Array remove element

PowerShell Help
1

i have array :

Clear-Host;
$arr=@();
Add-Type @’
public class MyObject2
{
public int MyField = 5;
public void xTimesMyField(int x) {
MyField=x;
}
}
'@
for( $i=1;$i -le 10;++$i){
$object = New-Object MyObject2;
$object.xTimesMyField($i);
$arr+=$object;
}
$arr

how can i remove one of the elements of the array by theMyField property when it equales to certain value?

2

You can’t remove elements from a .NET Array object. You can either use another type of collection (such as an ArrayList), or you can filter the elements and assign them to a new array object (even if it’s in the same variable.) For example:

$arr = $arr | Where-Object { $_.MyField -ne 'SomeValue' }
3

thanks

4

You can do some funky stuff with multiple assignment and recursion to remove an element.

Removing based on what the element is.

`

function remove-item-list ($item,[array]$chckd_list=@(),[array]$list=(throw"the item $item was not in the list"))

{ if ($list.length -lt 1 ) { throw "the item $item was not in the list" }


$check_item,$temp_list=$list

if ($check_item -eq $item ) {

$chckd_list+=$temp_list

return $chckd_list }

else {

$chckd_list+=$check_item

return (remove-item-list -item $item -chckd_list $chckd_list -list $temp_list )}

}

`

Removing based on index number.

`

function remove-index-list ([int]$count=0,[int]$index,[array]$chckd_list=@(),[array]$list)

{if (($list.length+$count-1) -lt $index ) { throw "the index is out of range" }

$check_item,$temp_list=$list

if ($count -eq $index) {

$chckd_list+=$temp_list

return $chckd_list}

else {

$chckd_list+=$check_item

return (remove-index-list -count ($count + 1) -index $index -chckd_list $chckd_list -list $temp_list )}


}

`