Ruby delete specific value from hash and replace with another value

Question

Is there a clear way to loop through the hash below and replace the specific value(s) with the value(s) in the 'Fills' array?

codes = ['AA', 'BB']
fills = ['FOUR', 'FIVE']

This empty hash gets populated by an 'each do' statement where is picks out the info from 'main_hash' based on the keys in the 'codes' array.

hash = {}

main_hash = {'AA' => ['1', 'TEXT', 'ONE'],
             'BB' => ['2', 'TEXT', 'TWO'],
             'CC' => ['3', 'TEXT', 'THREE']}

Ouput: I want to replace the specific value in the new 'hash' so the output looks like below:

hash = {'AA' => ['1', 'TEXT', 'FOUR'],
        'BB' => ['2', 'TEXT', 'FIVE']}

Yurii Stefaniuk · Accepted Answer · 2022-06-20 17:34:30Z

1

Possible solution:

# Input
fills = ['FOUR', 'FIVE', 'SIX']

hash = {
  'AA' => ['1', 'ONE'],
  'BB' => ['2', 'TWO'],
  'CC' => ['3', 'THREE']
}

hash.transform_values { |i, _| [i, fills[i.to_i - 1]] }

# output

{
  'AA' => ['1', 'FOUR'],
  'BB' => ['2', 'FIVE'],
  'CC' => ['3', 'SIX']
}

Update:

As your incoming data is changed the solution will be:

h = {"AA"=>["1", "FOUR"], "BB"=>["2", "FIVE"]}

h.transform_values { |x| x.insert(1, 'TEXT') }

# Output

{
  'AA' => ['1', 'TEXT', 'FOUR'], 
  'BB' => ['2', 'TEXT', 'FIVE']
}

edited Jun 20, 2022 at 17:34

answered Jun 20, 2022 at 15:03

Yurii Stefaniuk

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4 Comments

Ceesar Over a year ago

Thanks, I did manage to get it working but made a slight change. If you look at the code now whenever I try your solution I get the following: {"AA"=>["1", "FOUR"], "BB"=>["2", "FIVE"]}. I want to display hash = {'AA' => ['1', 'TEXT', 'FOUR'], 'BB' => ['2', 'TEXT', 'FIVE']} as the output. Thanks.

Yurii Stefaniuk Over a year ago

You provided totally new values

Ceesar Over a year ago

Yeah sorry, I should have made it clear the first time.

Yurii Stefaniuk Over a year ago

You need to update you question not completely change it. I updated my answer

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