Comments on: Essential PowerShell: Know your operator and enclosure precedence http://poshoholic.com/2009/07/08/essential-powershell-know-your-operator-and-enclosure-precedence/ Totally addicted to PowerShell Sat, 05 May 2012 13:03:31 +0000 hourly 1 http://wordpress.com/ By: koenraad http://poshoholic.com/2009/07/08/essential-powershell-know-your-operator-and-enclosure-precedence/#comment-2415 Wed, 27 Apr 2011 13:03:17 +0000 http://kirkmunro.wordpress.com/2009/07/08/essential-powershell-know-your-operator-and-enclosure-precedence/#comment-2415 The same is true for -and and -or
PS> $true -or $true -and $false
False
PS> $true -or ($true -and $false)
True

]]> By: Kirk Munro http://poshoholic.com/2009/07/08/essential-powershell-know-your-operator-and-enclosure-precedence/#comment-2219 Wed, 12 Jan 2011 16:16:08 +0000 http://kirkmunro.wordpress.com/2009/07/08/essential-powershell-know-your-operator-and-enclosure-precedence/#comment-2219 Nice catch, I didn’t pick up that one. You’re right about parentheses though, I use them simply because it eliminates the guesswork for someone reading the script later. Thanks for sharing!

Kirk out.

]]> By: Jeremy Sproat http://poshoholic.com/2009/07/08/essential-powershell-know-your-operator-and-enclosure-precedence/#comment-2218 Wed, 12 Jan 2011 16:02:29 +0000 http://kirkmunro.wordpress.com/2009/07/08/essential-powershell-know-your-operator-and-enclosure-precedence/#comment-2218 There’s a subtle gotcha with the bitwise and logical operators.

AND operators should have a higher precedence than OR operators (much like * happens before +). However, in PowerShell v2.0 (and probably v1.0) -band and -bor are evaluated left to right.

Compare this PowerShell snippet:

PS> 1 -bor 0 -band 0
0

…with Python:

>>> 1 | 0 & 0
1

When in doubt, use parentheses!

]]> By: Aravind http://poshoholic.com/2009/07/08/essential-powershell-know-your-operator-and-enclosure-precedence/#comment-1797 Fri, 20 Aug 2010 02:49:28 +0000 http://kirkmunro.wordpress.com/2009/07/08/essential-powershell-know-your-operator-and-enclosure-precedence/#comment-1797 This is very helpful.

]]> By: Seriál: Windows Powershell - Pasti, chytáky a nechtěná překvapení (část 10.) - TechNet Blog CZ/SK - Site Home - TechNet Blogs http://poshoholic.com/2009/07/08/essential-powershell-know-your-operator-and-enclosure-precedence/#comment-1639 Tue, 15 Jun 2010 18:43:51 +0000 http://kirkmunro.wordpress.com/2009/07/08/essential-powershell-know-your-operator-and-enclosure-precedence/#comment-1639 [...] kdysi experimentálně vytvořil tabulku s prioritou operátorů, můžete se na ni podívat. Možná tam najdete i nějaké doposud neznámé [...]

]]> By: Seriál: Windows Powershell - Tipy a triky (část 10.) - TechNet Blog CZ/SK - Site Home - TechNet Blogs http://poshoholic.com/2009/07/08/essential-powershell-know-your-operator-and-enclosure-precedence/#comment-1637 Mon, 14 Jun 2010 07:22:46 +0000 http://kirkmunro.wordpress.com/2009/07/08/essential-powershell-know-your-operator-and-enclosure-precedence/#comment-1637 [...] kdysi experimentálně vytvořil tabulku s prioritou operátorů, můžete se na ni podívat. Možná tam najdete i nějaké doposud neznámé [...]

]]> By: Episode 77 – Edward Haletky Talks About VMware « PowerScripting Podcast http://poshoholic.com/2009/07/08/essential-powershell-know-your-operator-and-enclosure-precedence/#comment-1259 Sun, 19 Jul 2009 20:19:01 +0000 http://kirkmunro.wordpress.com/2009/07/08/essential-powershell-know-your-operator-and-enclosure-precedence/#comment-1259 [...] Munro posted a great article outlining operator and enclosure precedence Possibly related posts: (automatically generated)Episode 76 – Don Jones on SecurityEpisode 55 [...]

]]> By: Kirk Munro http://poshoholic.com/2009/07/08/essential-powershell-know-your-operator-and-enclosure-precedence/#comment-1239 Thu, 09 Jul 2009 18:41:49 +0000 http://kirkmunro.wordpress.com/2009/07/08/essential-powershell-know-your-operator-and-enclosure-precedence/#comment-1239 Thanks for the feedback, I’m glad you like it!

]]> By: stej http://poshoholic.com/2009/07/08/essential-powershell-know-your-operator-and-enclosure-precedence/#comment-1237 Thu, 09 Jul 2009 06:58:21 +0000 http://kirkmunro.wordpress.com/2009/07/08/essential-powershell-know-your-operator-and-enclosure-precedence/#comment-1237 Great, I was always wondering, what’s the precedence of operators. It is very well defined e.g. for C#, but I haven’t found anything for PowerShell.
You saved my time!

]]>