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Add One More Level Of Nested Arrays In Array Of Arrays With Initial Data JavaScript

- 1 answer

I have the following array of arrays:

    [
      [ '3b5ec76c-a501-4edf-b97c-2526d6d3e147', '1 & 2' ],
      [ '1f7a07f4-45aa-4a35-ad42-d3f187ee804a', '3 & 4' ],
      [ 'c8a4eead-79ee-4d4b-a16d-68723798d338', '5 & 6' ]
    ]

I have to split the second item of every nested array and create two new arrays with them and the first item of a nested array like this:

    [
       [
          [ '3b5ec76c-a501-4edf-b97c-2526d6d3e147', '1' ],
          [ '3b5ec76c-a501-4edf-b97c-2526d6d3e147', '2' ]
       ],
       [
          [ '1f7a07f4-45aa-4a35-ad42-d3f187ee804a', '3' ],
          [ '1f7a07f4-45aa-4a35-ad42-d3f187ee804a', '4' ]
       ],
       [
          [ 'c8a4eead-79ee-4d4b-a16d-68723798d338', '5' ],
          [ 'c8a4eead-79ee-4d4b-a16d-68723798d338', '6' ]
       ]
    ]

I need this kind of nested array because I use it for a bulk insert in nodeJS.

My current method that I am using to create this array looks like this:

    console.log(teams.map(team => {
            let initialArray = []
            let firstPlayer = [uuidv4(), team[0], team[1].split(' & ')[0]]
            let secondPlayer = [uuidv4(), team[0], team[1].split(' & ')[1]] 
    
            data = (initialArray.concat(firstPlayer)).concat(secondPlayer)
    
            return data
        }))

And the response is like that:

    [
      [
        'da4d27fb-06e3-4075-aaba-be799d793bbd',
        '3b5ec76c-a501-4edf-b97c-2526d6d3e147',
        '1',
        'df869f69-76fb-41bc-af59-f86c1c623cfb',
        '3b5ec76c-a501-4edf-b97c-2526d6d3e147',
        '2'
      ],
      [
        'fb7c5620-6f20-4586-a82a-30c0ea39022e',
        '1f7a07f4-45aa-4a35-ad42-d3f187ee804a',
        '3',
        '1d30d9d7-3d63-4309-a7d3-5bc6abe17500',
        '1f7a07f4-45aa-4a35-ad42-d3f187ee804a',
        '4'
      ],
      [
        '433159a1-ee21-4f91-ae6e-69fb359b747b',
        'c8a4eead-79ee-4d4b-a16d-68723798d338',
        '5',
        '8321a976-9bae-408d-810b-f5508012d58e',
        'c8a4eead-79ee-4d4b-a16d-68723798d338',
        '6'
      ]
    ]

I have also tried a method using reduce found in this stackoverflow question: Return multiple arrays using "map" function

If somebody knows a method for this, or you need further explanations, let me know.

Thank you!

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Answer

Try this approach

const data = [[ '3b5ec76c-a501-4edf-b97c-2526d6d3e147', '1 & 2' ],[ '1f7a07f4-45aa-4a35-ad42-d3f187ee804a', '3 & 4' ],[ 'c8a4eead-79ee-4d4b-a16d-68723798d338', '5 & 6' ]];

const result = data.map(([guid, teams]) => {
    const [team1, team2] = teams.split(' & ');
    return [[guid, team1], [guid, team2]];
});

console.log(result);
.as-console-wrapper{min-height: 100%!important; top: 0}

Same result but with oneliner

const data = [[ '3b5ec76c-a501-4edf-b97c-2526d6d3e147', '1 & 2' ],[ '1f7a07f4-45aa-4a35-ad42-d3f187ee804a', '3 & 4' ],[ 'c8a4eead-79ee-4d4b-a16d-68723798d338', '5 & 6' ]];

const result = data.map(([guid, teams]) => teams.split(' & ').map((team) => [guid, team]));

console.log(result);
.as-console-wrapper{min-height: 100%!important; top: 0}

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source: stackoverflow.com
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