We have an array of numbers like this −
const arr = [-1,-2,-1,0,-1,-2,-1,-2,-1,0,1,0];
We are required to write a JavaScript function that counts the consecutive groups of negative numbers in the array.
Example
The code for this will be −
const arr = [-1,-2,-1,0,-1,-2,-1,-2,-1,0,1,0]; const countClusters = arr => { return arr.reduce((acc, val, ind) => { if(val < 0 && arr[ind+1] >= 0){ acc++; }; return acc; }, 0); }; console.log(countClusters(arr));
Output
The output in the console −
2