How to find ls only files with uppercases in name?

Question

I want to filter only files and folders with name start with 2[A-Z] (uppercase only):

ls -recurse | Where-Object {$_.name -match '2[A-Z]'}

But it still returns lowercase files. Reading the -match parameter of Where-Object I don't see a way to fix this.

As an aside: Your doc link describes the `-Match` _parameter_ of the `Where-Object` cmdlet, which, when using [simplified syntax](https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_Simplified_Syntax), refers to the [`-match` _operator_](https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_Comparison_Operators#-match-and--notmatch), which exists independently of the cmdlet. — mklement0, Dec 25 '22 at 06:12
Does this answer your question? [How to do a case-sensitive file search with PowerShell?](https://stackoverflow.com/questions/26432076/how-to-do-a-case-sensitive-file-search-with-powershell) — zett42, Dec 25 '22 at 11:45

mklement0 · Accepted Answer · 2022-12-25T06:16:14.807

PowerShell's comparison operators are case-insensitive by default, but they have c-prefixed variants that are case-sensitive, namely -cmatch in the case of the -match operator:

gci -recurse | Where-Object { $_.Name -cmatch '^2[A-Z]' }

gci is used as the PowerShell-idiomatic alternative to the Windows-only ls alias for Get-ChildItem.
- See the bottom section of this answer for more information on why aliases named for commands or utilities of a different shell or platform are best avoided.
Regex assertion ^ is used to ensure that the pattern only matches at the start of file names.

Alternatively, use simplified syntax:

gci -recurse | Where-Object Name -cmatch '^2[A-Z]'

@Ooker, please see my update, also re simplified syntax. – mklement0 Dec 25 '22 at 06:10 — mklement0, Dec 25 '22 at 06:10

How to find ls only files with uppercases in name?

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