Prep exercises is completed

Tenzijn · Tenzijn · commit 9d808aabfcba · 2023-10-31T22:42:13.000+01:00
diff --git a/Week2/prep-exercises/1-traffic-light/traffic-light.js b/Week2/prep-exercises/1-traffic-light/traffic-light.js
@@ -1,17 +1,19 @@
-"use strict";
+'use strict';
 /**
  * The `trafficLight` object is now no longer a global variable. Instead,
  * it is defined in function `main()` and passed as a parameter to other
  * functions, as and when needed.
  */
 
 function getCurrentState(trafficLight) {
+  return trafficLight.possibleStates[trafficLight.stateIndex];
   // TODO
   // Should return the current state (i.e. colour) of the `trafficLight`
   // object passed as a parameter.
 }
 
 function getNextStateIndex(trafficLight) {
+  return trafficLight.stateIndex == 2 ? 0 : ++trafficLight.stateIndex;
   // TODO
   // Return the index of the next state of the `trafficLight` such that:
   // - if the color is green, it will turn to orange
@@ -33,13 +35,13 @@ function waitSync(secs) {
 
 function main() {
   const trafficLight = {
-    possibleStates: ["green", "orange", "red"],
+    possibleStates: ['green', 'orange', 'red'],
     stateIndex: 0,
   };
 
   for (let cycle = 0; cycle < 6; cycle++) {
     const currentState = getCurrentState(trafficLight);
-    console.log(cycle, "The traffic light is now", currentState);
+    console.log(cycle, 'The traffic light is now', currentState);
 
     waitSync(1); // Wait a second before going to the next state
     trafficLight.stateIndex = getNextStateIndex(trafficLight);
diff --git a/Week2/prep-exercises/2-experiments/index.html b/Week2/prep-exercises/2-experiments/index.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Dice experimentation</title>
+  </head>
+  <body>
+    <h1>Dice experimentation</h1>
+    <h2>Results :</h2>
+
+    <p id="1"></p>
+    <p id="2"></p>
+    <p id="3"></p>
+    <script src="./index.js"></script>
+  </body>
+</html>
diff --git a/Week2/prep-exercises/2-experiments/index.js b/Week2/prep-exercises/2-experiments/index.js
@@ -1,8 +1,20 @@
-"use strict";
+'use strict';
+// new function is created for code reusable.
+// This function will give you random number from 1 to 6
+function rollDice(min, max) {
+  return Math.floor(Math.random() * (max - min + 1)) + 1;
+}
+
+function percent(diceRolled, totalDiceRoll) {
+  return (diceRolled / totalDiceRoll) * 100;
+}
 
 function runExperiment(sampleSize) {
   const valueCounts = [0, 0, 0, 0, 0, 0];
-
+  for (let index = sampleSize; index > 0; --index) {
+    let result = rollDice(1, 6);
+    valueCounts[result - 1] += 1;
+  }
   // TODO
   // Write a for loop that iterates `sampleSize` times (sampleSize is a number).
   // In each loop iteration:
@@ -14,7 +26,14 @@ function runExperiment(sampleSize) {
   //    element for value 2, etc.
 
   const results = [];
-
+  valueCounts.forEach((rolledDiceCount) => {
+    // console.log(percent(rolledDiceCount, sampleSize));
+    results.push(
+      ` '${parseFloat(percent(rolledDiceCount, sampleSize))
+        .toFixed(2)
+        .toString()}'`
+    );
+  });
   // TODO
   // Write a for..of loop for the `valueCounts` array created in the previous
   // loop. In each loop iteration:
@@ -31,13 +50,24 @@ function runExperiment(sampleSize) {
 function main() {
   const sampleSizes = [100, 1000, 1000000];
 
+  for (let index = 0; index < sampleSizes.length; index++) {
+    console.log(
+      `[ ${runExperiment(sampleSizes[index])} ] ${sampleSizes[index]}`
+    );
+
+    // This just extra to print the result on the webpage
+    document.getElementById(
+      (index + 1).toString()
+    ).innerHTML = `[ ${runExperiment(sampleSizes[index])} ] ${
+      sampleSizes[index]
+    }`;
+  }
   // TODO
-  // Write a for..of loop that calls the `runExperiment()` function for each
-  // value of the `sampleSizes` array.
-  // Log the results of each experiment as well as the experiment size to the
-  // console.
+  // Write a for..of loop
+  // that calls the `runExperiment()` function for each value of the `sampleSizes` array.
+  // Log the results of each experiment as well as the experiment size to the console.
   // The expected output could look like this:
-  //
+
   // [ '26.00', '17.00', '10.00', '19.00', '16.00', '12.00' ] 100
   // [ '14.60', '17.10', '19.30', '15.50', '16.70', '16.80' ] 1000
   // [ '16.71', '16.68', '16.69', '16.66', '16.67', '16.59' ] 1000000
