Comments on: Variables, Arrays, and Hash Tables

By: Scott

Scott — Wed, 01 Feb 2012 16:20:41 +0000

You still have not corrected the error about using +=, in your example after doing $strC = $strA += $strB if you do $StrA you will get “Hello World!”. Please update the tutorial as it is misleading.

By: Lori

Lori — Thu, 26 Jan 2012 22:00:02 +0000

Question…
To add a variable to the Hash Table, we put it in square brackets. To remove it, it was just in parens. Why the difference?

Thanks!!

By: TByrd

TByrd — Fri, 30 Dec 2011 18:55:09 +0000

I am enjoying the tutorials. They are easy to understand, use good examples and have enough material, but not so much as to confuse.
However, I am a little unclear as to when to use the square brackets [], or the curly brackets {} or parens ().
Is there any rule or guide to assist with remembering which to use in which situations?

By: tiMMeH!

tiMMeH! — Thu, 13 Oct 2011 04:48:53 +0000

Awesome tutorial. Really easy to understand and follow

By: Randyl

Randyl — Wed, 31 Aug 2011 23:09:42 +0000

In your ‘Working with Strings’ section, ’string’ is misspelled in the following sentence: “A [sting] is a “text string” data type”.

I hope they didn’t use “sting” as the type.

By: Brian R.

Brian R. — Tue, 16 Aug 2011 15:42:28 +0000

I am trying to parse xml files from database exports to validate data in the database.

How do I get just the tag value when the tag as both attributes and values.

Sample XML

00728cam a22002531 4500
100112

MP 0465.D 01

Here is the code:

$VRPPath = “C:\horizon\horizon-random-sample-formatted.xml”
[xml]$VRLfile = Get-Content $VRPPath
foreach( $record in $VRLfile.collection.record)
{
write-host “leader = “, $record.leader
foreach( $cf in $record.controlfield)
{
write-host “cf tags = “, $cf.tag,” value: “, $cf
$cf
}
}

OutPut:

leader = 01653nam a22002651 4500
cf tags = 001 value:
001 101396
“““““““““
In the second line of the output where the tag has attributes as well as a value, I can get the attribute values just fine but the tag value returned is null or empty.

In the 3rd line of the output, the tag value is returned as a table of attribute and value pairs. I just need the value or text that is stored in the tag without any attribute values.

By: Chuck

Chuck — Fri, 03 Jun 2011 04:19:47 +0000

Bob, Brent: Same problem. Changed to new variable, unused names, and it worked fine.

By: Brian

Brian — Fri, 27 May 2011 15:57:15 +0000

Adding a record to a hash table is described in the section above as:

Add a new employee record:

$EmpNumbers["Rose Jones"] = 445566

How would that work exactly? Rather than adding a record, this looks more like setting a record that has already been added.

By: Brent

Brent — Thu, 14 Apr 2011 19:41:58 +0000

Same Bob. Try this:

$strComputers = @(“Server1″, “Server2″, “Server3″)
$strComputers2 = @(“Server11″, “Server12″, “Server13″)
$strAllComputers = $strComputers + $strComputers2
$strAllComputers

By: Bob

Bob — Fri, 25 Mar 2011 15:54:59 +0000

When trying to complete this part of the tutorial:

Using the + operator, we can combine arrays:
$x = @(1, 2, 3, 4, 5)
$y = @(6, 7, 8, 9, 10)
$z = $x + $y
$z

I get the following error:

Cannot convert the “System.Object[]” value of type “System.Object[]” to type “System.Int32″. $x <<<< = @(1,2,3,4,5)

Thanks,
Bob