Did you know that you can make a variable automatically propagate to new scopes by using the AllScope option?<\/p>\n
Normally when you enter a new scope variables are not copied from the parent
scope. Instead we do a lookup for the variable when requested. Anytime the
variable is written to it happens in the local scope. This means that it is
possible to hide constant variables in a parent scope which can lead to
programming mistakes. The AllScope option automatically copies the variable
to any new child scope which prevents you from accidentally hiding your
constant variable.<\/p>\n
Example without AllScope:
MSH > function varInScope { new-variable var -value “new value”; $var }
MSH > new-variable var -value “original value” -option Constant
MSH > $var
original value
MSH > varInScope
new value<\/p>\n
Example using AllScope:
MSH > function varInScope { new-variable var -value “new value”; $var }
MSH > new-variable var -value “original value” -option “Constant,AllScope”
MSH > $var
original value
MSH > varInScope
new-variable : A variable with name ‘var’ already exists.
At line:1 char:35
+ function varInScope { new-variable <<<< var -value “new value”; $var }
original value<\/p>\n
-Jeff Jones<\/p>\n
[Edit: Monad has now been renamed to Windows PowerShell. This script or discussion may require slight adjustments before it applies directly to newer builds.<\/i>]<\/p>\n","protected":false},"excerpt":{"rendered":"
Did you know that you can make a variable automatically propagate to new scopes by using the AllScope option? Normally when you enter a new scope variables are not copied from the parent scope. Instead we do a lookup for the variable when requested. Anytime the variable is written to it happens in the local […]<\/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":[],"class_list":["post-11011","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-powershell"],"acf":[],"blog_post_summary":"
Did you know that you can make a variable automatically propagate to new scopes by using the AllScope option? Normally when you enter a new scope variables are not copied from the parent scope. Instead we do a lookup for the variable when requested. Anytime the variable is written to it happens in the local […]<\/p>\n","_links":{"self":[{"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/posts\/11011","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=11011"}],"version-history":[{"count":0,"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/posts\/11011\/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=11011"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/categories?post=11011"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/powershell\/wp-json\/wp\/v2\/tags?post=11011"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}