类似于Powershell的操作员困惑

Question

为什么以下Powershell代码给出false而不是true？

"ok" -like "??p*"

Answer 1

Because * is a wildcard/glob and not a regex metacharacter.

Your pattern ??p* isn't saying "any two characters followed by zero-or-more 'p' characters" it is saying "any two characters followed by a 'p' followed by anything".

Answer 2

Your wildcard expression expect at least 3 characters with the third character being a p. As this is not the case the expression will return false.

See http://ss64.com/ps/syntax-wildcards.html