DAY 5: Template Literals

Hackerrank Solution 10 Days Of Javascript

Objective

In this challenge, we practice using JavaScript Template Literals. Check the attached tutorial for more details.

Task

The code in the editor has a tagged template literal that passes the area and perimeter of a rectangle to a tag function named sides. Recall that the first argument of a tag function is an array of string literals from the template, and the subsequent values are the template's respective expression values.

Complete the function in the editor so that it does the following:

1. Finds the initial values of

and

by plugging the area and perimeter values into the formula:

where

is the rectangle's area and

is its perimeter.

2. Creates an array consisting of

and

and sorts it in ascending order.

3. Returns the sorted array.

Input Format

The first line contains an integer denoting

.
The second line contains an integer denoting

Constraints

Output Format

Return an array consisting of

and

, sorted in ascending order.

Sample Input 0

10
14

Sample Output 0

10
14

Explanation 0

The locked code in the editor passes the following arrays to the tag function:

The value of is [ 'The area is: ', '.\nThe perimeter is: ', '.' ].
The value of is [ 140, 48 ], where the first value denotes the rectangle's area

When we plug those values into our formula, we get the following:
S1=14
S2=10
We then store these values in an array, [14, 10], sort the array, and return the sorted array, [10, 14], as our answer.

SOLUTION

function sides(literals, ...expressions) {
    // ES6 allows destructuring of arrays into multiple variables
    const [a, p] = expressions;
    // Perform this operation only once and assign to variable
    const root = Math.sqrt((p*p)-(16*a))
    const s1 = (p + root)/4;
    const s2 = (p - root)/4;
    // s2 will always be smaller because of the (-/+) above
    return ([s2, s1]);
}


function main() {
    let s1 = +(readLine());
    let s2 = +(readLine());
    
    [s1, s2] = [s1, s2].sort();
    
    const [x, y] = sides`The area is: ${s1 * s2}.\nThe perimeter is: ${2 * (s1 + s2)}.`;
    
    console.log((s1 === x) ? s1 : -1);
    console.log((s2 === y) ? s2 : -1);
}

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DAY 5: Template Literals | Hackerrank Solution | 10 Days Of Javascript