重定义 redim 对于动态数组，能够重定义，重定义之后也能够继续重定义；不能对静态数组进行重定义。...redim arr2(1) ‘错误发生。 redim arr3(-1) ‘正确，能够设置为 -1，以表示这个数组长度为 0。 如上重定义数组将导致该数组原有赋值丢失。...重定义 redim preserve 前面讲到重定义数组将导致该数组原有赋值丢失，怎么能保证不丢失呢？用 redim preserve。...dim arr() redim arr(1) arr(0) = “1” alert(arr(0)) ‘显示 1 redim preserve arr(2) alert(...redim 上限为 -1，但不能为其它负数，比方 -2 就会报“内存不够”。
比如： dim 数组名称() 然后在程序过程中使用ReDim语句重新定义该数组的大小。...具体完整语句如下： ReDim [Preserve] 数组名（下界 to 上界） [ as 数据类型 ] 使用ReDim语句可以反复改变数组的大小和维度，但不能用ReDim语句更改已经声明的数据类型，...即Redim 数组名（下标）[as 数据类型]。 下面通过几个简单的示例演示下： 首先定义Arr1为动态数组，变量i和变量j为整形变量。通过ReDim语句重新定义Arr1为一维的1到3的数组。...然后用ReDim语句再次重新定义Arr1数组大小，此时在立即窗口中显示Arr1(2)元素，已经没有值了。...（注意使用Preserve关键字，如果ReDim重新定义最后一维的范围变小，多余的元素也是会消失的。）
Error Resume Next Dim arrayA() Dim size Dim over size = &h5 over = &h8000000 + size Redim...Preserve arrayA(size) Redim Preserve arrayA(over) arrayA(size+1) = "Hello"</html...第一部分： function BeginInit() Randomize() redim aa(5) redim ab(5) a0=13+17*rnd(6) a3=7+3*...Preserve aa(a0) redim ab(a0) redim Preserve aa(a2) type1=1 ab(0)=1.123456789012345678901234567890...Preserve aa(a2) aa(a1+2)(i+&h11c+k)=ab(4) redim Preserve aa
可使用ReDim语句来重新定义数组的大小。...例如，此时知道需要大小为10的数组，可以重新定义数组： ReDim arr(9) 如果觉得需要的数组大小为20，则再重新定义数组： ReDim arr(19) 也可以使用ReDim声明一个动态数组并指定数组的大小...： ReDim arr(6) As Long 注意，虽然可以使用ReDim方便地改变一个动态数组的大小，但每次在重新定义数组大小时，原来存储在数组中的数据会丢失。...例如： ReDim Preserve arr(9) 其实，ReDim的作用是创建一个新数组，而Preserve的作用则是把原数组中的数据复制到新数组中。...Dim arr() As Long Dim i As Long For i = 0 To 10 ReDim Preserve arr(i) arr(i) = i * i Nexti 获取数组的下限和上限
有的小伙伴很快就想到了思路，首先定义一个动态数组arr，然后从1到100开始循环遍历，当数字循环到2和3的公倍数时，ReDim该数组的长度为y，并把当前数字添加进数组，y自增加1，再循环到符合条件的数字时...，再ReDim该数组的长度为y,再把当前数字添加进数组，依次循环到100，循环结束后，通过arr(索引)就得到了结果。...于是，我们在循环中重定义数组的代码中加上ReDim的参数Preserve，它的意思就是当arr是一个动态数组，用ReDim Preserve重定义arr修改长度时，不清空之前数组中的元素（Redim 不能重定义静态数组的长度...我们再试一下，如下图： image.png image.png image.png image.png 如果在ReDim中使用了Preserve可选参数，只能调整数组最后维的大小，并且不能改变数组的维数...用ReDim Preserve重定义数组长度时，该数组在声明时必须是动态数组，即Dim arr()，不能声明成Variant类型（即不能Dim arr或者Dim arr as Variant），否则都会报错
Dim rng As Range '需要插入的列对应的Fields的下表 Dim colInsert() As Long, colInsertName() As String ReDim...colInsert(UBound(srcArr, 2) - 1) As Long ReDim colInsertName(UBound(srcArr, 2) - 1) As String...As Long Dim kColUpdate As Long For Each rng In rngs If rng.Row = 1 Then ReDim...As Variant srcArr = rngsrc.Value Dim i As Long, j As Long Dim sqlcmd As String ReDim...sqlwhere(UBound(colswhere)) As String Dim updatefield() As String ReDim updatefield(kColUpdate
UBound(arr, 2) If Err.Number 0 Then sortMode = 1 '不是二维数组 If hasHeaders Then ReDim...tmp(LBound(arr) To UBound(arr) - 1) ReDim head(1 To 1) For i = LBound(arr) To UBound(arr...tmp(LBound(arr) To (UBound(arr) - 1), LBound(arr, 2) To UBound(arr, 2)) ReDim head(1 To 1, LBound...arr1(LBound(arr) To mid - IIf(LBound(arr) = 0, 1, 0)) ReDim arr2(LBound(arr) To UBound(arr) - mid...arr1(LBound(arr) To mid - IIf(LBound(arr) = 0, 1, 0), LBound(arr, 2) To UBound(arr, 2)) ReDim arr2
Any) As Long VarPtrArray 返回的并不是SafeArray的地址，我们可以进行测试： Sub TestArray() Dim Arr() As Byte ReDim...Sub TestArray() Dim Arr() As Byte ReDim Arr(3) As Byte Dim ptr As Long '保存[Arr指针]的地址...进一步测试，从pvDataas 中提取数据，看看获取的数据是否能正确： Sub TestArray2() Dim Arr() As Byte ReDim Arr(3) As Byte...3、ReDim Preserve做了什么 我们经常会用ReDim Preserve来改变数组的容量，当然一般都是扩大。...扩大的话要更多的内存空间来保存数据，所以应该是要重新分配内存，测试： Sub TestArray() Dim Arr() As Byte ReDim Arr(3) As Byte
{ int[] arr = new int[]{1,2,3}; PrintArr(arr); arr = (int[])Redim...(arr,5); PrintArr (arr); arr = (int[]) Redim (arr, 2); PrintArr (arr);...) public static Array Redim (Array origArray, int desiredSize) { //determine the type
Worksheets(shtName) crr = .Range(dataRng) title_arr = Application.Index(crr, 1, 0) ReDim...karr(UBound(arr, 2) - 2) ReDim darr(UBound(brr, 2) - 2) m = 0 For j = 0 To UBound..., dilimi As String, aCount% delimi = "|" Set t_d = CreateObject("scripting.dictionary") ReDim...Then m = m + 1 t_d(s) = m End If Next i aCount = t_d.Count ReDim...mydata_arr(n, j) = mydata_arr(n, j) + data_arr(i, itemA) j = j + 1 Next Next i ReDim
在事前不知道数组的大小时，可以声明数组为动态数组，在需要指定数组大小时，再使用ReDim语句分配数组的实际元素的个数。...1、动态数组是可以改变大小的数组，通过在数组名称后附带空括号来声明，如： Dim arrSheetName() as String 2、在定义动态数组之后，必须使用ReDim来设置动态数组的上界和下界，...3、我们可以使用ReDim语句反复地改变数组的元素个数。...最后一个非空单元格行号 j = 1 '数组索引号 xcount = Application.WorksheetFunction.CountIf([c1:c65536], "王*") '统计有多少姓王的学生 ReDim...2 xcount = Application.WorksheetFunction.CountIf([c1:c65536], "王*") '统计有多少姓王的学生 ReDim arr(1 To xcount
("Scripting.FileSystemObject") Set sfld = sfso.GetFolder(folderspec) Set sffs = sfld.Files ReDim...temparr(1 To 1) For Each sff In sffs n = n + 1 If n > UBound(temparr) Then ReDim Preserve...For j = LBound(crr) To UBound(crr) k = k + 1 If k > UBound(FileArr) Then ReDim...("Scripting.FileSystemObject") Set sfld = sFso.GetFolder(folderspec) Set sffs = sfld.Files ReDim...temparr(1 To 1) For Each sff In sffs n = n + 1 If n > UBound(temparr) Then ReDim Preserve
Scripting.FileSystemObject") Set sfld = sfso.GetFolder(folderspec) Set sffs = sfld.Files ReDim...temparr(1 To 1) For Each sff In sffs n = n + 1 If n > UBound(temparr) Then ReDim...选择文件夹获取文件列表包括子文件夹() Dim FilePath As String, i As Long, k As Long Dim PathArr(), FileArr ReDim...Scripting.FileSystemObject") Set sfld = sFso.GetFolder(folderspec) Set sffs = sfld.Files ReDim...temparr(1 To 1) For Each sff In sffs n = n + 1 If n > UBound(temparr) Then ReDim
是自定义的一个发送过程: Private Sub Send_File() Dim i As Long ‘循环变量 If Number <= BagNum – 1 Then ReDim...Buff(1 To BagSize) As Byte ‘定义缓冲区 ReDim TempBuff(0 To BagSize) As Byte Get 1, ,...‘传送最后一个数据包 n = filelength – Seek(1) + 1 ‘得到最后一个包的大小 If n > 0 Then ReDim...Buff(0 To n) As Byte ReDim TempBuff(0 To n) As Byte TempBuff(0) = 1 ‘设置包头为..., vbYesNo, “提示”) = vbNo Then Number = 0: Close 1 End If ReDim Buff(Len(sendFileName
cf.ReadLong() tEOCD.OffsetOfCD = cf.ReadLong() tEOCD.CommentLength = cf.ReadInteger() ReDim...LFHs(tEOCD.TotalNumberOfCDRecords - 1) As LocalFileHeader ReDim CDHs(tEOCD.TotalNumberOfCDRecords...- 1) As CentralDirectoryHeader ReDim FileArr(tEOCD.TotalNumberOfCDRecords - 1) As String End Function....FileName = VBA.StrConv(b, vbUnicode) If CDHs(i).ExtraFieldLength Then ReDim...cf.Read b lfh.FileName = VBA.StrConv(b, vbUnicode) If lfh.ExtraFieldLength Then ReDim
改写的数据超过了原来的范围，并且超越了扇区" Exit Function End If End If Dim b() As Byte ReDim...(i) = WriteBytes(p) p = p + 1 If p = ilen Then ReDim...cf.ArrDir(dirIndex).StartingSectorID Dim i As Long Dim p As Long Dim b() As Byte ReDim...(i) = WriteBytes(p) p = p + 1 If p = ilen Then ReDim
As String M = Trim(Text1.Text) N = Trim(Text2.Text) Dim Number1() As Byte Dim Number2() As Byte ReDim...Number1(Len(M)) ReDim Number2(Len(N)) Dim index As Byte For index = 1 To Len(M) Step 1 Number1(index...For index = 1 To Len(N) Step 1 Number2(index) = Mid(N, index, 1) Next index Dim Result() As Byte ReDim
i68 As Integer '选择前12列数据并赋给数组 x = Sheet1.Cells(1).CurrentRegion.Resize(,12) '重新定义数组大小 ReDim...Data61(1 To UBound(x, 1), 1 To 12) ReDim Data62(1 To UBound(x, 1), 1 To 12) ReDim Data63(1 To...UBound(x, 1), 1 To 12) ReDim Data6465(1 To UBound(x, 1), 1 To 12) ReDim Data68(1 To UBound(x
Scripting.FileSystemObject") Set sfld = sfso.GetFolder(folderspec) Set sffs = sfld.Files ReDim...temparr(1 To 1) For Each sff In sffs n = n + 1 If n > UBound(temparr) Then ReDim...CreateObject("Scripting.FileSystemObject") Set sfld = sfso.GetFolder(folderspec) Set sffs = sfld.Files ReDim...temparr(1 To 1) For Each sff In sffs n = n + 1 If n > UBound(temparr) Then ReDim Preserve temparr
("Scripting.FileSystemObject") Set sfld = sfso.GetFolder(folderspec) Set sffs = sfld.Files ReDim...temparr(1 To 1) For Each sff In sffs n = n + 1 If n > UBound(temparr) Then ReDim Preserve...Scripting.FileSystemObject") Set sfld = sfso.GetFolder(folderspec) Set sffs = sfld.Files ReDim...temparr(1 To 1) For Each sff In sffs n = n + 1 If n > UBound(temparr) Then ReDim
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