jumpClouds.js

// Complete the jumpingOnClouds function below.
function jumpingOnClouds(cloudList) {
    const SAFE = 0;
    const DANGER = 1;
    let stepCount = 0;
    // loop through the array
    for (
        let i = 0,
        totalSteps = cloudList.length -1;
        i < totalSteps;
        i++
    ) {
        // edge case
        if (i === totalSteps - 1 && cloudList[i] === SAFE) {
            stepCount++;
            i += 1;
        }
        // special case no 2nd step
        else if (cloudList[i + 1] === SAFE && cloudList[i + 2] === undefined) {
            stepCount++;
        }
        // skip 2 safe clouds
        else if (cloudList[i + 1] === SAFE && cloudList[i + 2] === SAFE) {
            // adjust pointer
            i += 1;
            stepCount++;
        }
        // 1st cloud is dangerous
        else if (cloudList[i + 1] === DANGER && cloudList[i + 2] === SAFE) {
            i += 1;
            stepCount++;
        }
        // 2nd cloud is dangerous
        else if (cloudList[i + 1] === SAFE && cloudList[i + 2] === DANGER) {
            stepCount++;
        }
    }
    return stepCount;
}