Merge pull request #4 from SalmaIssa96/week2-js-prep-exercice

SalmaIssa96 · web-flow · commit 2e0ed7904e01 · 2025-02-19T21:58:36.000+01:00
Week2 js prep exercice
diff --git a/Week2/prep-exercises/1-traffic-light/traffic-light.js b/Week2/prep-exercises/1-traffic-light/traffic-light.js
@@ -1,4 +1,4 @@
-"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
@@ -9,6 +9,8 @@ function getCurrentState(trafficLight) {
   // TODO
   // Should return the current state (i.e. colour) of the `trafficLight`
   // object passed as a parameter.
+  const { stateIndex, possibleStates } = trafficLight;
+  return possibleStates[stateIndex];
 }
 
 function getNextStateIndex(trafficLight) {
@@ -17,6 +19,9 @@ function getNextStateIndex(trafficLight) {
   // - if the color is green, it will turn to orange
   // - if the color is orange, it will turn to red
   // - if the color is red, it will turn to green
+  let { stateIndex, possibleStates } = trafficLight;
+  const possibleStatesLength = possibleStates.length;
+  return stateIndex >= possibleStatesLength - 1 ? 0 : ++stateIndex;
 }
 
 // This function loops for the number of seconds specified by the `secs`
@@ -33,13 +38,13 @@ 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.js b/Week2/prep-exercises/2-experiments/index.js
@@ -1,18 +1,22 @@
-"use strict";
+'use strict';
 
-function runExperiment(sampleSize) {
+function runExperiment(sampleSize = 100) {
   const valueCounts = [0, 0, 0, 0, 0, 0];
 
   // TODO
   // Write a for loop that iterates `sampleSize` times (sampleSize is a number).
   // In each loop iteration:
   //
   // 1. Generate a random integer between 1 and 6 (as if throwing a six-sided die).
+
   // 2. Add `1` to the element of the `valueCount` that corresponds to the random
   //    value from the previous step. Use the first element of `valueCounts`
   //    for keeping a count how many times the value 1 is thrown, the second
   //    element for value 2, etc.
-
+  for (let i = 1; i <= sampleSize; i++) {
+    const randomNumber = Math.floor(Math.random() * 6);
+    ++valueCounts[randomNumber];
+  }
   const results = [];
 
   // TODO
@@ -25,12 +29,19 @@ function runExperiment(sampleSize) {
   //    two decimals, e.g. '14.60'.
   // 3. Then push that string onto the `results` array.
 
+  for (const count of valueCounts) {
+    results.push(((count / sampleSize) * 100).toFixed(2));
+  }
   return results;
 }
 
 function main() {
   const sampleSizes = [100, 1000, 1000000];
 
+  for (const size of sampleSizes) {
+    const result = runExperiment(size);
+    console.log(result, size);
+  }
   // TODO
   // Write a for..of loop that calls the `runExperiment()` function for each
   // value of the `sampleSizes` array.
