How to check the array within array if the value is the same on the newArray

Question

How I can scan my array within array if there is equal array element. I want to check if its true or false

// the array to be scan 
const array = [
[0, 1, 2],
[3, 4, 5], 
[6, 7, 8],
]

// the new array
const newArray = [0, 1, 2]

Have you checked [how-to-compare-arrays-in-javascript](https://stackoverflow.com/questions/7837456/how-to-compare-arrays-in-javascript)？ — flyingfox, Nov 25 '22 at 06:35
not yet, but my problem is, the array is inside of array so what will I need to do to it in order to compare it — Krune, Nov 25 '22 at 06:40

score 0 · Answer 1 · answered Nov 25 '22 at 06:42

0

You can use every method to check all the items.

array.filter((arr)=>arr.every((item,index)=>newArray[index]===item))

answered Nov 25 '22 at 06:42

Hao-Jung Hsieh

516
4
9

Doesn't work when the `newArray` has same elements at the index but has more elements: `array = [[1]], newArray = [1,2,3]` – adiga Nov 25 '22 at 06:50

score 0 · Accepted Answer · answered Nov 25 '22 at 06:42

Based on anwser from how-to-compare-arrays-in-javascript,you just need to iterate the first array and then compare them

const array = [
[0, 1, 2],
[3, 4, 5], 
[6, 7, 8],
]

// the new array
const newArray1 = [0, 1, 2]
const newArray2 = [0, 1, 3]

const checkArray = (array1,array2) => {
  for(let arr of array1){
   if(arr.length === array2.length && arr.every((v,i) => v === array2[i])){
     return true
   } 
  }
  return false
}

console.log(checkArray(array,newArray1))
console.log(checkArray(array,newArray2))

score 0 · Answer 3 · answered Nov 25 '22 at 06:42

0

run a foreach or for loop with a combination of name.find(x => x.ref === value);
or use array.filter((arr)=>arr.every((item,index)=>newArray[index]===item))

answered Nov 25 '22 at 06:42

Harvir

131
7

Doesn't work when the `newArray` has same elements at the index but has more elements: `array = [[1]], newArray = [1,2,3]` – adiga Nov 25 '22 at 06:50

score 0 · Answer 4 · edited Nov 25 '22 at 06:52

const array = [
  [0, 1, 2],
  [3, 4, 5],
  [6, 7, 8],
];

const newArray = [0, 1, 2]

let isPresent = false;

for (let i = 0; i < array.length; i++) {
  if (JSON.stringify(array[i]) == JSON.stringify(newArray)) {
    isPresent = true
    break
  }
}
console.log(isPresent)

After stringifying the array you are able to compare directly in js and If it matches I changed the boolean value to true.

In case you have any doubts feel free to comment.

How to check the array within array if the value is the same on the newArray

4 Answers4