What s the PowerShell syntax for multiple values in a switch statement

Question

I basically want to do this   switch  someString ToLower           y    yes     You entered Yes         default    You entered No

User · Answer

I found that this works and seems more readable:

switch($someString)
{
    { @("y", "yes") -contains $_ } { "You entered Yes." }
    default { "You entered No." }
}

The "-contains" operator performs a non-case sensitive search, so you don't need to use "ToLower()". If you do want it to be case sensitive, you can use "-ccontains" instead.

User · Answer

After searching a solution for the same problem like you  I ve found this small topic here  In advance I got a much smoother solution for this switch  case statement  switch  someString   switch is caseINsensitive  so you don t need to lower          y  -or  yes       You entered Yes         default    You entered No

User · Answer

Supports entering y ye yes and case insensitive   switch -regex   someString ToLower                y es                     You entered Yes                      default    You entered No

User · Answer

You should be able to use a wildcard for your values   switch -wildcard   someString ToLower           y      You entered Yes         default    You entered No         Regular expressions are also allowed   switch -regex   someString ToLower           y es       You entered Yes         default    You entered No         PowerShell switch documentation  Using the Switch Statement

User · Answer

switch  someString ToLower           yes            y         y         You entered Yes         default    You entered No         You can arbitrarily branch  cascade  and merge cases in this fashion  as long as the target case is located below after the case or cases where the    variable is respectively reassigned     n b  As cute as this behavior is  it seems to reveal that the PowerShell interpreter is not implementing switch case as efficiently as one might hope or assume  For one  stepping with the ISE debugger suggests that instead of optimized lookup  hashing  or binary branching  each case is tested in turn  like so many if-else statements   If so  consider putting your most common cases first   Also  as shown in this answer  PowerShell continues testing cases after having satisfied one  And cruelly enough  there even happens to be a special optimized  switch  opcode available in  NET CIL which  because of this behavior  PowerShell can t take advantage of

User · Answer

switch  someString ToLower                 -eq  y   -or     -eq  yes       You entered Yes          default    You entered No

User · Answer

The switch doesn t appear to be case sensitive in PowerShell 5 1  All four of the  someString examples below work     someString    YES   someString    yes   someString    yEs   someString    y   switch   someString         y   yes      You entered Yes        Default    You didn t enter Yes        Here is my  PSVersionTable data   Name                           Value ----                           ----- PSVersion                      5 1 17763 771 PSEdition                      Desktop PSCompatibleVersions            1 0  2 0  3 0  4 0     BuildVersion                   10 0 17763 771 CLRVersion                     4 0 30319 42000 WSManStackVersion              3 0 PSRemotingProtocolVersion      2 3 SerializationVersion           1 1 0 1

User · Answer

A slight modification to derekerdmann s post to meet the original request using regex s alternation operator     pipe    It s also slightly easier for regex newbies to understand and read   Note that while using regex  if you don t put the start of string character     caret circumflex  and or end of string character     dollar  then you may get unexpected unintuitive behavior  like matching  yesterday  or  why     Putting grouping characters      parentheses  around the options reduces the need to put start and end of string characters for each option  Without them  you ll get possibly unexpected behavior if you re not savvy with regex  Of course  if you re not processing user input  but rather some set of known strings  it will be more readable without grouping and start and end of string characters   switch -regex   someString   many have noted ToLower   here is redundant            processing user input        y yes indubitably       You entered Yes                not processing user input      y yes indubitably     Yes was the selected string         default    You entered No

[powershell] What's the PowerShell syntax for multiple values in a switch statement?

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