Complete Sprint 2 mandatory and stretch tasks

Author: Samual-Hu

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

@@ -16,4 +16,7 @@
 
 function calculateBMI(weight, height) {
     // return the BMI of someone based off their weight and height
-}
+    let bmi = weight / (height * height);
+    return parseFloat(bmi.toFixed(1));
+}
+console.log(`The BMI is: ${calculateBMI(70, 1.73)}`);

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
+function toUpperSnakeCase(text) {
+  return text.toUpperCase().replaceAll(" ", "_");
+}
+console.log(toUpperSnakeCase("hello there"));
+console.log(toUpperSnakeCase("lord of the rings"));

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

@@ -4,3 +4,16 @@
 // 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) {
+  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");
+  
+  return `£${pounds}.${pence}`;
+}
+
+console.log(toPounds("50p"));
+console.log(toPounds("399p"));
+console.log(toPounds("5p"));
+console.log(toPounds("12345p"));

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

@@ -10,25 +10,25 @@ function formatTimeDisplay(seconds) {
 
   return `${pad(totalHours)}:${pad(remainingMinutes)}:${pad(remainingSeconds)}`;
 }
-
+console.log(formatTimeDisplay(61));
 // You will need to play computer with this example - use the Python Visualiser https://pythontutor.com/visualize.html#mode=edit
 // to help you answer these questions
 
 // Questions
 
 // a) When formatTimeDisplay is called how many times will pad be called?
-// =============> write your answer here
+// Answer: 3 times.
 
 // 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
+// Answer: 0.
 
 // c) What is the return value of pad is called for the first time?
-// =============> write your answer here
+// Answer: "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
+// Answer: 1. The last call evaluates `pad(remainingSeconds)`. Since 61 % 60 equals 1, the value of remainingSeconds passed to `num` is 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
+// Answer: "01". The function takes the number 1, converts it to a string, and pads it with a leading "0" to make it 2 characters long.

Sprint-2/5-stretch-extend/format-time.js

@@ -3,23 +3,28 @@
 // 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.
 
 function formatAs12HourClock(time) {
-  const hours = Number(time.slice(0, 2));
-  if (hours > 12) {
-    return `${hours - 12}:00 pm`;
+  let hours = Number(time.slice(0, 2));
+  const minutes = time.slice(3, 5);
+  
+  const period = hours >= 12 ? "pm" : "am";
+  
+  hours = hours % 12;
+  if (hours === 0) {
+    hours = 12;
   }
-  return `${time} am`;
+  
+  const paddedHours = hours.toString().padStart(2, "0");
+  
+  return `${paddedHours}:${minutes} ${period}`;
 }
 
-const currentOutput = formatAs12HourClock("08:00");
-const targetOutput = "08:00 am";
-console.assert(
-  currentOutput === targetOutput,
-  `current output: ${currentOutput}, target output: ${targetOutput}`
-);
+console.assert(formatAs12HourClock("08:00") === "08:00 am", "Morning time failed");
+console.assert(formatAs12HourClock("23:00") === "11:00 pm", "Night time failed");
 
-const currentOutput2 = formatAs12HourClock("23:00");
-const targetOutput2 = "11:00 pm";
-console.assert(
-  currentOutput2 === targetOutput2,
-  `current output: ${currentOutput2}, target output: ${targetOutput2}`
-);
+console.assert(formatAs12HourClock("00:00") === "12:00 am", "Midnight edge case failed");
+console.assert(formatAs12HourClock("00:15") === "12:15 am", "Past midnight failed");
+
+console.assert(formatAs12HourClock("12:00") === "12:00 pm", "Noon edge case failed");
+console.assert(formatAs12HourClock("12:30") === "12:30 pm", "Past noon failed");
+
+console.assert(formatAs12HourClock("13:45") === "01:45 pm", "Padding hour formatting failed");