Hi All

I'm struggling with something that seems simple, so what am I missing?

I want to have an array (or hash) of hashtables, then to foreach through the
array and pull out information. Here's an example:

$a = @{}
$a[1] = @{field1="a";field2="b"}
$a[2] = @{field1="c";field2="d"}
$a[3] = @{field1="e";field2="f"}

I want to be able to:

foreach ($b in $a) {
"Field1: $($b.field1)"
"Field2: $($b.field2)"
"--------------------"
}

I desire:

Field1: a
Field2: b
Field1: c
Field2: d
Field1: e
Field2: f

But I get:

Field1:
Field2:
--------------------

What am I doing wrong?

Thanks.

altraf

When you foreach through a hash you need to either foreach throught he keys
or the values.

foreach($b in $a.keys){}
or
foreach($b in $a.values){}

Brandon Shell
---------------
Blog: http://www.bsonposh.com/
PSH Scripts Project: www.codeplex.com/psobject

A> Hi All
A>
A> I'm struggling with something that seems simple, so what am I
A> missing?
A>
A> I want to have an array (or hash) of hashtables, then to foreach
A> through the array and pull out information. Here's an example:
A>
A> $a = @{}
A> $a[1] = @{field1="a";field2="b"}
A> $a[2] = @{field1="c";field2="d"}
A> $a[3] = @{field1="e";field2="f"}
A> I want to be able to:
A>
A> foreach ($b in $a) {
A> "Field1: $($b.field1)"
A> "Field2: $($b.field2)"
A> "--------------------"
A> }
A> I desire:
A>
A> Field1: a
A> Field2: b
A> Field1: c
A> Field2: d
A> Field1: e
A> Field2: f
A> But I get:
A>
A> Field1:
A> Field2:
A> --------------------
A> What am I doing wrong?
A>
A> Thanks.
A>
A> altraf
A>

altraf,

Use $a.Values

PS > $a.Values

Name Value
---- -----
field1 e
field2 f
field1 c
field2 d
field1 a
field2 b



Another way is to use hashtables nested in array elements, I believe it gives
the output you want:

$a = @()
$a+= @{field1="a";field2="b"}
$a+= @{field1="c";field2="d"}
$a+= @{field1="e";field2="f"}

PS > $a

Name Value
---- -----
field1 a
field2 b
field1 c
field2 d
field1 e
field2 f


foreach($b in $a){
"Field1: $($b.field1)"
"Field2: $($b.field2)"
}


Field1: a
Field2: b
Field1: c
Field2: d
Field1: e
Field2: f



-----
Shay Levi
$cript Fanatic
http://scriptolog.blogspot.com
Hebrew weblog: http://blogs.microsoft.co.il/blogs/scriptfanatic

> Hi All
>
> I'm struggling with something that seems simple, so what am I missing?
>
> I want to have an array (or hash) of hashtables, then to foreach
> through the array and pull out information. Here's an example:
>
> $a = @{}
> $a[1] = @{field1="a";field2="b"}
> $a[2] = @{field1="c";field2="d"}
> $a[3] = @{field1="e";field2="f"}
> I want to be able to:
>
> foreach ($b in $a) {
> "Field1: $($b.field1)"
> "Field2: $($b.field2)"
> "--------------------"
> }
> I desire:
>
> Field1: a
> Field2: b
> Field1: c
> Field2: d
> Field1: e
> Field2: f
> But I get:
>
> Field1:
> Field2:
> --------------------
> What am I doing wrong?
>
> Thanks.
>
> altraf
>

On Dec 10, 10:31 am, Altraf <Alt...@xxxxxx> wrote:

> Thanks Brandon and Shay, I used foreach($b in $a.values){} and it worked great.
>
> altraf

Altraf,

Just so you know, Shay's script is subtly different - he's really
creating an _array_ of hashtables. You, on the other hand, have
created a hashtable of hashtables. The difference is:

$a = @{} # curly braces, hashtable

versus

$a = @() # parentheses, array.

- Oisin / x0n

Oisin

After a bit of reading up I became aware of the difference. Initially I was
trying to output the identifier of the hashtables via a label, so my output
would look like:

Hash: 1
Field1: a
Field2: b
Hash: 2
Field1: c
Field2: d
Hash: 3
Field1: e
Field2: f

Actually I don't really need the name, but was interested in how to get it,
But never got it working. That's why I was trying to use a parent hashtable.

As it happens Shay's way of doing it with a parent array instead of a parent
hashtable proved slightly simpler, so I went with it.

Thanks

altraf