Searching for data in arrays [Node.JS]

Question

I have a question: (sorry for the bad formatting)

I have an array:

[
    {
        "data": [
            [
                "kek",
                "lol"
            ],
            [
                "notkek",
                "notlol"
            ]
        ]
    }
]

If someone writes "kek" it should search it in the "data" array and return the "kek" position inside its array (["kek","lol"])

and its array position

{
    "data": [
        [
            "kek",
            "lol"
         ]}

(in this case "data[0]")

If anybody knows the answer, please help me

Orelsanpls · Accepted Answer · 2018-09-11 15:11:28Z

1

The method Array.findIndex and Array.includes may help you

const obj = {
  data: [
    [
      'kek',
      'lol'
    ],
    [
      'notkek',
      'notlol'
    ],
  ],
};

const keyToSearch = 'kek';

// We look for the key
const index = obj.data.findIndex(x => x.includes(keyToSearch));

if (index === -1) {
  console.log(`We didn't found ${keyToSearch}`);
} else {
  console.log(`We found ${keyToSearch} at index ${index}`);
}

Double index recuperation

const obj = {
  data: [
    [
      'kek',
      'lol'
    ],
    [
      'notkek',
      'notlol'
    ],
    [
      'notkek',
      'notlol',
      'otherstuff',
      'kek',
      'test',
    ],
  ],
};

const keyToSearch = 'kek';

const ret = obj.data.reduce((tmp, x, xi) => {
  // We look for the key
  const index = x.findIndex(y => y === keyToSearch);

  if (index === -1) return tmp;

  return [
    ...tmp,

    {
      absoluteIndex: xi,
      relativeIndex: index,
    },
  ];
}, []);


if (!ret.length) {
  console.log(`We didn't found ${keyToSearch}`);
} else {
  ret.forEach(({
    absoluteIndex,
    relativeIndex,
  }) => console.log(
    `We found ${keyToSearch} at`,
    `data index ${absoluteIndex}, in ${relativeIndex} position`,
  ));
}

edited Sep 11, 2018 at 15:11

answered Sep 11, 2018 at 14:36

Orelsanpls

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2 Comments

Dndrhead Over a year ago

but what if I need to find not only index of query inside the big array, but also in this array [ 'kek', 'lol' ] so If it found the index in big array also search in the array that it found (for examle "kek" is at index 0 at smaller array)

Orelsanpls Over a year ago

I've made an edit, where you can extract in which data index the key is and in which position

Steve Bohmbach · Accepted Answer · 2018-09-11 14:38:24Z

0

userInput = 'kek'
  let item = data.map((item, indx) => {
     item.includes(userInput) ? return({"indx":indx,"nestedIndex":item.indexOf(userInput)}) : null
   })

map over the data array and if the nested array had the item your searching for than return the index of the array and the index of the item with in that array

edited Sep 11, 2018 at 14:38

answered Sep 11, 2018 at 14:33

Steve Bohmbach

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