集合

求B的补集:

$A = 1, 2, 3, 4

$B = 2,4

$A | where {$B -notcontains $_}

 

求A,B的交集:

$A = 1, 2, 3, 4

$B = 2,4

$A | where {$B -contains $_}

 

求A,B的全集:

$A = 1, 2, 3, 4

$B = 2, 4, 9

$AjiaoB = $A | where {$B -contains $_}  #A与B的交集

$AA = $a | where {$AjiaoB -notcontains $_}  #$AjiaoB相对于$A的补集

$BB = $b | where {$AjiaoB -notcontains $_}  #$AjiaoB相对于$B的补集

($AjiaoB + $AA + $BB) | Sort-Object -Descending