Split an array when meets a certain number?

November 23, 2021

Hello I need to return count of chunks in given array of numbers.

Chunk can be defined assequence of one or more numbers separated by one or more zeroes.

Example: array [5, 4, 0, 0, -1, 0, 2, 0, 0] contains 3 chunks

so the answer should be 3 since the array can be split into three chunks.

Can you help me with the solution to this one?

Ive looped through the array but dont know how to deal with the multiple zeros.

>Solution :

You could add a flag for keeping track of counting the actual chunk and rest it only by fing a zero.

let data = [5, 4, 0, 0, -1, 0, 2, 0, 0],
    count = 0,
    lastCount = false;

for (const value of data) {
    if (value === 0) {
        lastCount = false;
        continue;
    }
    if (!lastCount) {
        count++;
        lastCount = true;
    }
}

console.log(count);