powershell - 删除数组重复项，但保留原始

Question

我有一个数组:

Name
----
hi
hello
hello

我想删除所有重复的内容-但请保留至少一份原件。所以输出应该像

Name
----
hi
hello

Answer 1

Select-Object-唯一

Specifies that if a subset of the input objects has identical properties and values, only a single member of the subset will be selected.

This parameter is case-sensitive. As a result, strings that differ only in character casing are considered to be unique.

示例5:从数组中选择唯一字符

PS C:\>"a","b","c","a","a","a" | Select-Object -Unique

a
b
c

此命令使用 Unique的 Select-Object参数从字符数组中获取唯一字符。