September 2024
Intermediate to advanced
1002 pages
23h 43m
German
Content preview from PowerShell Kochbuch, 4. Auflage
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Kapitel 14. Fehlersuche
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14.0 Einleitung
Wenn du Skripte und Funktionen entwickelst, stößt du oft auf ein Verhalten, das du nicht beabsichtigt hast. Das ist ein natürlicher Teil der Softwareentwicklung, und der Weg, diese Probleme zu diagnostizieren, ist die hohe Kunst des Debuggens.
Bei den einfachsten Problemen kann ein gut platzierter Aufruf an Write-Host viele deiner Fragen beantworten. Ist dein Skript an den Stellen angekommen, an denen du es haben wolltest? Wurden die Variablen auf die Werte gesetzt, die du dir vorgestellt hast?
Sobald die Probleme komplexer werden, wird das Debugging im Druckstil schnell mühsam und unhandlich. Anstatt dein Skript ständig zu ändern, um sein Verhalten zu diagnostizieren, kannst du die viel umfangreicheren Debugging-Möglichkeiten der PowerShell nutzen, um das Problem an der Wurzel zu packen:
PS > Set-PsBreakPoint .\Invoke-ComplexDebuggerScript.ps1 -Line 14 ID Script Line Command Variable Action -- ------ ---- ------- -------- ------ 0 Invoke-Comple... 14 PS > .\Invoke-ComplexDebuggerScript.ps1 Calculating lots of complex information 1225 89 Entering debug mode. Use h or ? for help. Hit Line breakpoint on 'Z:\Documents\CookbookV4\chapters\current\PowerShellCookbook\Invoke-Complex DebuggerScript.ps1:14' Invoke-ComplexDebuggerScript.ps1:14 $dirCount = 0 PS > ? s, stepInto Single step (step into functions, scripts, ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.