map/reduce local variables

[Albert Shih]

Hi


I try to write a code to delete some key inside a hash. So I got this


$_dataset = reduce($dataset.map |$key, $value| { {$key => delete($value,['remove_key1','remove_key2','remove_key3'])} }) | $result, $value | { deep_merge($result, $value)}

so if

$dataset = {
name1 => {
attr1 =>
attr2 =>
remove_key1 =>
remove_key2 =>
remove_key3 =>
attr3 =>
}
}

it will end up

$_dataset = {
name1 => {
attr1 =>
attr2 =>
attr3 =>
}
}

So it's working.

But why this *not* working ?

class (
Optional[Hash] $remove_key = ['remove_key1','remove_key2','remove_key3'],
)
{

$_dataset = reduce($dataset.map |$key, $value| { {$key => delete($value,$remove_key)} }) | $result, $value | { deep_merge($result, $value)}

}

The problem are some key will be remove, some other not. I'm unable to
understand the difference or find out why it delete some key (event not in
the remove_key array), and keep some other.

Regards.






--
Albert SHIH
DIO bātiment 15
Observatoire de Paris
xmpp: j...@obspm.fr
Heure local/Local time:
Wed 05 Jun 2019 04:57:36 PM CEST

[chengkai liang]

I believed you made thing overly complicated. You only have one hash table, and try to remove the entries that has remove_ of it. Not sure why you need to use reduce and map. You can use `each` to go through first key of the hash table, then use filter to filter out unwanted keys like,

# this class is use to setup owner and group
class reduce_test {
  $hash = {
    attribute1 => 1,
    attribute2 => 2,
    attribute3 => 3,
    remove1    => 4,
    remove2    => 5,
    attribute4 => 6,
    attribute5 => 7,
  }
  notice("hash table => ${hash}")
  $h = $hash.filter | $items | {
    $items[0] !~ /^remove/
  }
  notice("hash table after filtering out 'remove*' key = ${h}")
}

For the each part, I will left for you to figure out.

-CK

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[Albert Shih]

Le 05/06/2019 à 17:09:14+0200, Albert Shih a écrit

> Hi
>
> I try to write a code to delete some key inside a hash. So I got this
>
> $_dataset = reduce($dataset.map |$key, $value| { {$key => delete($value,['remove_key1','remove_key2','remove_key3'])} }) | $result, $value | { deep_merge($result, $value)}
>
> so if
>
> $dataset = {
> name1 => {
> attr1 =>
> attr2 =>
> remove_key1 =>
> remove_key2 =>
> remove_key3 =>
> attr3 =>
> }
> }
>
> it will end up
>
> $_dataset = {
> name1 => {
> attr1 =>
> attr2 =>
> attr3 =>
> }
> }
>
> So it's working.
>
> But why this *not* working ?
>
> class (
> Optional[Hash] $remove_key = ['remove_key1','remove_key2','remove_key3'],
> )
> {
>
> $_dataset = reduce($dataset.map |$key, $value| { {$key => delete($value,$remove_key)} }) | $result, $value | { deep_merge($result, $value)}
>
> }

Why it's not working ? Because I'm stupid. I've be fool by hiera with some
key on other file.

So everything work well.

Regards.

--
Albert SHIH

Observatoire de Paris
xmpp: j...@obspm.fr
Heure local/Local time:

Thu 06 Jun 2019 01:33:12 PM CEST

[Albert Shih]

Le 05/06/2019 à 17:24:26-0700, chengkai liang a écrit

Hi,

Thanks for the help.

> I believed you made thing overly complicated. You only have one hash table, and
> try to remove the entries that has remove_ of it. Not sure why you need to use
> reduce and map. You can use `each` to go through first key of the hash table,
> then use filter to filter out unwanted keys like,
>
> # this class is use to setup owner and group
> class reduce_test {
>   $hash = {
>     attribute1 => 1,
>     attribute2 => 2,
>     attribute3 => 3,
>     remove1    => 4,
>     remove2    => 5,
>     attribute4 => 6,
>     attribute5 => 7,
>   }
>   notice("hash table => ${hash}")
>   $h = $hash.filter | $items | {
>     $items[0] !~ /^remove/
>   }
>   notice("hash table after filtering out 'remove*' key = ${h}")
> }

Well....I understand but it's a example, actually I can't do this with
regexp. Of course I can to it with some very long test.

But I will keep your nice suggestion.

Thanks.

--
Albert SHIH

Observatoire de Paris
xmpp: j...@obspm.fr
Heure local/Local time:

Thu 06 Jun 2019 01:34:24 PM CEST