Question

How to find the starting and ending position of a given value in an integer array in JavaScript

Answer 1

function findStartingEndingPosition(arr, value) {
    let result = Array(2).fill(-1);
 
    for (let i = 0; i < arr.length; i++) {
        if (arr[i] !== value) {
            continue;
        }
 
        if (result[0] === -1) {
            result[0] = i;
        }
         
        result[1] = i;
    }
 
    return result;
}
         
const arr = [1, 3, 4, 9, 7, 7, 8, 8, 8, 10, 11, 8, 8, 17];
const value = 8;
 
const result = findStartingEndingPosition(arr, value);
 
console.log("start: " + result[0]);
console.log("end: " + result[1]);
 
 
 
/*
run:
 
start: 6
end: 12
 
*/

 

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