Updating hash table values in a 'foreach' loop in PowerShell

Question

I\'m trying to loop through a hash table and set the value of each key to 5 and PowerShell gives an error:

$myHash = @{}
$myHash[\"a\"] = 1
$myHash[\"b\"] =          


        

Answer 1

You can't modify Hashtable while enumerating it. This is what you can do:

$myHash = @{}
$myHash["a"] = 1
$myHash["b"] = 2
$myHash["c"] = 3

$myHash = $myHash.keys | foreach{$r=@{}}{$r[$_] = 5}{$r}

Edit 1

Is this any simpler for you:

$myHash = @{}
$myHash["a"] = 1
$myHash["b"] = 2
$myHash["c"] = 3

foreach($key in $($myHash.keys)){
    $myHash[$key] = 5
}