sprint 3 exercises

Sprint-2/debug/0.js

@@ -1,7 +1,8 @@
 // Predict and explain first...
 
 function multiply(a, b) {
-  console.log(a * b);
+  let multiplyOutput = Math.abs(a*b);
+  return multiplyOutput;
 }
 
-console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
+console.log(`The result of multiplying 10 and 32 is ${multiply(10, -5)}`);

Sprint-2/debug/1.js

@@ -1,8 +1,7 @@
 // Predict and explain first...
 
 function sum(a, b) {
-  return;
-  a + b;
+  return a+b;
 }
 
 console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);

Sprint-2/debug/2.js

@@ -1,9 +1,10 @@
 // Predict and explain first...
 
-const num = 103;
+// const num = 103; this variable is a universal one. function needs its local variable.
 
-function getLastDigit() {
-  return num.toString().slice(-1);
+function getLastDigit(num) {
+  let lastDigit = num.toString().slice(-1);
+  return lastDigit;
 }
 
 console.log(`The last digit of 42 is ${getLastDigit(42)}`);

Sprint-2/errors/0.js

@@ -3,7 +3,10 @@
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
 
-function capitalise(str) {
-  let str = `${str[0].toUpperCase()}${str.slice(1)}`;
-  return str;
+function capitalise(x) {
+  let z = `${x[0].toUpperCase()}${x.slice(1)}`; //inja age + bezaram toye output mishe + lol
+  return z;
 }
+ /*khob error chi bood? i gave variable x to be my parameter. so now inside the function, if  i want to create a new
+ variable, it needs a new name! */
+console.log(capitalise("moein"));

Sprint-2/errors/1.js

@@ -3,11 +3,21 @@
 // Why will an error occur when this program runs?
 // Try playing computer with the example to work out what is going on
 
-function convertToPercentage(decimalNumber) {
-  const decimalNumber = 0.5;
+/* function convertToPercentage(decimalNumber) {
+   decimalNumber = 0.5; //remove this!
   const percentage = `${decimalNumber * 100}%`;
 
   return percentage;
 }
 
-console.log(decimalNumber);
+console.log(decimalNumber); //it must become console.log(convertToPercentage(0.25)); */
+//correct version is written down:
+
+function convertToPercentage(decimalNumber) {
+
+ const percentage = `${decimalNumber * 100}%`;
+
+ return percentage;
+}
+
+console.log(convertToPercentage(0.8));

Sprint-2/errors/2.js

@@ -3,8 +3,12 @@
 
 // this function should square any number but instead we're going to get an error
 
-function square(3) {
+/*function square(3) { //put a variable here for parameter! in this case, name in 'num'
+    return num * num;
+} */
+//correct version is written below:
+function square(num) { 
     return num * num;
 }
-
+console.log(square(87));
 

Sprint-2/extend/format-time.js

@@ -1,13 +1,39 @@
 // This is the latest solution to the problem from the prep.
 // Your task is to write tests for as many different groups of input data or edge cases as you can, and fix any bugs you find.
 
+/* this function does not cover edge cases and minutes.
 function formatAs12HourClock(time) {
   const hours = Number(time.slice(0, 2));
   if (hours > 12) {
     return `${hours - 12}:00 pm`;
   }
   return `${time} am`;
 }
+  */
+//this function below is an updated, advanced version of the function above.
+function formatAs12HourClock(time) {
+  let converted = Number(time.slice(0,2));
+  let minutes = time.slice(-3);
+  //consider special cases first.
+  if (converted === 0 ) {
+    return "00:00 midnight";
+  }
+  else if (converted === 24) {
+    let specialCase24 = 24-12;
+    return `${specialCase24}${minutes} am`
+
+  }
+  else if (converted === 12) {
+    return `${converted}${minutes} pm`;
+  }
+  else if (converted>12){
+    let above12 = converted-12;
+    return `${above12}${minutes} pm`;
+  }
+  else{
+    let below12 = converted.toString().padStart(2,"0");
+    return `${below12}${minutes} am`;}
+}
 
 const currentOutput = formatAs12HourClock("08:00");
 const targetOutput = "08:00 am";

Sprint-2/implement/bmi.js

@@ -1,6 +1,6 @@
 // Below are the steps for how BMI is calculated
 
-// The BMI calculation divides an adult's weight in kilograms (kg) by their height in metres (m) squared.
+// The BMI calculation divides an adult's weight in kilograms (kg) by their height in metres (m)  .
 
 // For example, if you weigh 70kg (around 11 stone) and are 1.73m (around 5 feet 8 inches) tall, you work out your BMI by:
 
@@ -13,3 +13,27 @@
 // Given someone's weight in kg and height in metres
 // Then when we call this function with the weight and height
 // It should return their Body Mass Index to 1 decimal place
+function BMI(weight,height){
+    let heightSquared = height*height;
+    let BMICalc = (weight/heightSquared).toFixed(1);
+    return `Your BMI is:${BMICalc}`;
+}
+console.log(BMI(65,1.72));
+//what if i wanted to ask questions first? prompt is not working here. i need something more complex named readline ... 
+function printManyTimes(str) {
+    "use strict";
+
+    const SENTENCE = str + " is cool!";
+    let output = ""; // Store the full output here
+
+    for (let i = 0; i < str.length; i += 2) {
+      output += SENTENCE + "<br>"; // Adds each sentence with a line break
+    }
+
+    // Find the element with id 'output' and set its HTML content
+    document.getElementById("output").innerHTML = output;
+  }
+
+  // Call the function
+  printManyTimes("freeCodeCamp");
+

Sprint-2/implement/cases.js

@@ -13,3 +13,30 @@
 
 // You will need to come up with an appropriate name for the function
 // Use the string documentation to help you find a solution
+/*function convertToUpperSnakeCase(str){
+    let x = str[0].toUpperCase()+str.slice(1);
+    return x;
+}
+console.log(convertToUpperSnakeCase("sue and moein the best older brother")); */
+/* function convertToUpperSnakeCase(str){
+    let x = str.split(" ");
+    let upperX = x[0].charAt(0).toUpperCase();
+    return upperX;       // output: S
+}
+console.log(convertToUpperSnakeCase("sue and moein the best older brother")); */
+function convertToUpperSnakeCase(str){
+    let x = str.replaceAll(" ","_");
+   let upperX = x.toUpperCase();
+    return upperX;
+}
+console.log(convertToUpperSnakeCase("sue and moein the best older brother"));
+//a function to turn "sue and moein the best older brother" to "Sue And Moein The Best Brother In The World":
+function capitaliseFirstLetter(sentence){
+    let x = sentence.split(" "); // Split the sentence into an array of words
+    let y= x.map(word => {
+        return word[0].toUpperCase() + word.slice(1).toLowerCase();
+    })
+    let z = y.join(" ")  // Join the words back into a single string
+    return z;
+}
+console.log(capitaliseFirstLetter("sue and moein the best older brother"));

Sprint-2/implement/pounds.js

@@ -0,0 +1,33 @@
+// In Sprint-1, there is a program written in interpret/to-pounds.js
+
+// You will need to take this code and turn it into a reusable block of code.
+// You will need to declare a function called toPounds with an appropriately named parameter.
+
+// You should call this function a number of times to check it works for different inputs. 
+/* function toPounds(penceString) {  //example: 123p
+    let removeP = penceString.slice(0,penceString.length-1); // output: 123
+    let getPoundPart = removeP.slice(0,removeP.length-2); //output: 1
+    let getPencePart = removeP.slice(-2); //23
+    return `${getPoundPart}.${getPencePart} pound`;
+}
+console.log(toPounds("123p"));
+// bug for 23p!. needs padding
+function toPounds2(penceString) {  //example: 23p
+    let removeP = penceString.slice(0,penceString.length-1); // output: 23
+    let getPoundPart = removeP.slice(0,removeP.length-2).padStart(1,"0"); //it was output: empty before padding. after: 0
+    let getPencePart = removeP.slice(-2); //23
+    return `${getPoundPart}.${getPencePart} pound`;
+
+}
+console.log(toPounds("23p")); */
+
+//most updated version with fixed bugs: 
+function toPounds3(penceString) {  //example: 1p
+    let removeP = penceString.slice(0,penceString.length-1); // output: 1
+    let getPoundPart = removeP.slice(0,removeP.length-2).padStart(1,"0"); //output: 0
+    let getPencePart = removeP.slice(-2).padStart(2,"0"); //it was output:1 before padding. after: 01
+    return `${getPoundPart}.${getPencePart} pound`;
+
+
+}
+console.log(toPounds3("1p"));

Sprint-2/implement/vat.js

@@ -8,3 +8,10 @@
 // Given a number,
 // When I call this function with a number
 // it returns the new price with VAT added on
+function priceWithVat(price){
+    let vatPrice = price*1.2;
+    return `£${vatPrice}`;
+}
+const targetGoal = "£60";
+const currentGoal = priceWithVat(50);
+console.assert(targetGoal===currentGoal, "try again!");

Sprint-2/interpret/time-format.js

@@ -18,14 +18,15 @@ function formatTimeDisplay(seconds) {
 
 // Questions
 
-// a) When formatTimeDisplay is called how many times will pad be called?
+// a) When formatTimeDisplay is called how many times will pad be called? 3
 
 // Call formatTimeDisplay with an input of 61, now answer the following:
 
-// b) What is the value assigned to num when pad is called for the first time?
+// b) What is the value assigned to num when pad is called for the first time? 0
 
-// c) What is the return value of pad is called for the first time?
+// c) What is the return value of pad is called for the first time? 00
 
-// d) What is the value assigned to num when pad is called for the last time in this program?  Explain your answer
+// d) What is the value assigned to num when pad is called for the last time in this program?  1, it shows th remaining second
 
-// e) What is the return value assigned to num when pad is called for the last time in this program?  Explain your answer
+// e) What is the return value assigned to num when pad is called for the last time in this program?  01, it is the remaining second 
+//on which padStart is executed and as a result, a 0 is added to its start.

Sprint-3/implement/example.test.js

@@ -0,0 +1,99 @@
+//output testing for get-angle-type function:
+function getAngleType(angle) {
+    let angleConverted = Number(angle.slice(0,-8));
+    if (angleConverted === 90 ){
+        return "Right angle";
+    }
+    else if (angleConverted === 180) {
+        return "Straight angle";
+    }
+    else if (angleConverted < 90 ) {
+        return "Acute angle";
+    }
+    else if (angleConverted > 90 && angleConverted < 180){
+        return "Obtuse angle";
+    }
+    else if (angleConverted > 180 && angleConverted < 360){
+        return "Reflex angle";
+    }
+}
+test ('obtuse angle', () => {
+    expect(getAngleType("120 degrees")).toBe('Obtuse angle');
+});
+//assertion check for get-card-value function:
+function getCardValue(rankSuit) {
+    let rankPart = rankSuit.slice(0,rankSuit.length-1);
+    if (rankPart >= 2 && rankPart <= 9){
+        return rankPart;
+    }
+    else if(["10", "J", "Q", "K"].includes(rankPart)){
+        return 10;
+    }
+    else if(rankPart === "A"){
+        return 11;
+    }
+    else{
+        return "Invalid card rank";
+    }
+}
+test (`expected output is 10`, () => {
+    expect(getCardValue("10♠")).toBe(10);
+});
+// assertion check for is-proper-fraction function:
+function isProperFraction(fraction) {
+    let fractionArray = fraction.split("/");
+    //position special case at the beginning of condition.
+    if (fractionArray[1] == 0){
+        return "Error";
+    }
+    else if (Math.abs(fractionArray[0]) < fractionArray[1]){
+        return true;
+    }
+    else if (Math.abs(fractionArray[0]) >= fractionArray[1] ){
+        return false;
+    }
+}
+test ('expected output is error', () => {
+    expect(isProperFraction("5/0")).toBe('Error');
+});
+// assertion check for is-valid-triangle:
+function isValidTriangle(a,b,c){
+    let sum_V1 = a+b;
+    let sum_V2 = a+c;
+    let sum_v3 = b+c;
+    if (sum_V1 > c && sum_V2 > b && sum_v3 > a) {
+        return true;
+    }
+    else {
+        return false
+    }
+}
+test ('expected output is true', () =>{
+    expect(isValidTriangle(1,7,7)).toBe(true);
+})
+test ('expected output is false', () =>{
+    expect(isValidTriangle(1,2,7)).toBe(false);
+})
+//assertion check for rotate-char:
+function rotateCharacter(letter,shift){
+    if (letter >= 'a' && letter <= 'z'){
+        let lowerCase = ((letter.charCodeAt(0) - 'a'.charCodeAt(0) + shift) % 26) + 'a'.charCodeAt(0); 
+        return String.fromCharCode(lowerCase);
+    }
+    else if (letter >= 'A' && letter <= 'Z'){
+        let upperCase = ((letter.charCodeAt(0) - 'A'.charCodeAt(0) + shift) % 26) + 'A'.charCodeAt(0);
+        return String.fromCharCode(upperCase);
+    }
+    else {
+        return letter;
+    }
+}
+test ('expected output is f', () =>  {
+    expect(rotateCharacter('b',4)).toBe('f');
+})
+test ('expected output is K', () =>  {
+    expect(rotateCharacter('H',3)).toBe('K');
+})
+test ('expected output is E', () =>  {
+    expect(rotateCharacter('Z',5)).toBe('E');
+})

Sprint-3/implement/get-angle-type.js

@@ -25,3 +25,22 @@
 // Identify Reflex Angles:
 // When the angle is greater than 180 degrees and less than 360 degrees,
 // Then the function should return "Reflex angle"
+function getAngleType(angle) {
+    let angleConverted = Number(angle.slice(0,-8));
+    if (angleConverted === 90 ){
+        return "Right angle";
+    }
+    else if (angleConverted === 180) {
+        return "Straight angle";
+    }
+    else if (angleConverted < 90 ) {
+        return "Acute angle";
+    }
+    else if (angleConverted > 90 && angleConverted < 180){
+        return "Obtuse angle";
+    }
+    else if (angleConverted > 180 && angleConverted < 360){
+        return "Reflex angle";
+    }
+}
+console.log(getAngleType("120 degrees"));