Question

我是一名自学成才的新手程序员，我觉得这是一个非常基本的问题，如果我真的学过计算机科学，我就能回答这个问题：P在我搜索intertrons和StackOverflow我一直无法找到我正在寻找的答案。所以我希望有人可以放纵我。

我有一组对象。我想一次操作五个，然后继续下一个五个。上下文正在重启一堆虚拟机;我被要求错开它们，这样主机就不会被所有虚拟机重新启动了。

我感觉正确的路径是某个容量的for i循环，而不是foreach。我也觉得它可能是do-until和for i的组合，但我不能从我的大脑中筛选答案。

我可以通过从集合中删除对象来实现，但这感觉就像“错误”的方式，即使它可以工作。

我正在使用Powershell和PowerCLI这样做，但我觉得我试图理解的逻辑比依赖任何语言更基本，所以即使你不熟悉Powershell，我也是对你的答案感兴趣。

编辑：根据David的回答，以下代码似乎是我正在寻找的：

$someLetters = @("a","b","c","d","e","f","g","h","i","j","k")

for($i=0; $i -lt $someLetters.length; $i+=5)
{
    Write-Host ("the letter is " + $someLetters[$i] + " and i is " + $i)
    Write-Host ("the letter is " + $someLetters[$i+1] + " and i is " + $i)
    Write-Host ("the letter is " + $someLetters[$i+2] + " and i is " + $i)
    Write-Host ("the letter is " + $someLetters[$i+3] + " and i is " + $i)
    Write-Host ("the letter is " + $someLetters[$i+4] + " and i is " + $i)
    write-host "finished block of five"
}

给出输出：

the letter is a and i is 0
the letter is b and i is 0
the letter is c and i is 0
the letter is d and i is 0
the letter is e and i is 0
finished block of five
the letter is f and i is 5
the letter is g and i is 5
the letter is h and i is 5
the letter is i and i is 5
the letter is j and i is 5
finished block of five
the letter is k and i is 10
the letter is  and i is 10
the letter is  and i is 10
the letter is  and i is 10
the letter is  and i is 10
finished block of five

谢谢大卫！

Answer 1

你没有说明你的物品是什么类型的容器。我会假设它是一个数组。所以，你可以这样做：

for($i=0; $i -lt $objectArray.length; $i+=5)
{
    #do something with $objectArray[$i]
}

一次循环遍历一组对象

1 个答案: