| 1 | | // |
| 2 | | // This is only a SKELETON file for the 'Beer Song' exercise. It's been provided as a |
| 3 | | // convenience to get you started writing code faster. |
| 4 | | // |
| 5 | | |
| 6 | | /** |
| 7 | | * @param {number} initialBottlesCount |
| 8 | | * @param {number} takeDownCount |
| 9 | | * @return {string[]} |
| 1 | /* |
| 2 | * Recites the lyrics to 99 Bottles of Beer on the Wall. |
| 3 | * @param {number} initialBottlesCount - The starting number of bottles (0-99) |
| 4 | * @param {number} takeDownCount - How many verses to recite (default: 1) |
| 5 | * @return {string[]} - Array of lyrics lines |
| 10 | 6 | */ |
| 11 | 7 | export const recite = (initialBottlesCount, takeDownCount = 1) => { |
| 12 | | throw new Error('Remove this line and implement the function'); |
| 13 | | }; |
| 8 | // Edge Case: Invalid input types |
| 9 | if (typeof initialBottlesCount !== 'number' || typeof takeDownCount !== 'number') { |
| 10 | throw new Error('Both parameters must be numbers'); |
| 11 | } |
| 12 | |
| 13 | // Edge Case: Negative numbers |
| 14 | if (initialBottlesCount < 0 || takeDownCount < 0) { |
| 15 | throw new Error('Parameters must be non-negative'); |
| 16 | } |
| 17 | |
| 18 | // Edge Case: takeDownCount is 0 |
| 19 | if (takeDownCount === 0) { |
| 20 | return []; |
| 21 | } |
| 22 | |
| 23 | const result = []; |
| 24 | |
| 25 | for (let i = 0; i < takeDownCount; i++) { |
| 26 | const currentBottles = initialBottlesCount - i; |
| 27 | |
| 28 | // Edge Case: Going below 0 bottles |
| 29 | if (currentBottles < 0) { |
| 30 | break; |
| 31 | } |
| 32 | |
| 33 | // Handle special cases for bottle count |
| 34 | const currentBottleText = currentBottles === 1 ? '1 bottle' : (currentBottles === 0 ? 'no more bottles' : `${currentBottles} bottles`); |
| 35 | const nextBottles = currentBottles - 1; |
| 36 | const nextBottleText = nextBottles === 1 ? '1 bottle' : (nextBottles === 0 ? 'no more bottles' : `${nextBottles} bottles`); |
| 37 | |
| 38 | // Edge Case: Last verse (0 bottles) |
| 39 | if (currentBottles === 0) { |
| 40 | result.push('No more bottles of beer on the wall, no more bottles of beer.'); |
| 41 | result.push('Go to the store and buy some more, 99 bottles of beer on the wall.'); |
| 42 | } else { |
| 43 | // Edge Case: 1 bottle (special grammar) |
| 44 | const action = currentBottles === 1 ? 'Take it down and pass it around' : 'Take one down and pass it around'; |
| 45 | result.push(`${currentBottleText.charAt(0).toUpperCase() + currentBottleText.slice(1)} of beer on the wall, ${currentBottleText} of beer.`); |
| 46 | result.push(`${action}, ${nextBottleText} of beer on the wall.`); |
| 47 | } |
| 48 | |
| 49 | // Edge Case: Add empty string after each verse except the last |
| 50 | if (i < takeDownCount - 1 && currentBottles > 0) { |
| 51 | result.push(''); |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | return result; |
| 56 | // Handled Edge Cases: Invalid input types, negative numbers, takeDownCount is 0, going below 0 bottles, 1 bottle grammar, last verse (0 bottles), empty string between verses |
| 57 | }; |