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I was playing around in the registry the other day and found the PowerShell API lacking in a key area. There does not appear to be a good way to detect the presence of a Registry Name/Value pair. All of the operations such as New, Delete,
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Previously I blogged about PowerShell’s lack of closure support within a script block. This presents a significant hurdle in developing a LINQ like DSL for powershell which I’ve been working on. Imagine the following syntax $a = from it in
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The Take pair of functions are very similar to the Skip functions . The Take expression does essentially the opposite of the Skip functions. Skip is useful for getting elements further down the pipeline. Take is used for getting elements
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Next up in the PowerShell LINQ series is SkipWhile . This LINQ function takes an enumerable instance and a predicate. The function will skip the elements in the enumerable while the predicate is true. The argument to the predicate is
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The PowerShell pipeline, is fairly similar to C#/VB’s LINQ. Both filter a group of elements through a series of transformations which produce a new series of elements. The devil is in the details of course but I’ll get to that in a future
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Script blocks are a concise way of representing an expression or statement group in Powershell. It’s the C#/F#/VB lambda equivalent for PowerShell. One difference between C#/F#/VB lambda expressions and a scriptblock is the lack of lexical
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Script blocks are a powershell construct for storing an expression or group of statements inside an expression. It’s the equivalent of a C#/F#/VB Lamba expression. Recently I needed to use a script block but found I had forgotten how to read
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With all of the great built-in commands for processing pipelines the absence of a good command to count the number of elements in a pipeline seems to stand out. The best built-in way to count the number of objects in a pipeline is to convert the
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I constantly get tripped up in my powershell scripts/commands because I run them against a binary file. In particular when I’m searching through a directory structure looking for a particular string or regex. I’ve found the simplest way to
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Recently I was working on a PowerShell script which involved translating byte arrays into strings using the appropriate encoding. Unfortunately I kept getting the wrong choice for encoding and printed out essentially random data to the console screen.
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As part of my transition into using 64 bit windows I keep running into a problem with some scripts. I have a whole set of Powershell scripts that are dedicated to ensuring certain programs are installed on all of my dev machines. Or that certain
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Recently at work I started using Windows 2008 64 bit edition. Mainly for hyper-v but powershell also comes as part of the deal. I'm starting to work through the fun issues of getting some of my environment specific scripts to run in a 64 bit
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Quick script you can run at login to ensure that your XP machine is being defragmented. I chose 1:00 AM every evening but you can quickly alter that in the script. I have this script run as part of my regular set of configuration scripts to ensure that
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One operation I frequently perform is use a powershell pipeline to filter out a large set of data. Typically I don't care what is in the result but rather is there actually anything left in the pipeline. I can't find a good powershell built-in to perform
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Recently I made a very large update to our code base. Our code base lacked a standard way of guarding entry and exit points into the various components. Having said guards is useful for error handling, tracing, reducing redundancy, etc ...
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