Compare Elements in Array for While Loop - Powershell

Question

I am attempting to create a script to read a CSV, then perform some operations on the contents where the first field are similar. Right now I'm stuck on trying to set up the second While loop to compare the current element to the next one.

I'm fairly new to this, because I wasn't getting anywhere trying this in Java. I can't seem to find a combination of commands that will let the loop work.

Some things I've tried are:

While($csv[$count].ip -eq $csv[$count++].ip)

While((diff $csv[count].ip $csv[$count++].ip) = true)

While($csv[$count].ip = $csv[$count++].ip)

Tough to tell you what you are doing wrong if we don't know what you are doing... — EBGreen
– EBGreen, Commented Feb 27, 2018 at 19:16
Update your question with a few sample CSV lines and explain what you are trying to compare and why. Make it possible for readers to precisely reproduce your problem. — Bill_Stewart
– Bill_Stewart, Commented Feb 27, 2018 at 19:40

HeedfulCrayon · Accepted Answer · 2018-02-27 19:44:58Z

1

Don't use $count++ unless you want to actually change the value of $count itself. Instead use $count + 1 as the array index

$count = 0
while($count -le $csv.Count){
    if($csv[$count].ip -eq $csv[$count + 1].ip){
        # Do your stuff here
    }
    $count++
}

answered Feb 27, 2018 at 19:44

HeedfulCrayon

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2 Comments

Binsky734 Over a year ago

That solves that, but it looks like my code is ignoring variables from inside the loop even if I add script: or global:

HeedfulCrayon Over a year ago

@Binsky734 can you post more of the code? I might be able to help

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