A user on the newsgroup wondered whether the example below highlighted a bug or a feature. They applied multiple type declarations on a single parameter and Windows PowerShell did not complain.<\/p>\n
function check { That’s no bug, that’s a feature. \ud83d\ude42<\/p>\n This is an example of chained type casting. There are all sorts of examples where this is useful. Consider the following:<\/p>\n PS> “PowerShell” Enjoy!<\/p>\n Jeffrey Snover [MSFT] PSMDTAG:FAQ: What are cascading type casts?<\/p>\n PSMDTAG:DOTNET: [char[]]<\/p>\n","protected":false},"excerpt":{"rendered":" A user on the newsgroup wondered whether the example below highlighted a bug or a feature. They applied multiple type declarations on a single parameter and Windows PowerShell did not complain. function check { param([string] [int] $y = 0, $x = 0)###^^^^^^^^^^^^ $x.GetType().ToString(); $y.GetType().ToString(); $x + $y;} That’s no bug, that’s a feature. \ud83d\ude42 […]<\/p>\n","protected":false},"author":600,"featured_media":13641,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[14,10],"class_list":["post-10001","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-powershell","tag-dotnet","tag-faq"],"acf":[],"blog_post_summary":" A user on the newsgroup wondered whether the example below highlighted a bug or a feature. They applied multiple type declarations on a single parameter and Windows PowerShell did not complain. function check { param([string] [int] $y = 0, $x = 0)###^^^^^^^^^^^^ $x.GetType().ToString(); $y.GetType().ToString(); $x + $y;} That’s no bug, that’s a feature. \ud83d\ude42 […]<\/p>\n","_links":{"self":[{"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/posts\/10001","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/users\/600"}],"replies":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/comments?post=10001"}],"version-history":[{"count":0,"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/posts\/10001\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/media\/13641"}],"wp:attachment":[{"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/media?parent=10001"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/categories?post=10001"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/tags?post=10001"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
param([string] [int] $y = 0, $x = 0)
###^^^^^^^^^^^^
$x.GetType().ToString();
$y.GetType().ToString();
$x + $y;
}<\/font><\/p>\n
<\/strong>PowerShell
PS> [int[]]”PowerShell”
<\/strong>Cannot convert value “PowerShell” to type “System.Int32[]”. Error: “Invalid
cast from ‘System.String’ to ‘System.Int32[]’.”
At line:1 char:8
+ [int[]]” <<<< PowerShell”
<\/font>PS> [char[]]”PowerShell”
<\/strong>P
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PS> [int[]][char[]]”PowerShell”
<\/strong>80
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PS> [char[]][int[]][char[]]”PowerShell”
<\/strong>P
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PS> [string][char[]][int[]][char[]]”PowerShell”
<\/strong>P o w e r S h e l l
PS><\/font><\/p>\n
Windows PowerShell\/Aspen Architect
Visit the Windows PowerShell Team blog at: http:\/\/blogs.msdn.com\/PowerShell<\/a>
Visit the Windows PowerShell ScriptCenter at: http:\/\/www.microsoft.com\/technet\/scriptcenter\/hubs\/msh.mspx<\/a><\/p>\n