# Day 3

## Arrays

{% embed url="<https://www.hackerrank.com/challenges/js10-arrays/problem?isFullScreen=true>" %}

```javascript
/**
*   Return the second largest number in the array.
*   @param {Number[]} nums - An array of numbers.
*   @return {Number} The second largest number in the array.
**/
function getSecondLargest(nums) {
    // Complete the function
    let firstLargest = 0;
    let secondLargest = 0;
    for (let i = 0; i < nums.length; i++){
        if(nums[i] > firstLargest){
            secondLargest = firstLargest;
            firstLargest = nums[i];
        }
        if(nums[i] < firstLargest && nums[i] > secondLargest){
            secondLargest = nums[i];
        }            
    }
    return secondLargest;
}
```

## Try, Catch, and Finally

{% embed url="<https://www.hackerrank.com/challenges/js10-try-catch-and-finally/problem?isFullScreen=true>" %}

```javascript
/*
 * Complete the reverseString function
 * Use console.log() to print to stdout.
 */
function reverseString(s) {
    try{
        s = s.split('').reverse().join('');
    }
    catch(e){
        console.log(e.message);
    }
    finally{
        console.log(s);
    }
}
```

## Throw

{% embed url="<https://www.hackerrank.com/challenges/js10-throw/problem?isFullScreen=true>" %}

```javascript
/*
 * Complete the isPositive function.
 * If 'a' is positive, return "YES".
 * If 'a' is 0, throw an Error with the message "Zero Error"
 * If 'a' is negative, throw an Error with the message "Negative Error"
 */
function isPositive(a) {
    if(a > 0)
        return "YES";
    else if(a == 0)
        throw new Error("Zero Error");
    else
        throw new Error("Negative Error");
}
```


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