Is it possible to create an array of hashes

[Raghu Ram Baisani]

Hi Guys

Some one help me solving this issue.

Example:

[
    {
        name => raghuram,
        age  => 22
    },
    {
        name => vinay
        age  => 25
    }
]

the idea is to iterate through an existing hash and create new hash with some modifications and add it to array.

Thanks in advance

[Benjamin Ridley]

Hi Raghu,

Yes this is possible. Your example looks workable, but don't forget to add commas after the values of the hash. 

Check out Puppet's 'reduce' function, it iterates over data and allows you to return a new structure after all the iteration which could be your new hash. Alternatively it might be worth writing something in Ruby if Puppet's immutable variables get in the way which may happen if you're heavily modifying your hash. 

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[Raghu Ram Baisani]

Thanks for the reply.

I didn't understand what you are trying to say.
The code is something like this:

$array_inputs = []

$vm_data.each |$region| {

$hash_region = {

 location => $region['location'],

 vm_list  => $region['vmlist'],

 customer_id => "customer-${$region['location']}",

api_key => "api-${$region['location']}",

secret_key => "secret-${$region['location']}",

}

 $array_inputs <<  $hash_region

}

return $array_inputs

}

I'm not able to add a new hash into the array after every iteration.

Can you please provide some resolution for this.

Thanks in advance

Raghuram Baisani

[Jesse Reynolds]

Hi Raghu, 

It sounds like you want to use the map function: https://puppet.com/docs/puppet/6.17/function.html#map 

Here's an example of how to use it with your data structure: 

$array_inputs = $vm_data.map |$region| {

  $hash_region = {
    location    => $region['location'],
    vm_list     => $region['vmlist'],
  }
}

I have pulled out the following lines though, as the variable name interpolation within a variable name is probably not going to work how you're expecting it to:

    customer_id => "customer-${$region['location']}",
    api_key     => "api-${$region['location']}",
    secret_key  => "secret-${$region['location']}",

For those lookups you are probably best off creating a separate lookup hash perhaps like this:

$region_data = {
  'apac' => {
    'customer_id' => 'xxx',
    'api_key'     => 'yyy',
    'secret_key'  => 'zzz',
  }
}

customer_id => "customer-${region_data['apac']['customer_id']}"

Cheers

Jesse

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--

Jesse Reynolds

Principal Professional Services Engineer

Melbourne, Australia

mobile: +61 414 669 790

jesse.r...@puppet.com

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