Loop through multiple array in powershell

Question

I have 2 arrays here one contains the servername and other contains the IP.

I need to loop through them and create a key value pair like below for each server

server1:ip1
server2:ip2

I have written below code, but the problem is if i debug the code using F11, it is working fine, but i don't it gives some error which is different every time.

so feeling like it is not that reliable piece to continue.

    $NewDNSEntryName = $DNSEntryName.Split(",")
    $DNSIPs = $DNSIP.Split(",")


if($DNSEntryName -match "," -or $DNSIP -match ",")
    {   

   0..($NewDNSEntryName.Count - 1) | ForEach-Object {

   $fullName=""
   $fullName += @("$($NewDNSEntryName[$_]):$($DNSIPs[$_])")

This is the line where i am facing trouble

0..($NewDNSEntryName.Count - 1) | ForEach-Object

Please let me know why this code is behaving like this else any alternate idea is appreciated

Can you update your question with some specific issues/errors you are getting? — Mark Harwood
– Mark Harwood, Commented Aug 13, 2019 at 15:53
Does each list align exactly? If so, you can use a standard for loop and access the same index among each list. So $NewDNSEntryName[0] and $DNSIPs[0] would correspond. — AdminOfThings
– AdminOfThings, Commented Aug 13, 2019 at 15:54
There is no error. what it does it directly comes out of the loop without executing anything. — Sandy
– Sandy, Commented Aug 13, 2019 at 15:56

AdminOfThings · Accepted Answer · 2019-08-13 16:08:12Z

3

Assuming each item in each list corresponds with each other exactly, you can use a for loop and loop through the array indexes.

$NewDNSEntryName = $DNSEntryName.Split(",")
$DNSIPs = $DNSIP.Split(",")

for ($i = 0; $i -lt $DNSIPs.count; $i++) {
    "{0}:{1}" -f $NewDNSEntryName[$i],$DNSIPs[$i]
}

For the code above to work, $DNSEntryName and $DNSIP must be single strings with commas between names and IPs. If $DNSEntryName and $DNSIP are already lists or arrays, something else will need to be done.

In your attempt, technically, your logic should work given everything written above is true. However, $fullName is emptied at every single iteration, which may produce undesirable results.

edited Aug 13, 2019 at 16:08

answered Aug 13, 2019 at 15:57

AdminOfThings

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1 Comment

Sandy Over a year ago

Thanks @AdminOfThings

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