如何使用PowerShell中的破折号/连字符进行字符比较？

nwo49xxi 于 2022-11-10 发布在 Shell

关注(0)|答案(2)|浏览(202)

我正在做一个人物比较，我不明白为什么这不起作用。我已经尝试了下面列出的不同选项，并尝试了后空格附近的连字符和数字键盘上的连字符。我尝试将其转换为字符字节值，但失败了。我已经将‘-’转换为char变量，它仍然失败吗？
解决这一问题的办法是什么？

[DBG]: PS C:\> $line.GetType()

IsPublic IsSerial Name                                     BaseType                                                                                                                             
-------- -------- ----                                     --------                                                                                                                             
True     True     String                                   System.Object      

[DBG]: PS C:\> $line[$i]
–
[DBG]: PS C:\> $line[$i] -eq "-"
False
[DBG]: PS C:\> $line[$i] -eq "-"
False
[DBG]: PS C:\> [byte[]][char[]]"-"
45
[DBG]: PS C:\> [byte[]][char[]]$line[$i]
Cannot convert value "–" to type "System.Byte". Error: "Value was either too large or too small for an unsigned byte."
At line:1 char:1
+ [byte[]][char[]]$line[$i]
+ ~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidArgument: (:) [], RuntimeException
    + FullyQualifiedErrorId : InvalidCastIConvertible

[DBG]: PS C:\> $line[$i] -eq "\-"
False
[DBG]: PS C:\> $line[$i] -eq "`-"
False
[DBG]: PS C:\> $line[$i] -eq '\-'
False
[DBG]: PS C:\> $line[$i] -eq '`-'
False
[DBG]: PS C:\> $line[$i] -like '-'
False
[DBG]: PS C:\> $line[$i] -like "-"
False
[DBG]: PS C:\> $line[$i] -match '-'
False
[DBG]: PS C:\> $line[$i] -match "-"
False
[DBG]: PS C:\> $line[$i].GetType()

IsPublic IsSerial Name                                     BaseType                                                                                                                             
-------- -------- ----                                     --------                                                                                                                             
True     True     Char                                     System.ValueType                                                                                                                     

[DBG]: PS C:\> $line[$i] | gm

   TypeName: System.Char

Name        MemberType Definition                                                                                                                                              
----        ---------- ----------                                                                                                                                              
CompareTo   Method     int CompareTo(System.Object value), int CompareTo(char value), int IComparable.CompareTo(System.Object obj), int IComparable[char].CompareTo(char other)
Equals      Method     bool Equals(System.Object obj), bool Equals(char obj), bool IEquatable[char].Equals(char other)                                                         
GetHashCode Method     int GetHashCode()                                                                                                                                       
GetType     Method     type GetType()                                                                                                                                          
GetTypeCode Method     System.TypeCode GetTypeCode(), System.TypeCode IConvertible.GetTypeCode()                                                                               
ToBoolean   Method     bool IConvertible.ToBoolean(System.IFormatProvider provider)                                                                                            
ToByte      Method     byte IConvertible.ToByte(System.IFormatProvider provider)                                                                                               
ToChar      Method     char IConvertible.ToChar(System.IFormatProvider provider)                                                                                               
ToDateTime  Method     datetime IConvertible.ToDateTime(System.IFormatProvider provider)                                                                                       
ToDecimal   Method     decimal IConvertible.ToDecimal(System.IFormatProvider provider)                                                                                         
ToDouble    Method     double IConvertible.ToDouble(System.IFormatProvider provider)                                                                                           
ToInt16     Method     int16 IConvertible.ToInt16(System.IFormatProvider provider)                                                                                             
ToInt32     Method     int IConvertible.ToInt32(System.IFormatProvider provider)                                                                                               
ToInt64     Method     long IConvertible.ToInt64(System.IFormatProvider provider)                                                                                              
ToSByte     Method     sbyte IConvertible.ToSByte(System.IFormatProvider provider)                                                                                             
ToSingle    Method     float IConvertible.ToSingle(System.IFormatProvider provider)                                                                                            
ToString    Method     string ToString(), string ToString(System.IFormatProvider provider), string IConvertible.ToString(System.IFormatProvider provider)                      
ToType      Method     System.Object IConvertible.ToType(type conversionType, System.IFormatProvider provider)                                                                 
ToUInt16    Method     uint16 IConvertible.ToUInt16(System.IFormatProvider provider)                                                                                           
ToUInt32    Method     uint32 IConvertible.ToUInt32(System.IFormatProvider provider)                                                                                           
ToUInt64    Method     uint64 IConvertible.ToUInt64(System.IFormatProvider provider)                                                                                                                                                                                                                

[DBG]: PS C:\> [char]$ch = '-'
[DBG]: PS C:\> $ch.GetType()

IsPublic IsSerial Name                                     BaseType                                                                                                                             
-------- -------- ----                                     --------                                                                                                                             
True     True     Char                                     System.ValueType                                                                                                                     

[DBG]: PS C:\> $line[$i] -eq $ch
False

powershell

来源：https://stackoverflow.com/questions/73490836/how-can-you-use-a-character-comparison-against-a-dash-hyphen-character-in-powers

2条答案

按热度按时间

2admgd591#

如果在搜索中发现这一点并对某人有帮助，请尝试如下所示的比较

[DBG]: PS C:\> [char] 0x2014
—
[DBG]: PS C:\> [char] 0x2013
–
[DBG]: PS C:\> $line[$i] -eq ([char] 0x2014) # em-dash
False
[DBG]: PS C:\> $line[$i] -eq ([char] 0x2013) # en-dash
True

赞(0）回复(0）举报 2022-11-10

os8fio9y2#

标识Unicode字符的新脚本：


# idChar.ps1

param($inputChar)

if (! (test-path $psscriptroot\UnicodeData.txt)) { 
  wget http://www.unicode.org/Public/UNIDATA/UnicodeData.txt -outfile UnicodeData.txt }
$unicode = import-csv $psscriptroot\UnicodeData.txt -Delimiter ';' -Header code,name
$unicode | ? { $inputChar[0] -eq [int]('0x' + $_.code) }

.\idChar –

code name
---- ----
2013 EN DASH

.\idChar —

code name
---- ----
2014 EM DASH

.\idChar -

code name
---- ----
002D HYPHEN-MINUS

此外，还有一个用于破折号的regex Unicode类：

'-','—','–' | select-string '\p{Pd}'

-
—
–

赞(0）回复(0）举报 2022-11-10

我来回答

如何使用PowerShell中的破折号/连字符进行字符比较？

2条答案

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