Delete a nested array from firestore

Question

i have a nested array (arrays inside an array) of frame numbers in which each frame number has its own data. I am not bothered about the frame number right now.

considering the array as [[0-100][100-200][200-300][300-400][400-500]] where [0-100] [100-200] is an array of frame numbers. If i want to delete the [100-200] array, what should I do?

Answer 1

• Use FieldValue.arrayRemove to remove an element from an array by value. The elements can be of Type (*) as mentioned here. The value has to match the whole element in the array, and it will delete all elements in the array that match that value i.e. FieldValue.arrayRemove([100,....200]).

• Use Array.splice. Iterate through each element in array(which is also an array) then array.splice(1,1) which means splicing the array at position 1 for [100-200] and delete count should be 1