我试图使用PowerShell将下面的数组拆分为多个较小的数组。但是逐行输出文本文件需要很长时间。还有其他方法可以提高性能吗?
原始阵列 ( $FRUITARRAY
(:
橙色,1,4,5,6,7,8苹果,1,3,2,4,5橙色,2,4,5,6,7,8橙色,3,4,5,6,7,8苹果,2,3,2,4,5橙色,4,4,5,6,7,8橙色,5,4,5,6,7,8苹果,3,3,2,4,5苹果,4,3,2,4,5
所需的输出数组:
$ORANGERRAY
:
橙色,1,4,5,6,7,8橙色,2,4,5,6,7,8橙色,3,4,5,6,7,8橙色,4,4,5,6,7,8橙色,5,4,5,6,7,8
$APPLEARRAY
:
苹果,1,3,2,4,5苹果,2,3,2,4,5苹果,3,3,2,4,5苹果,4,3,2,4,5
法典:
$FRUITARRAY = Get-Content 'D:workfruit.txt'
for ($i=1; $i -lt $FRUITARRAY.Length; $i++) {
if ($FRUITARRAY[$i].Split(',')[0].StartsWith('ORANGE')) {
$FRUITARRAY[$i] | Out-File "D:workORANGE.TXT" -Append
}
if ($FRUITARRAY[$i].Split(',')[0].StartsWith('APPLE')) {
$FRUITARRAY[$i] | Out-File "D:workAPPLE.TXT" -Append
}
}
$ORANGEARRAY = Get-Content "D:workORANGE.TXT"
$APPLEARRAY = Get-Content "D:workAPPLE.TXT"
可以
说最优雅的解决方案是Group-Object
:
$fruits = Get-Content 'D:workfruit.txt' | Group-Object { $_.Split(',')[0] }
$apples = $fruits |
Where-Object { $_.Name -eq 'apple' } |
Select-Object -Expand Group
$oranges = $fruits |
Where-Object { $_.Name -eq 'orange' } |
Select-Object -Expand Group