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。）
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
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
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
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
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
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
var As Variant, x As Long Dim yl As Long, re As Long, bl As Long, gr As Long With Application ReDim...yVar(.CountIf(Range("B:B"), "yl") - 1, 1 To 1) ReDim rVar(.CountIf(Range("B:B"), "re") - 1, 1 To...1) ReDim bVar(.CountIf(Range("B:B"), "bl") - 1, 1 To 1) ReDim gVar(.CountIf(Range("B:B"), "gr")...g As Long var = Range("A2:B" & Range("A" & Rows.Count).End(xlUp).Row).Value With Application 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...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
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
("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
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
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
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
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
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
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