Small knitting in the use of PowerShell, often use Get-childitem (alias dir), to get some files or directories. The results are then filtered by file type, or file suffix. Many times such a work to do down, small make up feel vexed, there is no simple, once and for all method? We'll discuss it today.
No suspense, first give a filter code, we first look at:
Copy Code code as follows:
Filter where-extension
{
Param
(
[string[]]
$extension = ('. png ', '. jpg ', '. gif ')
)
$_ |
Where-object {
$extension-contains $_. Extension
}
}
What is filter, so to speak, is similar to the function, but is placed behind the pipe. So you'll see "$_ |" Inside the filter. Such a token. This filter requires passing in an array parameter, which is the suffix list. If you do not pass, then filter by default. png,.jpg and. gif.
Okay, let's see how it's used.
I want to filter all of the TXT or. log text files in the D-packing directory, PowerShell script writes:
Copy Code code as follows:
Dir d:\ | Where-extension. Txt,.log
You can make up with the small, put this filter into the profile inside, so that each call is no longer defined and directly used. Ah? You don't know what profile is? Then go and see this article.
