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# Populate hash with array keys and default value

The question asked was: Complete the solution so that it takes an array of keys and a default value and returns a hash with all keys set to the default value.

```def solution(keys, default_value)
hash = Hash.new
keys.each { |k| hash[k] = default_value }
hash
end
```
```keys.each { |k| hash[k] = default_value }
```

Can someone explain what hash[k] = default_value does in the iteration. Thank you!

Hi Lawrence!

Remember you can access the value of a hash by calling it's key right? Like so

Given I have the following hash...

```hash = { 'age' => 30, 'first_name' => 'Nick' }
```

When I pass a key to it with the [] syntax I wan to get the value for that key

```hash['age']
=> 30
```

Likewise we can use the same mechanism to create a new key, value pair into the hash

Given I have the same hash as above

When a pass a value to the [] syntax with a new key I can set it's value; just like creating a normal variable

```hash['last_name'] = 'Fuller'
=> "Fuller"
```

Now using the same logic above I can get that new value from that key

```hash['last_name']
=> "Fuller"
```

And if we look at the entire hash we have

```hash
=> {"age"=>30, "first_name"=>"Nick", "last_name"=>"Fuller"}
```

So your method would work like this...

```candy = ["Skittles", "Starbursts", "Tacos"]

solution(candy, "\$0.99")

=> { "Skittles" => "\$0.99", "Starbursts" => "\$0.99", "Tacos" => "\$0.99" }
```

nick you are freaking awesome! thank you!