foreach($arr as $k=>$v) 请问里面的“=>”符号是什么意思?

foreach($arr as $k=>$v) 请问里面的“=>”符号是什么意思? foreach(int n in arr) Console.WriteLine({0},n+ );请问这个n+ foreach($list_role as $key=>$val){ $role_cn[$list_role[$key][id]]=$list_role[$key][title]; } {foreach from=$ads item=ad}{$ad}{/foreach} VBA,定义一个二维数组arr(1 to 20,1 to y),求arr(k,1 to y)的平均数和标准差?For k = 1 To 20avg(k) = Application.WorksheetFunction.Average(arr(k,1 to y))std(k) = Application.WorksheetFunction.StDev(arr(k,1 to y))'红色报错,请问averag php中foreach($_DTYPE as $optionid => $option)是什么意思这是discuz!中forumsor.func.php中的一句代码,as、=>这俩符号是什么意思 有如下程序dim arr(3,3) for j=1 to 3 for j=1 to 3 arr(j,k)=(j-1)*3+k next k next j有如下程序dim arr(3,3) for j=1 to 3 for j=1 to 3 arr(j,k)=(j-1)*3+k next k next j for j=2 to 3 for k=2 to 3 print arr(k,j); next k print next j 运行程序后 sort()数字排序中：arr.sort(sortNumber)调用的过程给讲一下!function sortNumber(a,b){return a - b}var arr = new Array(6)arr[0] = 10arr[1] = 5arr[2] = 40arr[3] = 25arr[4] = 1000arr[5] = 1document.write(arr + )document.write(a Dim arr(0 To 30,0 To 11) As Double for i = 1to31 arr(m-1,0)=arr(m-1,0)+1 next i 表达有啥毛病?刚才问题可能没说清楚我想建立一个数组,然后在一定条件判断下让数组里的数从0开始加,每满足一个条件就加1.Dim a 【例4】(2000年4月)下列程序执行后的输出结果是( ).main(){char arr[10];strcpy(arr,your); strcat(arr,me);arr[3]='&';printf(%s ,arr);}A.you&me B.you C.me D.err 下列程序执行后的输出结果是（ ）.#include main() { char arr[2][4]; strcpy(arr[0],you);strcpy(arr[1],me);arr[0][3]='&';printf(%s ,arr); } a、you&me b、you c、me d、err 英语翻译function _stripslashes_rcurs($variable,$top = true){$clean_data = array();foreach ($variable as $key => $value){$key = ($top) $key :stripslashes($key);$clean_data[$key] = (is_array($value)) stripslashes_rcurs($value,false) :stripslashes($ 能不能再帮我看一道题sum Fun (a() as integer,x as integer) for i = 1 to 4 x = x * a(i)Private sub command _click() n=1 for i = 1 to 4 arr(i)=i+i next Fun arr,n text1.text=str(n)End sub求文本框显示的 下面代码如何理解：for i=2 to ubound(arr) d(arr(i,3))=d(arr(i,3))+1 nextd是字典对象. 语句dim arr(-3 to 5,2 to 6)as integer定义的数组元素有 下列代码的意思Sub Saveas()Dim Mrow%,I%,n%Dim Y As Integer'Arr = [a2].CurrentRegion'n = UBound(Arr)n = [a2].End(xlDown).RowY = MsgBox(记录是否需要保存!,4)If Y = 7 ThenExit SubEnd If With Sheets(销售单明细表).SelectMrow = Range s=s+arr(j,1)*Val(Mid(p,j, VBA Arr = .Range(A1:C & .[A65536].End(xlUp).Row)