intersect

async def intersect(arrA: str, arrB: str) -> List[str] | List[int]

Param	Description
name	Name of the array
arrA	First array to intersect
arrB	Second array to intersect

Intersects arrA with arrB.

Array Type Differences

• Only applies to sorted arrays

Raises

• ResponseError if query fails
  • arrA does not exist
  • arrB does not exist
• ValueError caught before query is sent
  • arrA is empty
  • arrB is empty
  • arrA == arrB

Examples

client = NdbClient()
await client.open('ws://127.0.0.1:1987/')

sortedInts = SortedIntArrays(client)
await sortedInts.create('array1', 5)
await sortedInts.create('array2', 6)

await sortedInts.set_rng('array1', [25,10,50,100,80])
await sortedInts.set_rng('array2', [10,25,100,120,200,5])

intersected = await sortedInts.intersect('array1', 'array2')
print(intersected)

Output

[10, 25, 100]

async def createData(s: int, size: int):
    from random import sample, seed
    seed(s)
    return sample(range(0, size*4), size)


client = NdbClient()
connect = client.open('ws://127.0.0.1:1987/')

print('Creating data') 
data1 = await createData(7,500)
data2 = await createData(9,500)

await connect

sortedInts = SortedIntArrays(client)

print('Creating arrays') 
await sortedInts.create('array1', 500)
await sortedInts.create('array2', 500)

print('Storing data')
await sortedInts.set_rng('array1', data1)
await sortedInts.set_rng('array2', data2)

print('Intersecting')
intersected = await sortedInts.intersect('array1', 'array2')
print(f'Intersected has: {len(intersected)} values')