Removing spaces from a variable input using PowerShell 4 0

Question

I ve tried a few things already but they don t seem to work for some reason    Basically what I m attempting to do is have a user input a value using the   Read-host  cmdlet  then strip it of any spaces   I tried    answer   read-host  answer replace               And    answer   read-host  answer -replace         I m probably missing something really obvious  but if anyone could help me out or show me an easier way to achieve this I would appreciate it    I was going to pipeline the variable to a command and strip it in that fashion  but none of the examples I ve seen work  although they look much easier

User · Accepted Answer

The Replace operator means Replace something with something else  do not be confused with removal functionality   Also you should send the result processed by the operator to a variable or to another operator  Neither  Replace    nor -replace modifies the original variable   To remove all spaces  use  Replace any space symbol with empty string    string    string -replace   s       To remove all spaces at the beginning and end of the line  and replace all double-and-more-spaces or tab symbols to spacebar symbol  use   string    string -replace     s   s        -replace   s         or the more native System String method   string    string Trim     Regexp is preferred  because     means only  spacebar  symbol  and   s  means  spacebar  tab and other space symbols   Note that  string Replace   does  Normal  replace  and  string -replace does RegEx replace  which is more heavy but more functional   Note that RegEx have some special symbols like dot      braces         slashes      hats      mathematical signs   -  or dollar signs     that need do be escaped     my space com  -replace       -      my-space-com   A dollar sign with a number  ex  1  must be used on a right part with care   2033  -replace    d        Data   1   Data  2033   UPDATE  You can also use  str    str Trim    along with TrimEnd   and TrimStart    Read more at System String MSDN page

User · Answer

You can use    answer replace             or   answer -replace           if you want to remove all whitespace you can use    answer -replace   s

User · Answer

You re close  You can strip the whitespace by using the replace method like this    answer replace          There needs to be no space or characters between the second set of quotes in the replace method  replacing the whitespace with nothing

User · Answer

If the string is    STR    HELLO WORLD    and you want to remove the empty space between  HELLO  and  WORLD    STR replace           replace takes the string and replaces white space with empty string  of length 0   in other words the white space is just deleted

User · Answer

You also have the Trim  TrimEnd and TrimStart methods of the System String class  The trim method will strip whitespace  with a couple of Unicode quirks  from the leading and trailing portion of the string while allowing you to optionally specify the characters to remove    Note there are spaces at the beginning and end Write-Host     This is a test string          This is a test string      Strips standard whitespace Write-Host     This is a test string       Trim     This is a test string      Strips the characters I specified Write-Host     This is a test string       Trim          This is a test string      Now removing   as well Write-Host     This is a test string       Trim              This is a test string    Write-Host     This is a test string       Trim                  This is a test string  Powershell even casts strings to character arrays for you Write-Host     This is a test string       Trim         This is a test string   TrimStart and TrimEnd work the same way just only trimming the start or end of the string

[string] Removing spaces from a variable input using PowerShell 4.0

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