Petite "base de donnée" en accès direct.

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Description

Cette classe permet de creer/modifier une base de donnée. elle n'as de grand intêret vu qu'elle est destinée à faire exactement la même chose qu'une base de donnée classique mais elle monntre bien l'utilisation des tableau, redimensionnement, des fichiers à accès direct, la fonction TextWidth, InStr, .......

Source / Exemple :


'******************************************************************************************
'******************************************************************************************
'
' Classe créée par sibi14 : sibi14@skynet.be
'                           users.skynet.be/sibi14
'
' Classe permettant de gerer une base de donnée
'
' Propriété :
'
' Additem            : Permet d'ajouter une entrée
'
' Changed            : Indique si la base de donnée a été modifié
'                      depuis la dernière sauvegarde
'
' Clear              : Vide la base de donnée
'
' Count              : Indique le nombre d'entrée dans la base de donnée
'
' DB                 : Permet de lire/écrire dans la base de donnée
'
' DefineColumn       : Définit le nom des colonnes
'
' List               : Rafraichit la liste associé à la base de donnée
'
' ListBox            : Affecte/lit le ListBox attribué à la base de donnée
'
' ListFormat         : Définit/lit le format d'affichage dans la base de
'                      donnée.Usage:
'
'                            - %n : Signifie que l'élément de la Nème colonne
'                                  est afficher ici
'
'                            - %r : Signifie que le reste de la ligne est aligner
'                                  à droite
'
'                            - %% : Affiche le caractère "%"
'
' NumberOfColumn     :
'
' OpenFile           :
'
' RemoveItem         :
'
' SaveFile           :
'
' SearchColumnNumber :
'
' SearchLine         :
'
' SearchListIndex    :
'
' TypeOfColumn       :
'
' TypeOfColumnNumber :
'
'******************************************************************************************
'******************************************************************************************
Enum Search
  Faux = -&H1
  Column1 = &H0
  Column2 = &H1
  Column3 = &H2
  Column4 = &H3
  Column5 = &H4
  Column6 = &H5
  Column7 = &H6
  Column8 = &H7
  Column9 = &H8
  Column10 = &H9
  Column11 = &HA
  Column12 = &HB
  Column13 = &HC
  Column14 = &HD
  Column15 = &HE
  Column16 = &HF
  FormatList = &H1000
End Enum
Dim FileName As String
Dim DBSibi() As Variant
Dim Vide As Boolean
Dim Nom() As String
Dim TID() As VbVarType
Public Changed As Boolean
Public Count As Long
Event Format(Valeur As String, ByVal Index As Long)
Event Vide()
Event PlusVide()
Event Change(ByVal Column As Integer, ByVal Line As Integer, ByRef Valeur As Variant)
'variables locales de stockage des valeurs de propriétés
Private mvarListBox As Object 'copie locale
'variables locales de stockage des valeurs de propriétés
Private mvarListFormat As String 'copie locale
Public Property Let ListFormat(ByVal vData As String)
'utilisé lors de l'affectation d'une valeur à la propriété, du coté gauche de l'affectation.
'Syntax: X.ListFormat = 5
    mvarListFormat = vData
    If Trim(mvarListFormat) = "" Then mvarListFormat = "%1"
    List
End Property

Public Property Get ListFormat() As String
'utilisé lors de la lecture de la valeur de la propriété, du coté droit de l'instruction.
'Syntax: Debug.Print X.ListFormat
    ListFormat = mvarListFormat
End Property

Public Property Let ListBox(ByVal vData As Object)
'utilisé lors de l'affectation d'une valeur à la propriété, du coté gauche de l'affectation.
'Syntax: X.ListBox = 5
    mvarListBox = vData
    List
End Property

Public Property Set ListBox(ByVal vData As Object)
'utilisé lors de l'affectation d'un Object à la propriété, du coté gauche de l'instruction Set
'Syntax: Set x.ListBox = Form1
    Set mvarListBox = vData
    List
End Property

Public Property Get NumberOfColumn() As Integer
'utilisé lors de la lecture de la valeur de la propriété, du coté droit de l'instruction.
'Syntax: Debug.Print X.ListBox
    NumberOfColumn = UBound(DBSibi, 1) + 1
    'List
End Property

Public Property Get ListBox() As Object
'utilisé lors de la lecture de la valeur de la propriété, du coté droit de l'instruction.
'Syntax: Debug.Print X.ListBox
    If IsObject(mvarListBox) Then
        Set ListBox = mvarListBox
    Else
        ListBox = mvarListBox
    End If
    'List
End Property

Property Get Db(ByVal Column As Variant, Optional ByVal Line As Variant, Optional ByVal Search As Search = Faux)
If IsNumeric(Column) Then
  x = Column - 1
  If x < LBound(DBSibi, 1) Then x = LBound(DBSibi, 1)
  If x > UBound(DBSibi, 1) Then x = UBound(DBSibi, 1)
Else
  x = SearchColumnNumber(CStr(Column)) - 1
End If
If x = -1 Then Exit Property
y = 0
If Search > -1 Then
  y = SearchLine(Line, Search)
ElseIf IsMissing(Line) Then
  If mvarListBox Is Nothing Then Exit Property
  If mvarListBox.Sorted Then
    y = SearchLine(mvarListBox.Text, FormatList)
  Else
    y = mvarListBox.ListIndex + 1
  End If
  If y < LBound(DBSibi, 2) Then y = LBound(DBSibi, 2)
  If y > UBound(DBSibi, 2) Then y = UBound(DBSibi, 2)
ElseIf IsNumeric(Line) Then
  y = Line
  If y < LBound(DBSibi, 2) Then y = LBound(DBSibi, 2)
  If y > UBound(DBSibi, 2) Then y = UBound(DBSibi, 2)
End If
If y = 0 Then Exit Property
On Error Resume Next
Db = Convert(DBSibi(x, y), TID(x))
End Property

Property Let Db(ByVal Column As Variant, Optional ByVal Line As Variant, Optional ByVal Search As Search = Faux, Valeur As Variant)
Dim x As Long, y As Long
Dim ListIndex As Integer
If IsNumeric(Column) Then
  x = Column - 1
  If x < LBound(DBSibi, 1) Then x = LBound(DBSibi, 1)
  If x > UBound(DBSibi, 1) Then x = UBound(DBSibi, 1)
Else
  x = SearchColumnNumber(CStr(Column)) - 1
End If
If x = -1 Then Exit Property
y = 0
If Search > -1 Then
  y = SearchLine(Line, Search)
ElseIf IsMissing(Line) Then
  If mvarListBox Is Nothing Then Exit Property
  If mvarListBox.Sorted Then
    y = SearchLine(mvarListBox.Text, FormatList)
  Else
    y = mvarListBox.ListIndex + 1
  End If
  If y < LBound(DBSibi, 2) Then y = LBound(DBSibi, 2)
  If y > UBound(DBSibi, 2) Then y = UBound(DBSibi, 2)
ElseIf IsNumeric(Line) Then
  y = Line
  If y < LBound(DBSibi, 2) Then y = LBound(DBSibi, 2)
  If y > UBound(DBSibi, 2) Then y = UBound(DBSibi, 2)
End If
If y = 0 Then Exit Property
On Error Resume Next
'If DBSibi(X, Y) <> Convert(Valeur, TID(X)) Then
  Changed = True
'End If
  ListIndex = SearchListIndex(y)
  DBSibi(x, y) = Convert(Valeur, TID(x))
  RaiseEvent Change(x + 1, y, DBSibi(x, y))
  List y, ListIndex
End Property

Public Sub OpenFile(Optional FName As String)
  If Not FName = "" Then FileName = FName
  Dim a()
  'ReDim a(0 To NbreColonne)
  If Dir(FileName) = "" Then GoTo Error
  On Error GoTo Error
  Frf = FreeFile
  Open FileName For Random As #Frf 'Len = 40 * UBound(DBSibi)
    Get #Frf, 1, Nom()
  Close #Frf
  Open FileName For Random As #Frf Len = 40 * UBound(Nom)
    Get #Frf, 1, Nom()
    Get #Frf, 2, TID()
    ReDim DBSibi(0 To 0, 1 To 1)
    Do Until LOF(Frf) <= (Loc(Frf)) * 40 * UBound(Nom) Or EOF(Frf)
      j = j + 1
      Get #Frf, 2 + j, a()
      If UBound(a, 1) = UBound(DBSibi, 1) Then ReDim Preserve DBSibi(0 To UBound(a, 1), 1 To j) Else ReDim DBSibi(0 To UBound(a, 1), 1 To j)
      For i = 0 To UBound(a, 1)
        DBSibi(i, j) = a(i)
      Next i
    Loop
  Close #Frf
  Changed = False
  Vide = (UBound(DBSibi, 2) = 0)
  Count = UBound(DBSibi, 2)
  List
  Exit Sub
Error:
  Close #1
  Class_Initialize
  List
  'If UBound(DBSibi, 2) = 0 Then Vide = False Else Vide = True
End Sub

Public Sub SaveFile(Optional FName As String)
  If Not FName = "" Then FileName = FName
  If Dir(FileName) <> "" Then Kill FileName
  fr = FreeFile
  Dim a() As Variant
  ReDim a(0 To UBound(DBSibi, 1)) As Variant
  Open FileName For Random As #fr Len = 40 * UBound(DBSibi, 1)
    Put #fr, 1, Nom()
    Put #fr, 2, TID()
    For i = 1 To UBound(DBSibi, 2)
      For j = 0 To UBound(DBSibi, 1)
        a(j) = Convert(DBSibi(j, i), TID(j))
      Next j
      Put #fr, i + 2, a()
    Next i
  Close #fr
  Changed = False
End Sub

Public Sub DefineColumn(ParamArray Name() As Variant)
a = UBound(Name, 1)
If a <> UBound(DBSibi, 1) Then
  ReDim DBSibi(0 To a, 1 To UBound(DBSibi, 2))
End If
If a <> UBound(Nom, 1) Then
  ReDim Nom(0 To a)
End If
If a <> UBound(TID, 1) Then
  ReDim Preserve TID(0 To a)
End If
For i = 0 To a
  Nom(i) = Name(i)
  If TID(i) = 0 Then TID(i) = vbVariant
Next i
List
End Sub

Public Sub TypeOfColumn(ParamArray TypeID() As Variant)
a = UBound(TypeID, 1)
If a <> UBound(DBSibi, 1) Then
  ReDim DBSibi(0 To a, 1 To UBound(DBSibi, 2))
End If
If a <> UBound(Nom, 1) Then
  ReDim Preserve Nom(0 To a)
End If
If a <> UBound(TID, 1) Then
  ReDim TID(0 To a)
End If
For i = 0 To a
  TID(i) = TypeID(i)
  If TID(i) = 0 Then TID(i) = vbVariant
Next i
List
End Sub

Public Sub Clear()
ReDim DBSibi(0 To UBound(DBSibi, 1), 1 To 1)
Count = 0
Vide = True
List
RaiseEvent Vide
End Sub

Public Sub RemoveItem(Optional Index As Long)
If Vide Then Exit Sub
If UBound(DBSibi, 2) = 1 Then Clear: Exit Sub
If Index = 0 Then
  If mvarListBox Is Nothing Then Exit Sub
  Index = SearchLine(mvarListBox.Text, FormatList)
  ListIndex = mvarListBox.ListIndex
  If Index = -1 Then Exit Sub
End If
If Index < LBound(DBSibi, 2) Then Index = LBound(DBSibi, 2)
If Index > UBound(DBSibi, 2) Then Index = UBound(DBSibi, 2)
For i = Index + 1 To UBound(DBSibi, 2)
  For j = 0 To UBound(DBSibi, 1)
    DBSibi(j, i - 1) = DBSibi(j, i)
  Next j
Next i
If UBound(DBSibi, 2) - 1 = 0 Then Vide = True: ReDim Preserve DBSibi(0 To UBound(DBSibi, 1), 1 To UBound(DBSibi, 2)) Else ReDim Preserve DBSibi(0 To UBound(DBSibi, 1), 1 To (UBound(DBSibi, 2) - 1))
Count = UBound(DBSibi, 2)
If mvarListBox Is Nothing Then Exit Sub
mvarListBox.RemoveItem CInt(ListIndex)
End Sub

Public Sub AddItem(ParamArray Valeur() As Variant)
If UBound(Valeur) >= LBound(Valeur) Then tmp = Valeur(0) Else tmp = ""
a = SearchLine(tmp, Column1)
If a = -1 Then GoTo suite
For i = 1 To UBound(DBSibi, 1)
  If i > 0 Then If DBSibi(i, a) <> Valeur(i) And a <> "" Then GoTo suite
Next i
Exit Sub
suite:
If Vide = False Then
  ReDim Preserve DBSibi(0 To UBound(DBSibi, 1), 1 To UBound(DBSibi, 2) + 1)
Else
  RaiseEvent PlusVide
End If
For i = 0 To UBound(DBSibi, 1)
  If i >= LBound(Valeur, 1) And i <= UBound(Valeur, 1) Then DBSibi(i, UBound(DBSibi, 2)) = Convert(Valeur(i), TID(i))
Next i
Count = UBound(DBSibi, 2)
Vide = False
If mvarListBox Is Nothing Then Exit Sub
mvarListBox.AddItem "", mvarListBox.ListCount
List Count, mvarListBox.ListCount - 1
mvarListBox.Refresh
mvarListBox.ListIndex = mvarListBox.ListCount - 1
End Sub

Private Sub List(Optional Line As Long = -1, Optional ListIndex As Integer = -1)
Attribute List.VB_UserMemId = 0
Dim Valeur As String
If mvarListBox Is Nothing Then Exit Sub
'If mvarListBox.Container.ActiveControl Is mvarListBox Then b = True
'mvarListBox.Visible = False
If Line = -1 Then
  a = mvarListBox.ListIndex
  If Count = 0 Then a = 0
  mvarListBox.Clear
  If Vide Then GoTo suite
  Set frm.Font = mvarListBox.Font
  For i = 1 To UBound(DBSibi, 2)
    tmp = False
    Item = ""
    c = 1
boucle:
    Texte = InStr(c, mvarListFormat, "%")
    If Texte = 0 Then Item = Item & Right(mvarListFormat, Len(mvarListFormat) - c + 1): GoTo FinBoucle
    If Texte <> c Then Item = Item & Mid(mvarListFormat, c, Texte - c)
    If Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1) = "%" Then
      Item = Item & "%"
    ElseIf UBound(DBSibi, 1) >= Val(Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1)) - 1 And Val(Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1)) > 0 Then
      If TID(Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1) - 1) = vbDate Then
        Item = Item & Strings.Format(DBSibi(Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1) - 1, i), "dd/mm/yy")
      Else
        Item = Item & DBSibi(Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1) - 1, i)
      End If
    ElseIf Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1) = "r" Then
      tmp = True
      ItemG = Item
      Item = ""
    Else
      Valeur = Mid(mvarListFormat, InStr(c, mvarListFormat, "%"), 2)
      RaiseEvent Format(Valeur, i)
      Item = Item & Valeur
    End If
    c = InStr(c, mvarListFormat, "%") + 2
    GoTo boucle
FinBoucle:
    If tmp Then Item = ItemG & Space(((mvarListBox.Width - frm.TextWidth(ItemG & Item) - 400) + Abs(mvarListBox.Width - frm.TextWidth(ItemG & Item) - 400)) / 2 / frm.TextWidth(" ")) & Item
    'Call RemoveItem(162)
    mvarListBox.AddItem Item & " "
  Next i
  If UBound(DBSibi, 2) - 1 < a Then a = UBound(DBSibi, 2) - 1
  If UBound(DBSibi, 2) <> 0 Then mvarListBox.ListIndex = a
suite:
Else
  i = Line
  tmp = False
  Item = ""
  c = 1
Boucle2:
  Texte = InStr(c, mvarListFormat, "%")
  If Texte = 0 Then Item = Item & Right(mvarListFormat, Len(mvarListFormat) - c + 1): GoTo FinBoucle2
  If Texte <> c Then Item = Item & Mid(mvarListFormat, c, Texte - c)
  If Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1) = "%" Then
    Item = Item & "%"
  ElseIf UBound(DBSibi, 1) >= Val(Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1)) - 1 And Val(Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1)) > 0 Then
    If TID(Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1) - 1) = vbDate Then
      Item = Item & Strings.Format(DBSibi(Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1) - 1, i), "dd/mm/yy")
    Else
      Item = Item & DBSibi(Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1) - 1, i)
    End If
  ElseIf Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1) = "r" Then
    tmp = True
    ItemG = Item
    Item = ""
  Else
    Valeur = Mid(mvarListFormat, InStr(c, mvarListFormat, "%"), 2)
    RaiseEvent Format(Valeur, i)
    Item = Item & Valeur
  End If
  c = InStr(c, mvarListFormat, "%") + 2
  GoTo Boucle2
FinBoucle2:
  If tmp Then Item = ItemG & Space(((mvarListBox.Width - frm.TextWidth(ItemG & Item) - 400) + Abs(mvarListBox.Width - frm.TextWidth(ItemG & Item) - 400)) / 2 / frm.TextWidth(" ")) & Item
  'mvarListBox.ListIndex = -1
  If ListIndex = -1 Then ListIndex = SearchListIndex(Line)
  mvarListBox.List(ListIndex) = Item & " "
  'mvarListBox.ListIndex = i - 1
End If
'mvarListBox.Visible = True
'If b = True Then mvarListBox.SetFocus
End Sub

Private Sub Class_Initialize()
Changed = False
ReDim DBSibi(0 To 0, 1 To 1)
ReDim Nom(0)
ReDim TID(0)
mvarListFormat = "%1"
Count = 0
Vide = True
End Sub

Private Function Convert(Var As Variant, TypeID As VbVarType)
        If IsMissing(Var) Then Exit Function
        Select Case TypeID
          Case vbString
            a = CStr(Var)
          Case vbInteger
            If Var = "" Then Var = "0"
            a = CInt(Val(Var))
          Case vbBoolean
            a = CBool(Var)
          Case vbByte
            If Var = "" Then Var = "0"
            a = CByte(Val(Var))
          Case vbCurrency
            If Var = "" Then Var = "0"
            a = CCur(Var)
          Case vbDate
            a = CDate(Var)
          Case vbDouble
            If Var = "" Then Var = "0"
            a = CDbl(Var)
          Case vbDecimal
            If Var = "" Then Var = 0
            If InStr(1, Var, ".") <> 0 Then Mid(Var, InStr(1, Var, "."), 1) = ","
            a = CDec(Var)
          Case vbLong
            If Var = "" Then Var = "0"
            a = CLng(Val(Var))
          Case vbSingle
            If Var = "" Then Var = "0"
            a = CSng(Var)
          Case Else
            a = CVar(Var)
        End Select
        Convert = a
End Function

Public Function Column(ByVal n As Long) As String
Column = Nom(n - 1)
End Function

Public Function TypeOfColumnNumber(ByVal n As Integer) As VbVarType
On Error Resume Next
TypeOfColumnNumber = -1
TypeOfColumnNumber = TID(n - 1)
End Function

Public Function SearchLine(Valeur As Variant, Search As Search) As Integer
Dim Text As String
y = -1
If Search = FormatList Then
  If Vide Then GoTo suite
  For i = 1 To UBound(DBSibi, 2)
    tmp = False
    Item = ""
    c = 1
boucle:
    Texte = InStr(c, mvarListFormat, "%")
    If Texte = 0 Then Item = Item & Right(mvarListFormat, Len(mvarListFormat) - c + 1): GoTo FinBoucle
    If Texte <> c Then Item = Item & Mid(mvarListFormat, c, Texte - c)
    If Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1) = "%" Then
      Item = Item & "%"
    ElseIf UBound(DBSibi, 1) >= Val(Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1)) - 1 And Val(Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1)) > 0 Then
      Item = Item & DBSibi(Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1) - 1, i)
    ElseIf Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1) = "r" Then
      tmp = True
      ItemG = Item
      Item = ""
    Else
      Text = Mid(mvarListFormat, InStr(c, mvarListFormat, "%"), 2)
      RaiseEvent Format(Text, i)
      Item = Item & Text
    End If
    c = InStr(c, mvarListFormat, "%") + 2
    GoTo boucle
FinBoucle:
    If tmp Then Item = ItemG & Space(((mvarListBox.Width - frm.TextWidth(ItemG & Item) - 400) + Abs(mvarListBox.Width - frm.TextWidth(ItemG & Item) - 400)) / 2 / frm.TextWidth(" ")) & Item
    If Trim(Item) = Trim(Valeur) Then y = i: GoTo suite
  Next i
suite:
  
ElseIf Search > -1 And Valeur <> "" Then
  For i = 1 To UBound(DBSibi, 2)
    If DBSibi(Search, i) = Valeur Then y = i: Exit For
  Next i
Else
  y = -1
End If
SearchLine = y
End Function

Function SearchListIndex(Valeur As Long)
If mvarListBox.Sorted = False Then SearchListIndex = Valeur - 1: Exit Function
Dim Text As String
y = -1
If Vide Then GoTo suite
  i = Valeur
  tmp = False
  Item = ""
  c = 1
boucle:
  Texte = InStr(c, mvarListFormat, "%")
  If Texte = 0 Then Item = Item & Right(mvarListFormat, Len(mvarListFormat) - c + 1): GoTo FinBoucle
  If Texte <> c Then Item = Item & Mid(mvarListFormat, c, Texte - c)
  If Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1) = "%" Then
    Item = Item & "%"
  ElseIf UBound(DBSibi, 1) >= Val(Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1)) - 1 And Val(Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1)) > 0 Then
    Item = Item & DBSibi(Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1) - 1, i)
  ElseIf Mid(mvarListFormat, InStr(c, mvarListFormat, "%") + 1, 1) = "r" Then
    tmp = True
    ItemG = Item
    Item = ""
  Else
    Text = Mid(mvarListFormat, InStr(c, mvarListFormat, "%"), 2)
    RaiseEvent Format(Text, i)
    Item = Item & Text
  End If
  c = InStr(c, mvarListFormat, "%") + 2
  GoTo boucle
FinBoucle:
  If tmp Then Item = ItemG & Space(((mvarListBox.Width - frm.TextWidth(ItemG & Item) - 400) + Abs(mvarListBox.Width - frm.TextWidth(ItemG & Item) - 400)) / 2 / frm.TextWidth(" ")) & Item
For i = 1 To UBound(DBSibi, 2)
  If Trim(Item) = Trim(mvarListBox.List(i - 1)) Then y = i - 1: GoTo suite
Next i
suite:

SearchListIndex = y
End Function

Function SearchColumnNumber(Column As String) As Integer
  x = -1
  For i = 0 To UBound(Nom, 1)
    If Nom(i) = Column Then x = i + 1: Exit For
  Next i
  SearchColumnNumber = x
End Function

Conclusion :


Je met cette source à des fins didactique merci de pas voir la dedans quelque chose senser révolutionner le monde donc inutile de mettre des commentaire pour critiquer ou de mettre des notes style 1 ou 2

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