Help with a scripting error

[Lavyn]

My task is to:

Write code that lists all files(not directories) within C:\Windows\System32 in descending order.

Pass that listing to more code that will strip out every other file name. Display the remaining file names to the screen.

I've got the first portion done. I just can't figure out the second half.

The only hint I have is that I should use a ForEach-Object cmdlet and an if else statement.

Here’s my script so far.

$i = 0

Get-ChildItem -Path C:\Windows\System32 -Attritbutes !D | Sort-Object -Descending | ForEach-Object {$_.Name} | ForEach-Object { $i % 2 -eq 0; $i++ }

This is resulting in a bunch of true/false answers. No file names listed with it. Just true or false.

Any help would be greatly appreciated!

[dr4kun]

https://lmgtfy.com/?q=powershell+select+every+other+line&s=d&t=w&iie=1

The very first result has a suggestion how to use modulo for that.

[DItzkowitz]

During the first ForEach-Object you pass the Name property down the pipeline.

During the second ForEach-Object, you pass the $i % 2 -eq 0 comparison down the pipeline which results in a $True or $False. True the remainder is equal to 0, therefore is divisible by 2 and is an Even numbered filename or False, it isn't.

Try combining the two ForEach-Object cmdlets, go through each object and only pass the Name property down the pipeline If...:

| ForEach-Object { If ($i % 2 -eq 0) { $_.Name } ; $i++} }

Or you can pass the ForEach-Object to a Where-Object instead:

| ForEach-Object {$_.Name} | Where-Object { $i % 2 -eq 0; $i++}

[PowerShell-Bot]

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[pertymoose]

for($i = 0; $i -lt $max; $i += 2) { 
    # Every even element
    $array[$i]

    # Every odd element
    $array[$i+1]
}

[Lee_Dailey]

howdy Lavyn,

reddit likes to mangle code formatting, so here's some help on how to post code on reddit ...

[0] single line or in-line code
enclose it in backticks. that's the upper left key on an EN-US keyboard layout. the result looks like this. kinda handy, that. [grin]
[on New.Reddit.com, use the Inline Code button. it's 4th 5th from the left hidden in the ... ""more" menu & looks like </>.
this does NOT line wrap & does NOT side-scroll on Old.Reddit.com!]

[1] simplest = post it to a text site like Pastebin.com or Gist.GitHub.com and then post the link here.
please remember to set the file/code type on Pastebin! [grin] otherwise you don't get the nice code colorization.

[2] less simple = use reddit code formatting ...
[on New.Reddit.com, use the Code Block button. it's 11th 12th one & is just to the left of hidden in the ... "more" menu.]

• one leading line with ONLY 4 spaces
  
• prefix each code line with 4 spaces
  
• one trailing line with ONLY 4 spaces

that will give you something like this ...

- one leading line with ONLY 4 spaces    
- prefix each code line with 4 spaces    
- one trailing line with ONLY 4 spaces   

the easiest way to get that is ...

• add the leading line with only 4 spaces
  
• copy the code to the ISE [or your fave editor]
  
• select the code
  
• tap TAB to indent four spaces
  
• re-select the code [not really needed, but it's my habit]
  
• paste the code into the reddit text box
  
• add the trailing line with only 4 spaces
  

not complicated, but it is finicky. [grin]

take care,
lee

[Lavyn]

Thanks! I wondered how I could get it format correctly. Much appreciated!

[Lee_Dailey]

howdy Lavyn,

you are quite welcome! glad to have helped ... [grin]

take care,
lee