Convert a PowerShell List of alternating key value pairs to a hashtable

Question

What is the best way to convert a List to a Hashtable.

Say I have a list like

("Key",$value,"Key2",$value2)

What is the shortest syntax to convert it into a Hashtable?

Answer 1

Try the following

$table = new-object System.Collections.Hashtable
for ( $i = 0; $i -lt $list.Length; $i += 2 ) {
  $table.Add($list[$i],$list[$i+1]);
}

Answer 2

How about:

$ht = @{}
$key = "";
("Key",5,"Key2",6) | foreach `
{  
    if($key)  
    {
        $ht.$key = $_; 
        $key=""; 
    } else 
    {$key=$_}   
}

Answer 3

$h = @{}  
0..($l.count - 1) | ? {$_ -band 1} | % {$h.Add($l[$_-1],$l[$_])}  

$h = @{}  
0..($l.count - 1) | ? {$_ -band 1} | % {$h.($l[$_-1]) = $l[$_]}  

$h = @{}  
$i = 0  
while ($i -lt $l.count) {$h.Add($l[$i++],$l[$i++])}

Answer 4

Function ConvertTo-Hashtable($list) {
    $h = @{}

    while($list) {
        $head, $next, $list = $list
        $h.$head = $next
    }

    $h
}

ConvertTo-Hashtable ("Key",1,"Key2",2)