Learn Tutorial Async code

[ErnstRosser]

Page URL

https://dart.dev/learn/tutorial/async

Page source

https://github.com/dart-lang/site-www/blob/main/src/content/learn/tutorial/async.md

Describe the problem

PS C:\Coding\dartpedia\cli> dart bin/cli.dart search Flutter_(Software)
Software : Die Benennung "Software" wurde nicht als Name eines Cmdlet, einer Funktion,
einer Skriptdatei oder eines ausführbaren Programms erkannt. Überprüfen Sie die
Schreibweise des Namens, oder ob der Pfad korrekt ist (sofern enthalten), und
wiederholen Sie den Vorgang.
In Zeile:1 Zeichen:35

• dart bin/cli.dart search Flutter_(Software)

•                               ~~~~~~~~
  

  • CategoryInfo : ObjectNotFound: (Software:String) [], CommandNotFoundExcep
    tion
  • FullyQualifiedErrorId : CommandNotFoundException

PS C:\Coding\dartpedia\cli> dart bin/cli.dart search Flutter
Looking up articles about "Flutter". Please wait.
https://en.wikipedia.org/api/rest_v1/page/summary/Flutter
{"type":"disambiguation","title":"Flutter","displaytitle":"<span lang="en" dir="ltr"><span class="mw-page-title-main">Flutter","namespace":{"id":0,"text":""},"wikibase_item":"Q46572","titles":{"canonical":"

Expected fix

Why do I get an error here as soon as I put a part of the argument in parenthesis?

Additional context

No response

I would like to fix this problem.

• I will try and fix this problem on dart.dev.

[julemand101]

Why do I get an error here as soon as I put a part of the argument in parenthesis?

Parentheses often have a meaning for the terminal emulator you are using. I can see from your example you are using PowerShell and it does use parentheses for wrapping sub-commands. Therefore when you do:

PS C:\Coding\dartpedia\cli> dart bin/cli.dart search Flutter_(Software)

PowerShell will fail (the error you are getting) since it does not understand what you mean by (Software) which it tries execute as a sub-command before serving the result to the Dart command you are executing.

If you read https://dart.dev/learn/tutorial/async#task-6-run-the-application in closer details, it puts quotes around the last argument:

dart run bin/cli.dart wikipedia "Dart_(programming_language)"

Which is exactly added here to make sure PowerShell does not try parse the parentheses but instead sends the full Dart_(programming_language) as argument to the Dart process without any further interpretation.