How do I filter an array in an array?

• 0
  You need to filter the array from null, which is in another array.
  

  array: [
          {
              "id": "1",
              "name": "test",
              "array2": [
                  null,
                  "666",
                  "99999"
              ]
          },
          {
              "id": "1",
              "name": "test",
              "array2": [
                 null,
                  null,
                  "2222",
                  "5555"
              ]
          }
  ]

  JavaScript Gabriel McCoy, Sep 7, 2020

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1 Answers
• 0

  arr.map(n => ({
  
    ...n,
  
    array2: n.array2.filter(n => n !== null),
  
  }))

  
  
  or, if you don't want to create a new array:
  
  
  
  

  arr.forEach(n => n.array2.reduceRight((_, n, i, a) => n === null && a.splice(i, 1), 0))

  Anonymous

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