哈希键和值的比较不相等 [重复]

问：

为什么整数哈希键不是整数？键的类型为 KeyCollection，即使它是从常量整数创建的。

生成此输出的脚本如下。我将仅显示最后三 （3） 个命令行。为什么键不是某种类型的整数？

PS C:\> $h.Keys[0].GetType()    # the type of the first and only item in the set of keys is KeyCollection, not an int of some kind

IsPublic IsSerial Name                                     BaseType
-------- -------- ----                                     --------
False    False    KeyCollection                            System.Object

PS C:\> 1 -eq $h.Keys[0]        # comparing 1 and the key both ways produces different results ???
False
PS C:\> $h.Keys[0] -eq 1
1

PS C:\> $PSVersionTable.PSVersion.ToString()
7.3.6

这是导致这种情况的脚本。

$h = @{}
$hi1 = @{1='a';2='b'}   # create a hash
$h.GetType()            # yes, it is a hashtable
$h.Count                # there should be none (0) at this point
$h[1] += @($hi1)        # put an array containing a hash into h
$h[1]                   # check to see that the array containing a hash is in the hash h
$h[1].Count             # there should be one (1) item in the hash
$h[1].GetType()         # the item at hash index 1 should be an array
$h[1][0]                # this is the first and only element in the array
$h[1][0].GetType()      # the first item in the array is a hashtable

$h.Keys                 # there is only one key in the hash
$h.Keys.GetType()       # the type of the Keys object is a KeyCollection
$h.Keys[0]              # the first and only item in the set of keys is 1
$h.Keys[0].GetType()    # the type of the first and only item in the set of keys is KeyCollection, not an int of some kind
1 -eq $h.Keys[0]        # comparing 1 and the key both ways produces different results ???
$h.Keys[0] -eq 1