ITP JAN25 | KATARZYNA_KAZIMIERCZUK | STRUCTURING_AND_TESTING_DATA | SPRINT2

Sprint-2/1-key-errors/0.js

@@ -1,13 +1,22 @@
 // Predict and explain first...
 //  =============> write your prediction here
+//
+// function to capitalize the first letter of a string passed as a parameter
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
+//str has been declared as a param befre being declared
 
+// function capitalise(str) {
+//   let str = `${str[0].toUpperCase()}${str.slice(1)}`;
+//   return str;
+// }
+console.log(capitalise("string"));
+// =============> write your explanation here
+//it happens because tstr is declared twice
+
+// =============> write your new code here
 function capitalise(str) {
-  let str = `${str[0].toUpperCase()}${str.slice(1)}`;
+  str = `${str[0].toUpperCase()}${str.slice(1)}`;
   return str;
 }
-
-// =============> write your explanation here
-// =============> write your new code here

Sprint-2/1-key-errors/1.js

@@ -2,8 +2,11 @@
 
 // Why will an error occur when this program runs?
 // =============> write your prediction here
+// decimal number has been declared in the funcion scope as a param
+// and is not accessible outside of the function scope to console.log it will throw an error
 
 // Try playing computer with the example to work out what is going on
+decimalNumber = 0.5;
 
 function convertToPercentage(decimalNumber) {
   const decimalNumber = 0.5;
@@ -13,8 +16,11 @@ function convertToPercentage(decimalNumber) {
 }
 
 console.log(decimalNumber);
+console.log(convertToPercentage(decimalNumber));
 
 // =============> write your explanation here
+// decim alNumber has to be availabke outside of the function scope to log its value
 
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+console.log(decimalNumber);

Sprint-2/1-key-errors/2.js

@@ -4,17 +4,20 @@
 // this function should square any number but instead we're going to get an error
 
 // =============> write your prediction of the error here
-
-function square(3) {
-    return num * num;
-}
+//a number value is hardcoded in the param instead of passing a reference to a parameter
+// function square(3) {
+//     return num * num;
+// }
 
 // =============> write the error message here
-
+// SyntaxError: Unexpected number
 // =============> explain this error message here
-
+//the function expected a parameter but instead a number was passed
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
+function square(num) {
+    return num * num;
+}
 
-
+console.log(square(2))

Sprint-2/2-mandatory-debug/0.js

@@ -1,14 +1,21 @@
 // Predict and explain first...
 
 // =============> write your prediction here
+//function does not run but is prining the resut into console
 
-function multiply(a, b) {
-  console.log(a * b);
-}
+// function multiply(a, b) {
+//   console.log(a * b);
+// }
 
-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, 32)}`);
 
 // =============> write your explanation here
+// return the result
 
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+const multiply = (a, b) => a*b
+
+multiply(10, 32)
+
+console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);

Sprint-2/2-mandatory-debug/1.js

@@ -1,13 +1,17 @@
 // Predict and explain first...
 //  =============> write your prediction here
+//return is befror ethe operation and the calculation is a dead code
+// function sum(a, b) {
+//   return;
+//   a + b;
+// }
 
-function sum(a, b) {
-  return;
-  a + b;
-}
-
-console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
+// console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
 // =============> write your explanation here
+// return a+b
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+
+const sum = (a,b) => a+b
+console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);

Sprint-2/2-mandatory-debug/2.js

@@ -2,23 +2,37 @@
 
 // Predict the output of the following code:
 // =============> Write your prediction here
+//num is hardcoded and the function will return the same value each time
+// const num = 103;
 
-const num = 103;
+// function getLastDigit() {
+//   return num.toString().slice(-1);
+// }
 
-function getLastDigit() {
-  return num.toString().slice(-1);
-}
-
-console.log(`The last digit of 42 is ${getLastDigit(42)}`);
-console.log(`The last digit of 105 is ${getLastDigit(105)}`);
-console.log(`The last digit of 806 is ${getLastDigit(806)}`);
+// console.log(`The last digit of 42 is ${getLastDigit(42)}`);
+// console.log(`The last digit of 105 is ${getLastDigit(105)}`);
+// console.log(`The last digit of 806 is ${getLastDigit(806)}`);
 
 // Now run the code and compare the output to your prediction
 // =============> write the output here
+// The last digit of 42 is 3
+// The last digit of 105 is 3
+// The last digit of 806 is 3
+
 // Explain why the output is the way it is
 // =============> write your explanation here
+//num is not reassigned each time the function runs
+
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+// const num = 103;
+
+function getLastDigit(num) {
+  return num.toString().slice(-1);
+}
+console.log(`The last digit of 42 is ${getLastDigit(42)}`);
+console.log(`The last digit of 105 is ${getLastDigit(105)}`);
+console.log(`The last digit of 806 is ${getLastDigit(806)}`);
 
 // This program should tell the user the last digit of each number.
 // Explain why getLastDigit is not working properly - correct the problem

Sprint-2/3-mandatory-implement/1-bmi.js

@@ -14,6 +14,11 @@
 // Then when we call this function with the weight and height
 // It should return their Body Mass Index to 1 decimal place
 
-function calculateBMI(weight, height) {
-    // return the BMI of someone based off their weight and height
-}
+function calculateBMI(weight, heightM) {
+  // return parseFloat(weight / (heightCM * heightCM)).toFixed(1); this was returning a string because toFixed(1) returns a string
+  return Number((weight / (heightM * heightM)).toFixed(1)); // here the string is converted to a number
+}
+
+// const calculateBMI = (weight, height) => Number((weight / (heightM * heightM)).toFixed(1));
+
+console.log(calculateBMI(59, 167));

Sprint-2/3-mandatory-implement/2-cases.js

@@ -14,3 +14,8 @@
 // You will need to come up with an appropriate name for the function
 // Use the MDN string documentation to help you find a solution
 // This might help https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/toUpperCase
+
+const convertToUpper = (word) =>
+  word.replace(/ /g, "_").console.log(convertToUpper("kaska"));
+
+console.log(convertToUpper("hello hi hi"));

Sprint-2/3-mandatory-implement/3-to-pounds.js

@@ -4,3 +4,34 @@
 // 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
+
+const toPounds = (costInPence) => {
+    const penceStringWithoutTrailingP = costInPence.substring(0, costInPence.length - 1);
+    const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+    const pounds = paddedPenceNumberString.substring(0, paddedPenceNumberString.length - 2);
+    const pence = paddedPenceNumberString.substring(paddedPenceNumberString.length - 2).padEnd(2, "0");
+
+    return `£${pounds}.${pence}`;
+}; 
+ console.log(toPounds('399p'))   
+
+
+// const penceString = "399p";
+
+// const penceStringWithoutTrailingP = penceString.substring(
+//   0,
+//   penceString.length - 1
+// );
+
+// const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+// const pounds = paddedPenceNumberString.substring(
+//   0,
+//   paddedPenceNumberString.length - 2
+// );
+
+// const pence = paddedPenceNumberString
+//   .substring(paddedPenceNumberString.length - 2)
+//   .padEnd(2, "0");
+
+// console.log(`£${pounds}.${pence}`);
+

Sprint-2/4-mandatory-interpret/time-format.js

@@ -18,17 +18,21 @@ function formatTimeDisplay(seconds) {
 
 // a) When formatTimeDisplay is called how many times will pad be called?
 // =============> write your answer here
-
+//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?
 // =============> write your answer here
+// 0 // 60 was a typos*
 
 // c) What is the return value of pad is called for the first time?
 // =============> write your answer here
+// it is a string "00"
 
 // d) What is the value assigned to num when pad is called for the last time in this program?  Explain your answer
 // =============> write your answer here
+// 1
 
 // e) What is the return value assigned to num when pad is called for the last time in this program?  Explain your answer
 // =============> write your answer here
+// 01