexSimilar(const AText, AOther: string; ALength: TSoundexLength = 4): Boolean; $[StrUtils.pas

Function returns whether the probe strings of the two strings are the same

Description Result := Soundex(AText, ALength) = Soundex(AOther, ALength)

Reference <NULL>

Example CheckBox1.Checked := SoundexSimilar(Edit1.Text, Edit2.Text, SpinEdit1.Value);

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Header function SoundexCompare(const AText, AOther: string; ALength: TSoundexLength = 4): Integer; $[StrUtils.pas

Function returns the result of comparing two strings to detect strings

Description Result := AnsiCompareStr(Soundex(AText, ALength), Soundex(AOther, ALength))

Reference function SysUtils.AnsiCompareStr

Example SpinEdit2.Value := SoundexCompare(Edit1.Text, Edit2.Text, SpinEdit1.Value);

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First function SoundeXProc(const AText, AOther: string): Boolean; $[StrUtils.pas

Function call SoundexSimilar to return the probe strings of the two strings.

Description of the default value of system variable AnsiResemblesProc

Reference function StrUtils.AnsiResemblesText

Example [var AnsiResemblesProc: TCompareTextProc = SoundexProc;]