Print a value from a hashtable in Powershell

Question

I have the following code example. I am just trying to print the value from a hashtable key.

function New-Article()
{
  param ($volume, $issue, $title)

  $article = @{}
  $article.volume = $volume
  $article.issue = $issue
  $article.title = $title

  return $article
}

$article = New-Article(1, 2, "Article Title")
Write-Host "Article title: $article.title" # Output = Article title: System.Collections.Hashtable.title
Write-Host "Article title: $($article.title)" # Output = Article title: 
Write-Host "Article volume: $($article.volume)" # Output = Article volume: 1 2 Article Title

$article = New-Article 1, 2, "Article Title"
Write-Host "Article title: $($article.title)" # Output = Article title:

Edit added a line to test what is mentioned in the possible duplicate (relating to properties, not hashtables)

Edit Added more examples based on comments and answers

Possible duplicate of How can you use an object's property in a double-quoted string? — user4003407
– user4003407, Commented Sep 19, 2018 at 16:49
According to that answer, I can add $() around the variable to print (for properties anyway), that resulted in an empty string when used with a hashtable — steveo225
– steveo225, Commented Sep 19, 2018 at 16:50

zdan · Accepted Answer · 2018-09-19 17:00:11Z

4

You have 2 problems. In addition to enclosing the hashtable property access expression in a $(), you are invoking the function incorrectly. In powershell, arguments are passed to a function separated by spaces, with no brackets:

function New-Article()
{
  param ($volume, $issue, $title)

  $article = @{}
  $article.volume = $volume
  $article.issue = $issue
  $article.title = $title

  return $article
}

$article = New-Article 1 2 "Article Title"
Write-Host "Article title: $($article.title)"

answered Sep 19, 2018 at 17:00

zdan

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2 Comments

steveo225 Over a year ago

When I removed the parenthesis from the call to New-Article, it resulted in the same output

zdan Over a year ago

remove the commas too, the commas tell powershell to create an array.

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