What does the symbol do in Powershell

Question

I ve seen the   symbol used in PowerShell to initialise arrays  What exactly does the   symbol denote and where can I read more about it

User · Answer

You can also wrap the output of a cmdlet (or pipeline) in @() to ensure that what you get back is an array rather than a single item.

For instance, dir usually returns a list, but depending on the options, it might return a single object. If you are planning on iterating through the results with a foreach-object, you need to make sure you get a list back. Here's a contrived example:

$results = @( dir c:\autoexec.bat)

One more thing... an empty array (like to initialize a variable) is denoted @().

User · Answer

In PowerShell V2    is also the Splat operator   PS gt    First use it to create a hashtable of parameters  PS gt   params     path    c  temp   Recurse   true  PS gt    Then use it to SPLAT the parameters - which is to say to expand a hash table  PS gt    into a set of command line parameters  PS gt  dir  params PS gt    That was the equivalent of  PS gt  dir -Path c  temp -Recurse  true

User · Answer

PowerShell will actually treat any comma-separated list as an array    server1   server2    So the   is optional in those cases  However  for associative arrays  the   is required      Key   Value   Key2   Value2     Officially    is the  array operator   You can read more about it in the documentation that installed along with PowerShell  or in a book like  Windows PowerShell  TFM   which I co-authored

User · Answer

The Splatting Operator  To create an array  we create a variable and assign the array  Arrays are noted by the     symbol  Let s take the discussion above and use an array to connect to multiple remote computers    strComputers      Server1    Server2    Server3   lt enter gt    They are used for arrays and hashes   PowerShell Tutorial 7  Accumulate  Recall  and Modify Data  Array Literals In PowerShell

User · Answer

You can also wrap the output of a cmdlet (or pipeline) in @() to ensure that what you get back is an array rather than a single item.

For instance, dir usually returns a list, but depending on the options, it might return a single object. If you are planning on iterating through the results with a foreach-object, you need to make sure you get a list back. Here's a contrived example:

$results = @( dir c:\autoexec.bat)

One more thing... an empty array (like to initialize a variable) is denoted @().

User · Answer

In PowerShell V2    is also the Splat operator   PS gt    First use it to create a hashtable of parameters  PS gt   params     path    c  temp   Recurse   true  PS gt    Then use it to SPLAT the parameters - which is to say to expand a hash table  PS gt    into a set of command line parameters  PS gt  dir  params PS gt    That was the equivalent of  PS gt  dir -Path c  temp -Recurse  true

User · Answer

The Splatting Operator  To create an array  we create a variable and assign the array  Arrays are noted by the     symbol  Let s take the discussion above and use an array to connect to multiple remote computers    strComputers      Server1    Server2    Server3   lt enter gt    They are used for arrays and hashes   PowerShell Tutorial 7  Accumulate  Recall  and Modify Data  Array Literals In PowerShell

User · Answer

The Splatting Operator  To create an array  we create a variable and assign the array  Arrays are noted by the     symbol  Let s take the discussion above and use an array to connect to multiple remote computers    strComputers      Server1    Server2    Server3   lt enter gt    They are used for arrays and hashes   PowerShell Tutorial 7  Accumulate  Recall  and Modify Data  Array Literals In PowerShell

User · Answer

PowerShell will actually treat any comma-separated list as an array    server1   server2    So the   is optional in those cases  However  for associative arrays  the   is required      Key   Value   Key2   Value2     Officially    is the  array operator   You can read more about it in the documentation that installed along with PowerShell  or in a book like  Windows PowerShell  TFM   which I co-authored

User · Answer

The Splatting Operator  To create an array  we create a variable and assign the array  Arrays are noted by the     symbol  Let s take the discussion above and use an array to connect to multiple remote computers    strComputers      Server1    Server2    Server3   lt enter gt    They are used for arrays and hashes   PowerShell Tutorial 7  Accumulate  Recall  and Modify Data  Array Literals In PowerShell

User · Answer

PowerShell will actually treat any comma-separated list as an array    server1   server2    So the   is optional in those cases  However  for associative arrays  the   is required      Key   Value   Key2   Value2     Officially    is the  array operator   You can read more about it in the documentation that installed along with PowerShell  or in a book like  Windows PowerShell  TFM   which I co-authored

User · Answer

You can also wrap the output of a cmdlet (or pipeline) in @() to ensure that what you get back is an array rather than a single item.

For instance, dir usually returns a list, but depending on the options, it might return a single object. If you are planning on iterating through the results with a foreach-object, you need to make sure you get a list back. Here's a contrived example:

$results = @( dir c:\autoexec.bat)

One more thing... an empty array (like to initialize a variable) is denoted @().

User · Answer

PowerShell will actually treat any comma-separated list as an array    server1   server2    So the   is optional in those cases  However  for associative arrays  the   is required      Key   Value   Key2   Value2     Officially    is the  array operator   You can read more about it in the documentation that installed along with PowerShell  or in a book like  Windows PowerShell  TFM   which I co-authored

User · Answer

You can also wrap the output of a cmdlet (or pipeline) in @() to ensure that what you get back is an array rather than a single item.

For instance, dir usually returns a list, but depending on the options, it might return a single object. If you are planning on iterating through the results with a foreach-object, you need to make sure you get a list back. Here's a contrived example:

$results = @( dir c:\autoexec.bat)

One more thing... an empty array (like to initialize a variable) is denoted @().

User · Answer

While the above responses provide most of the answer it is useful--even this late to the question--to provide the full answer  to wit   Array sub-expression  see about arrays   Forces the value to be an array  even if a singleton or a null  e g   a     ps   where name -like  foo    Hash initializer  see about hash tables   Initializes a hash table with key-value pairs  e g    HashArguments      Path    test txt   Destination    test2 txt   WhatIf    true    Splatting  see about splatting   Let s you invoke a cmdlet with parameters from an array or a hash-table rather than the more customary individually enumerated parameters  e g  using the hash table just above  Copy-Item  HashArguments  Here strings  see about quoting rules   Let s you create strings with easily embedded quotes  typically used for multi-line strings  e g     data      line one line two something  quoted  here      Because this type of question  what does  x  notation mean in PowerShell   is so common here on StackOverflow as well as in many reader comments  I put together a lexicon of PowerShell punctuation  just published on Simple-Talk com  Read all about   as well as   and   and    and   and more at The Complete Guide to PowerShell Punctuation  Attached to the article is this wallchart that gives you everything on a single sheet

User · Answer

While the above responses provide most of the answer it is useful--even this late to the question--to provide the full answer  to wit   Array sub-expression  see about arrays   Forces the value to be an array  even if a singleton or a null  e g   a     ps   where name -like  foo    Hash initializer  see about hash tables   Initializes a hash table with key-value pairs  e g    HashArguments      Path    test txt   Destination    test2 txt   WhatIf    true    Splatting  see about splatting   Let s you invoke a cmdlet with parameters from an array or a hash-table rather than the more customary individually enumerated parameters  e g  using the hash table just above  Copy-Item  HashArguments  Here strings  see about quoting rules   Let s you create strings with easily embedded quotes  typically used for multi-line strings  e g     data      line one line two something  quoted  here      Because this type of question  what does  x  notation mean in PowerShell   is so common here on StackOverflow as well as in many reader comments  I put together a lexicon of PowerShell punctuation  just published on Simple-Talk com  Read all about   as well as   and   and    and   and more at The Complete Guide to PowerShell Punctuation  Attached to the article is this wallchart that gives you everything on a single sheet

[syntax] What does the "@" symbol do in Powershell?

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