从 XML 填充 powershell 数组

Question

I'm using Powershell 3.0 and Windows Server 2012

Two arrays populated from an XML file:

$a = @($Data.MessageGroup.Dataset[0].Series[1] | % {$_.Obs} | select TIME_PERIOD, OBS_VALUE)
$b = @($Data.MessageGroup.Dataset[0].Series[3] | % {$_.Obs} | select TIME_PERIOD, OBS_VALUE)

$a has 680 rows of date values in this format: 2015-09-30
$b has 680 rows of values like: 3051.4

I can list the elements from each array individually with no issues. The problem is when I try to join the arrays.

Join the two arrays:

$c = $a, $b

$c[0] lists all of the dates;
$c[1] lists all of the values.
But when I try to join the two arrays it produces nothing.

$c[0]  -join " "

Answer 1

would this work?

$a = @($Data.MessageGroup.Dataset[0].Series[1] | % {$_.Obs} | select TIME_PERIOD, OBS_VALUE)
$b = @($Data.MessageGroup.Dataset[0].Series[3] | % {$_.Obs} | select TIME_PERIOD, OBS_VALUE)
$i=0
$a | % {$_.TIME_PERIOD + " " + $b[$i++].OBS_VALUE}

For example

$a = @(1, 2, 3)
$b = @('a', 'b', 'c')
$i=0
$a | % {"$_ " + $b[$i++]}

Produces

1 a
2 b
3 c