|
3 | 3 | function runExperiment(sampleSize) { |
4 | 4 | const valueCounts = [0, 0, 0, 0, 0, 0]; |
5 | 5 |
|
6 | | - // TODO |
7 | | - // Write a for loop that iterates `sampleSize` times (sampleSize is a number). |
8 | | - // In each loop iteration: |
9 | | - // |
10 | | - // 1. Generate a random integer between 1 and 6 (as if throwing a six-sided die). |
11 | | - // 2. Add `1` to the element of the `valueCount` that corresponds to the random |
12 | | - // value from the previous step. Use the first element of `valueCounts` |
13 | | - // for keeping a count how many times the value 1 is thrown, the second |
14 | | - // element for value 2, etc. |
| 6 | + /* |
| 7 | + for (let i = 0; i < sampleSize; i++) { |
| 8 | + const dieValue = Math.floor(Math.random() * 6) + 1; |
| 9 | + valueCounts[dieValue - 1]++; |
| 10 | + */ |
| 11 | + } |
| 12 | + |
| 13 | + |
| 14 | + |
15 | 15 |
|
16 | 16 | const results = []; |
17 | 17 |
|
18 | | - // TODO |
19 | | - // Write a for..of loop for the `valueCounts` array created in the previous |
20 | | - // loop. In each loop iteration: |
21 | | - // 1. For each possible value of the die (1-6), compute the percentage of how |
22 | | - // many times that value was thrown. Remember that the first value of |
23 | | - // `valueCounts` represent the die value of 1, etc. |
24 | | - // 2. Convert the computed percentage to a number string with a precision of |
25 | | - // two decimals, e.g. '14.60'. |
26 | | - // 3. Then push that string onto the `results` array. |
| 18 | +/* |
| 19 | + for (let i = 0; i < valueCounts.length; i++) { |
| 20 | + const percentage = (valueCounts[i] / sampleSize) * 100; |
| 21 | + results.push(percentage.toFixed(2)); |
| 22 | + } |
| 23 | +*/ |
| 24 | + |
27 | 25 |
|
28 | 26 | return results; |
29 | | -} |
| 27 | + |
30 | 28 |
|
31 | 29 | function main() { |
32 | 30 | const sampleSizes = [100, 1000, 1000000]; |
33 | | - |
34 | | - // TODO |
35 | | - // Write a for..of loop that calls the `runExperiment()` function for each |
36 | | - // value of the `sampleSizes` array. |
37 | | - // Log the results of each experiment as well as the experiment size to the |
38 | | - // console. |
39 | | - // The expected output could look like this: |
40 | | - // |
41 | | - // [ '26.00', '17.00', '10.00', '19.00', '16.00', '12.00' ] 100 |
42 | | - // [ '14.60', '17.10', '19.30', '15.50', '16.70', '16.80' ] 1000 |
43 | | - // [ '16.71', '16.68', '16.69', '16.66', '16.67', '16.59' ] 1000000 |
| 31 | +/* |
| 32 | + for (const sampleSize of sampleSizes) { |
| 33 | + const results = runExperiment(sampleSize); |
| 34 | + console.log(results, sampleSize); |
| 35 | + } |
| 36 | +*/ |
| 37 | + |
44 | 38 | } |
45 | 39 |
|
46 | 40 | main(); |
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