Powershell从文件列表填充数组

Question

I need to populate a powershell array with the filenames of files stored in a directory based on their names. I need a different array for each set of files (see Example folder structure) to be used as part of another process.

I would like this to be automatic and create the arrays on the fly, so I would have arrays containing all the filenames starting with processor123 , another for processorabc and processorxyz . The names of these arrays can be stored in another array named $arrynames . It needs to be dynamic in case a new processor is introduced, I do not want to rely on users to enter the file names.

Example folder structure;

c:\directory\processor123\processor123.log.20150604
c:\directory\processor123\processor123.log.20150603
c:\directory\processor123\processor123.log.20150602
c:\directory\processor123\processor123.log.20150601
c:\directory\processor123\processor123.log.20150531
c:\directory\processorabc.log.20150604
c:\directory\processorabc.log.20150603
c:\directory\processorabc.log.20150602
c:\directory\processorabc.log.20150601
c:\directory\processorabc.log.20150531
c:\directory\processorxyz.log.20150604
c:\directory\processorxyz.log.20150603
c:\directory\processorxyz.log.20150602
c:\directory\processorxyz.log.20150601
c:\directory\processorxyz.log.20150531

$ArryNames

processor123
processorabc
processorxyz

$processor123

c:\directory\processor123\processor123.log.20150604
c:\directory\processor123\processor123.log.20150603
c:\directory\processor123\processor123.log.20150602
c:\directory\processor123\processor123.log.20150601
c:\directory\processor123\processor123.log.20150531

$processorabc

c:\directory\processorabc.log.20150604
c:\directory\processorabc.log.20150603
c:\directory\processorabc.log.20150602
c:\directory\processorabc.log.20150601
c:\directory\processorabc.log.20150531

Answer 1

So, what you'll want to do for each string:

1. Extract first part of file name
2. Put entire string into array matching the first part

As already mentioned in comments, you can use a hashtable to hold the arrays, with the file prefix being the key:

# Set up a hashtable
$HashTable = @{}

# Pipe your list of file paths to ForEach-Object
Get-Content C:\filenames.txt |ForEach-Object {
    # Extract the filename with [System.IO.Path]::GetFileName(), split it by dots and grab only the part before the first dot
    $Prefix = [System.IO.Path]::GetFileName($_) -split "\." |Select-Object -First 1
    # Use the extracted prefix to place the string in the correct hashtable entry
    $HashTable[$Prefix] += $_
}

Now, you can reference the first 5 paths with: $HashTable["processor123"]