Samira exercises

Week1/practice-exercises/1-remove-the-comma.js

@@ -7,6 +7,10 @@
 
 let myString = 'hello,this,is,a,difficult,to,read,sentence';
 
+myString = myString.split(',').join(' ');
+
+console.log(myString); 
+
 
 
 /* --- Code that will test your solution, do NOT change. Write above this line --- */

Week1/practice-exercises/2-even-odd-reporter.js

@@ -7,3 +7,11 @@
  *  If it's even, log to the console The number [PUT_NUMBER_HERE] is even!.
  */
 
+for (let i = 0; i <= 20; i++) {
+
+    if (i % 2 === 0) {
+        console.log(`The number ${i} is even!`);
+    } else {
+        console.log(`The number ${i} is odd!`);
+    }
+}

Week1/practice-exercises/3-recipe-card.js

@@ -12,3 +12,12 @@
  *   Ingredients: 4 eggs, 2 strips of bacon, 1 tsp salt/pepper
  */
 
+let recipe = {};
+
+recipe.title = 'Omelette';
+recipe.servings = 2;
+recipe.ingredients = ['4 eggs', '2 strips of bacon', '1 tsp salt/pepper'];
+
+for(let key in recipe) {
+    console.log(`${key}: ${recipe[key]}`);
+}

Week1/practice-exercises/4-reading-list.js

@@ -9,3 +9,19 @@
  *  If you haven't read it log a string like You still need to read "The Lord of the Rings"
  */
 
+let books = [
+    { title: 'the Hobbit', author: 'J.R.R. Tolkien', alreadyRead: true },
+    { title: 'the Lord of the Rings', author: 'J.R.R. Tolkien', alreadyRead: false },
+    { title: 'Harry Potter and the Sorcerer\'s Stone', author: 'J.K. Rowling', alreadyRead: true }
+];
+
+for(let book of books) {
+
+    console.log(`${book.title} by ${book.author}`);
+
+    if(book.alreadyRead) {
+        console.log(`You already read "${book.title}".`);
+    } else {
+        console.log(`You still need to read "${book.title}".`);
+    }
+}

Week1/practice-exercises/5-who-wants-a-drink.js

@@ -8,4 +8,13 @@
  */
 
 // There are 3 different types of drinks:
-const drinkTypes = ['cola', 'lemonade', 'water'];
+const drinkTypes = ['cola', 'lemonade', 'water'];
+
+let drinkTray = [];
+
+for (let i = 0; i < 5; i++) {
+
+    drinkTray.push(drinkTypes[i % drinkTypes.length]);
+}
+
+console.log(`Hey guys, I brought a ${drinkTray.join(', ')}!`);

Week1/prep-exercises/1-traffic-light/traffic-light-1.js

@@ -11,21 +11,12 @@ let rotations = 0;
 while (rotations < 2) {
   const currentState = trafficLight.state;
   console.log("The traffic light is on", currentState);
-
-  // TODO
-  // if the color is green, turn it orange
-  // if the color is orange, turn it red
-  // if the color is red, add 1 to rotations and turn it green
 }
 
-/**
- * The output should be:
+if (currentState === "green") { trafficLight.state = "orange"; 
 
-The traffic light is on green
-The traffic light is on orange
-The traffic light is on red
-The traffic light is on green
-The traffic light is on orange
-The traffic light is on red
+} else if (currentState === "orange") { trafficLight.state = "red";
 
-*/
+ } else if (currentState === "red") { trafficLight.state = "green";
+   rotations++; 
+  }

Week1/prep-exercises/1-traffic-light/traffic-light-2.js

@@ -1,9 +1,5 @@
 "use strict";
-/**
- * The `possibleStates` property define the states (in this case: colours)
- * in which the traffic light can be.
- * The `stateIndex` property indicates which of the possible states is current.
- */
+
 const trafficLight = {
   possibleStates: ["green", "orange", "red"],
   stateIndex: 0,
@@ -14,20 +10,14 @@ while (cycle < 2) {
   const currentState = trafficLight.possibleStates[trafficLight.stateIndex];
   console.log("The traffic light is on", currentState);
 
-  // TODO
-  // if the color is green, turn it orange
-  // if the color is orange, turn it red
-  // if the color is red, add 1 to cycles and turn it green
-}
-
-/**
- * The output should be:
-
-The traffic light is on green
-The traffic light is on orange
-The traffic light is on red
-The traffic light is on green
-The traffic light is on orange
-The traffic light is on red
+  if (currentState === "green")
+     {  trafficLight.stateIndex = 1; 
+      } else if (currentState === "orange") 
+        {  trafficLight.stateIndex = 2 ;
 
-*/
+        } else if (currentState === "red") { 
+         trafficLight.stateIndex = 0; 
+
+         cycle++;
+         } 
+        }

Week2/prep-exercises/1-traffic-light/traffic-light.js

@@ -6,13 +6,18 @@
  */
 
 function getCurrentState(trafficLight) {
-  // TODO
+
+ return trafficLight.possibleStates[trafficLight.stateIndex];
   // Should return the current state (i.e. colour) of the `trafficLight`
   // object passed as a parameter.
 }
 
 function getNextStateIndex(trafficLight) {
-  // TODO
+
+  if (trafficLight.stateIndex === trafficLight.possibleStates.length - 1) {
+    return 0; 
+  }
+  return trafficLight.stateIndex + 1;
   // Return the index of the next state of the `trafficLight` such that:
   // - if the color is green, it will turn to orange
   // - if the color is orange, it will turn to red

Week2/prep-exercises/2-experiments/index.js

@@ -3,7 +3,10 @@
 function runExperiment(sampleSize) {
   const valueCounts = [0, 0, 0, 0, 0, 0];
 
-  // TODO
+    for (let i = 0; i < sampleSize; i++) {
+      const randomValue = Math.floor(Math.random() * 6) + 1;
+      valueCounts[randomValue - 1]++;
+    }
   // Write a for loop that iterates `sampleSize` times (sampleSize is a number).
   // In each loop iteration:
   //
@@ -15,7 +18,11 @@ function runExperiment(sampleSize) {
 
   const results = [];
 
-  // TODO
+    for (let i = 0; i < valueCounts.length; i++) {
+      const percentage =((valueCounts[i] / sampleSize) * 100).toFixed(2);
+      results.push(`${percentage}`);
+    }
+
   // Write a for..of loop for the `valueCounts` array created in the previous
   // loop. In each loop iteration:
   // 1. For each possible value of the die (1-6), compute the percentage of how
@@ -31,7 +38,11 @@ function runExperiment(sampleSize) {
 function main() {
   const sampleSizes = [100, 1000, 1000000];
 
-  // TODO
+ for (const sampleSize of sampleSizes) {
+  const results = runExperiment(sampleSize);
+  console.log(`${results.join(', ')}`, sampleSize);
+ }
+
   // 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