使用两个等长数组执行数学运算 [英] Perform math operations with two equal length arrays

问题描述

我正在做的事情是如此简单，以至于我一直在努力寻找答案.我正在尝试互相减去两个等长的数组

What I'm doing is so simple that I'm struggling to find an answer for it. I'm trying to subtract two equal length arrays from one another

$free_array = get-wmiobject -class win32_logicaldisk | select -ExpandProperty freespace
$size_array = get-wmiobject -class win32_logicaldisk | select -ExpandProperty size

ForEach ($size in $size_array)
  {
    Write-Host Statistic: $size - $freespace
  }

推荐答案

我不认为PowerShell具有内置功能可以同时跨多个数组进行映射，因此可以使用

I don't think that PowerShell has a built-in function to map across multiple arrays simultaneously and so instead you can use a range operator and then index into both arrays as needed:

foreach ($Index in (0..($free_array.Count - 1))) {
    Write-Host Statistic: ($size_array[$Index] - $free_array[$Index])
}

但是，您的任务也可以像这样完成，我认为这样可读性更强:

However, your task could also be done like this which I think would be more readable:

$LogicalDisks = Get-CimInstance -ClassName Win32_LogicalDisk

foreach ($LogicalDisk in $LogicalDisks) {
    Write-Host Statistic: ($LogicalDisk.Size - $LogicalDisk.FreeSpace)
}

这篇关于使用两个等长数组执行数学运算的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！