Codespace bookish spoon 7j569rvxrvg2v7

.vscode/settings.json

@@ -3,5 +3,6 @@
   "[javascript]": {
     "editor.defaultFormatter": "esbenp.prettier-vscode"
   },
-  "editor.formatOnSave": true
+  "editor.formatOnSave": true,
+  "terminal.integrated.sendKeybindingsToShell": true
 }

src/00-hello-world.ts

@@ -12,7 +12,7 @@ export {};
  */
 
 const helloWorld = function() {
-  return "";
+  return "Hello World";
 };
 
-console.log(); // Expected output: "Hello World"
+console.log(helloWorld()); // Expected output: "Hello World"

src/01-syntax-error.ts

@@ -1,8 +1,13 @@
 export {};
 
-function addNumbers(a b c) {
+function addNumbers(a: number, b: number, c: number) {
     return a + b + c;
 }
 
 const result = addNumbers(1, 3, 4);
+const result1 = addNumbers(2, 3, 5);
+const result2 = addNumbers(1, 3, 888);
+
 console.log(result); // Expected output: 8
+console.log(result1);
+console.log(result2);

src/02-syntax-error.ts

@@ -1,7 +1,7 @@
 export {};
 
-function addNumbers(a, b, c)
-    a + b + c;
-
+function addNumbers(a:number, b: number, c: number){
+   return a + b + c;
+}
 const result = addNumbers(1, 3, 4);
 console.log(result); // Expected output: 8

src/03-syntax-error.ts

@@ -1,6 +1,6 @@
 export {};
 
-function(a, b, c) {
+function addNumbers (a:number, b: number, c: number) {
     return a + b + c;
 }
 

src/04-logic-error.ts

@@ -1,7 +1,7 @@
 export {};
 
-function trimWord(word) {
-  return wordtrim();
+function trimWord(word: string):string {
+  return word.trim();
 }
 
 const result = trimWord("  CODELEX ");

src/05-boolean.ts

@@ -1,11 +1,15 @@
 export {};
 
-const isHappy = "true";
+const isHappy = true;
 
-if (isHappy == false) {
+if (isHappy) {
   console.log("I am happy");
 } else {
   console.log("I am not happy");
 }
 
-// Expected output: "I am happy"
+// Expected output: "I am happy 
+
+//2. isHappy ? console.log("I am happy") : console.log("I am not happy");
+
+//3. console.log(`I am ${isHappy ? '' : 'not' }happy`)

src/06-logic-error.ts

@@ -1,7 +1,7 @@
 export {};
 
-function trimWord(word) {
-  return word.trim;
+function trimWord(word: string): string{
+  return word.trim();
 }
 
 const result = trimWord("  CODELEX ");

src/07-logic-error.ts

@@ -1,7 +1,7 @@
 export {};
 
-function trim(word) {
-  return "word".trim();
+function trim(word: string): string {
+  return word.trim();
 }
 
 const result = trim("CODELEX  ");

src/08-function-output.ts

@@ -1,8 +1,8 @@
 export {};
 
-function getNumber() {
-  return Math.random() * 10;
+function getRandomNumber() {
+  return Math.round(Math.random() * 10);
 }
 
-const result = null; // call the function created above and put the result inside the variable
+const result = getRandomNumber(); // call the function created above and put the result inside the variable
 console.log(result); // Expected output: {random number}

src/09-logic-error.ts

@@ -1,8 +1,8 @@
 export {};
 
-function multiply(a, b, c) {
-  a * b * c;
-  return;
+function multiply(a: number, b: number, c: number): number {
+  return a * b * c;
+
 }
 
 const result = multiply(1, 3, 4);

src/10-function-output.ts

@@ -1,8 +1,9 @@
 export {};
 
-function s(w1, w2) {
-  return w1.concat(' ').concat(w2);
+function joinString(w1: string, w2: string): string {
+  //return w1.concat(' '). concat(w2);
+  return w1.concat(" ", w2);
 }
 
-const result = undefined; // concatenate two strings - 'hello', 'world', using the function above
+const result = joinString ('hello','world'); // concatenate two strings - 'hello', 'world', using the function above
 console.log(result); // Expected output: "hello world"

src/11-function-output.ts

@@ -1,6 +1,12 @@
 export {};
 
-function concatenate(firstWord, secondWord, thirdWord) {
+function concatenate(
+  firstWord: string, 
+  secondWord: string, 
+  thirdWord: string):
+  string {
+
+  return `${firstWord} ${secondWord} ${thirdWord}`;
   // Write the body of this function to concatenate three words together with space between them
 }
 

src/12-truncate-string.ts

@@ -1,3 +1,31 @@
 export {};
 
-console.log(truncateString("CODELEX", 4)); // Expected output: CODE
+function truncateString(str: string, length: number):string{
+    //return str.substring(0,length)
+
+
+   // Expected output: CODE
+
+
+   let result = "";
+
+  for(let i = 0; i < length; i++){
+      console.log('i, str[i]:', i, str[i]);
+
+      result = result + str[i];
+      console.log('result: ', result);
+      console.log('=======================');
+    }
+    return result;
+
+  }
+      console.log (truncateString ("CODELEX", 4));
+
+
+
+
+
+
+
+
+

src/13-is-blank.ts

@@ -1,8 +1,18 @@
 export {};
 
-/**
- * Create a function called isBlank, which checks if passed string is blank or not
- */
+
+ // Create a function called isBlank, which checks if passed string is blank or not
+
+
+  function isBlank(value: string | null): boolean {
+   if(value === null) {
+        return true;
+    }
+    if (value.trim() === ""){
+        return true;
+    }
+    return false;
+}
 
 console.log(isBlank(null)); // Expected output: true
 console.log(isBlank("")); // Expected output: true

src/14-repeat-string.ts

@@ -1,6 +1,13 @@
 export {};
 
-const repeatString = () => {};
+const repeatString = (str: string, timesToRepeat: number): string => {
+ // return str.repeat(timesToRepeat);
+    let result = str;
+    for(let i = 1; i < timesToRepeat; i++){
+        result += str;   //result = result + str;
+    }
+    return result; 
+};
 
 console.log(repeatString("a", 4)); // Expected output: 'aaaa'
-console.log(repeatString("b", 5)); // Expected output: 'bbbbb'
+console.log(repeatString("bob", 5)); // Expected output: 'bbbbb'

src/15-greatest-number.ts

@@ -1,6 +1,8 @@
 export {};
 
-function greatest(x, y) {}
+function greatest(x: number, y: number) {
+
+}
 
 console.log(greatest(1, 2)); // Expected output: 2
 console.log(greatest(5, 2)); // Expected output: 5

src/16-tax.ts

@@ -13,7 +13,9 @@ export {};
  */
 
 // You are allowed to change only this function
-function calculateSalesTax() {}
+function calculateSalesTax(price: number): string {
+    return (price * 0.21).toFixed(2);
+}
 
 const product = "You don't know JS";
 const price = 19.99;

src/17-format-currency.ts

@@ -9,8 +9,11 @@ export {};
  */
 
 // You are allowed to change only this function
-function formatCurrency() {}
 
+function formatCurrency(num: number): string{
+  return num.toFixed(2)
+}
+
 function calculateSalesTax(price: number) {
   return price * 0.21;
 }

src/18-currency-conversion.ts

@@ -8,11 +8,20 @@ export {};
  */
 
 // You are allowed to change only this function
-function convertToUSD() {}
+/*
+const CONVERSION_RATE_EUR_USD = 1.09;
+
+function convertToUSD() {
+
+    }
+    function addFee(price: number): number{
+        return price + price * CONVERSION_FEE;
+    }
+
 
 const product = "You don't know JS";
 const price = 19.99;
-const priceInUSD = convertToUSD(price);
+const priceInUSD = convertToUSD(price );
 
 console.log("Product: " + product);
 console.log("Price: $" + priceInUSD);

src/19-currency-conversion.ts

@@ -15,14 +15,29 @@ export {};
  */
 
 // You are allowed to change this function
-function convertToUSD(price) {}
+
+const CONVERSION_FEE = 0.02;
+const CONVERSION_RATE_EUR_USD = 1.09;
+const CONVERSION_RATE_EUR_BRL = 5.6;
+const CONVERSION_RATE_EUR_YEN = 155.6;
+
+function formatCurrency(num: number): string{
+    return num.toFixed(2);
+}
+function addFee(price: number): number{
+    return price + price * CONVERSION_FEE;
+}
+function convertCurrency(price: number,rate: number): number {
+    return price * rate;
+}
 // You are allowed to change this function
-function convertToBRL(price) {}
+
 
 const product = "You don't know JS";
 const price = 12.5;
-const priceInUSD = convertToUSD(price);
-const priceInBRL = convertToBRL(price);
+const convertedToUSD = convertCurrency(price, CONVERSION_RATE_EUR_USD);
+const priceInUSD = formatCurrency(addFee(convertedToUSD));
+const priceInBRL = formatCurrency(addFee(convertCurrency(price, CONVERSION_RATE_EUR_BRL)));
 
 console.log("Product: " + product);
 console.log("Price: $" + priceInUSD);

src/20-arrays.ts

@@ -8,4 +8,9 @@ export {};
  *  - https://javascript.info/array
  */
 
-console.log(stringToArray(["John Doe"])); // Expected output: ['John', 'Doe']
+function stringToArray(fullName: string): string[] {
+  return fullName.split(" ");
+}
+
+const nameArray = stringToArray("John Doe");
+console.log(nameArray); // Expected output: ['John', 'Doe']

src/21-map.ts

@@ -1,16 +1,15 @@
 export {};
 
-function tidyUpString(str) {
-  return str
-    .trim()
-    .toLowerCase()
-    .replace("/", "");
+function tidyUpString(str: string): string {
+  return str.trim().toLowerCase().replace("/", "");
 }
 
 // You are allowed to edit this function
-function capitalise(str) {}
+function capitalise(str: string): string {
+  return str.charAt(0).toUpperCase() + str.slice(1);
+}
 
 const mentors = ["/Daniel ", "irina ", " Gordon", "ashleigh "];
-let mentorsTidy; // You are allowed to edit this line
+let mentorsTidy = mentors.map((mentor) => capitalise(tidyUpString(mentor))); // You are allowed to edit this line
 
 console.log(mentorsTidy); // Expected output: ["Daniel", "Irina", "Gordon", "Ashleigh"]

src/22-sort.ts

@@ -1,6 +1,7 @@
 export {};
 
 const letters = ["a", "n", "c", "e", "z", "f"];
-let sortedLetters; // You are allowed to change only this line
+let sortedLetters = [...letters].sort(); // You are allowed to change only this line
 
 console.log(sortedLetters); // Expected output: [ 'a', 'c', 'e', 'f', 'n', 'z' ]
+

src/23-min-max.ts

@@ -5,9 +5,29 @@ export {};
  * one of which does not use built-in Math methods.
  */
 
-const min = array => {};
+const min = (array: any) => {
+  let min = array[0];
+  for (let i = 1; i < array.length; i++) {
+    if (array[i] < min) {
+      min = array[i];
+    }
+  }
+  return min;
+};
 
-const max = array => {};
+const max = (array: any) => {
+  let max = array[0];
+  for (let i = 1; i > max; i++) {
+    if (array[i] > max) {
+      max = array[i];
+    }
+  }
+  return max;
+};
+{
+    const min = (array: any) => Math.min(...array);
+    const max = (array: any) => Math.max(...array);
+}
 
 console.log(min([1, 2, 3, 4, 5])); // Expected output: 1
 console.log(min([9, -3, 6])); // Expected output: -3

src/24-looping-with-conditions.ts

@@ -1,5 +1,7 @@
 export {};
 
-function onlyTheAces(arr) {}
+function onlyTheAces(arr: string[]): string[] {
+    return arr.filter(element => element === "Ace");
+}
 
 console.log(onlyTheAces(["Ace", "King", "Queen", "Jack", "Ace"])); // Expected result: ['Ace', 'Ace']