at least one of the value's in the array1 obj "data" array matches the "data" array in array2 object
> array1
array1 = [
{
id: '1',
name: 'ron',
data: ['p1']
},
{
id: '2',
name: 'lon',
data: ['p2']
},
{
id: '3',
name: 'voon',
data: ['p4']
}
];
> array2
array2 = [
{
id: '1',
name: 'fgr',
data:['p1','p2','p3']
},
{
id: '2',
name: 'gone',
data:['p1','p2','p3']
}
]
output: { id: '1', name: 'ron', data: ['p1'] }, { id: '2', name: 'lon', data: ['p2'] }
With the below assumption:
array1 has objects each of which always have prop data which is an arrayarray2 also has objects and these objects will always have prop data which is an array as wellarray1 whose data have at least one common element with any of the data of array2 objects.this solution may work:
const findNeedleInHaystack = (needle = array1, haystack = array2) => (
needle.reduce((acc, itm) => (
haystack
.map(x => x.data)
.flat()
.some(x => itm.data.includes(x))
? [...acc, itm]
: [...acc]
), [])
);
Explanation
needle array (ie, array1) using .reduce.map on haystack array (ie, array2) to separate the data from each object.flat() to transform the 2-dimensional resulting array into 1-dimension.some to see if any element in the 1-dimensional array is also present in itm's data arrayitm to the result (using ... spread operator on acc - the aggregator/accumulator)itm.Code Snippet
const array1 = [
{
id: '1',
name: 'ron',
data: ['p1']
},
{
id: '2',
name: 'lon',
data: ['p2']
},
{
id: '3',
name: 'voon',
data: ['p4']
}
];
const array2 = [
{
id: '1',
name: 'fgr',
data:['p1','p2','p3']
},
{
id: '2',
name: 'gone',
data:['p1','p2','p3']
}
];
const findNeedleInHaystack = (needle = array1, haystack = array2) => (
needle.reduce((acc, itm) => (
haystack.map(x => x.data).flat().some(x => itm.data.includes(x))
? [...acc, itm]
: [...acc]
), [])
);
console.log(findNeedleInHaystack());