MIGRACODE-JUL 2024 | PRISCILLA MAC-GATUS | MODULE JS1 | WEEK 3

week-3/debug/format-as-12-hours.js

@@ -1,6 +1,9 @@
 function formatAs12HourClock(time) {
   if (Number(time.slice(0, 2)) > 12) {
-    return `${Number(time.slice(0, 2)) - 12}:00 pm`;
+    let hours = Number(time.slice(0, 2)) - 12;
+    let minutes = Number(time.slice(3, 5));
+    minutes = minutes.toString().padStart(2, "0");
+    return `${hours}:${minutes} pm`;
   }
   return `${time} am`;
 }
@@ -26,5 +29,23 @@ console.assert(
 // formatAs12HourClock currently has a 🐛
 
 // a) Write an assertion to check the return value of formatAs12HourClock when it is called with an input "17:42"
+
+const currentOutput3 = formatAs12HourClock("17:42");
+const targetOutput3 = "5:42 pm";
+console.assert(
+  currentOutput3 === targetOutput3,
+  "current output: %s, target output: %s",
+  currentOutput3,
+  targetOutput3
+);
+
 // b) Check the assertion output and explain what the bug is
+
+/*Assertion failed: current output: 5:00 pm, target output: 5:42 pm.This because the 
+equality sign is a strict equality and the value on both sides are not equal.
+current output doesn't display the minutes shown in the target output.
+ Instead of 5:42 pm it displays 5:00pm. 
+
+*/
+
 // c) Now fix the bug and re-run all your assertions

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

@@ -21,3 +21,23 @@
 // 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) {
+  if (angle == 90) {
+    return "Right Angle";
+  } else if (angle < 90) {
+    return "Acute Angle";
+  } else if (angle > 90 && angle < 180) {
+    return "Obtuse Angle";
+  } else if (angle == 180) {
+    return "Straight Angle";
+  } else if (angle > 180 && angle < 360) {
+    return "Reflex Angle";
+  }
+}
+
+console.log(`This is an/a ${getAngleType(90)}.`);
+console.log(`This is an/a ${getAngleType(45)}.`);
+console.log(`This is an/a ${getAngleType(120)}.`);
+console.log(`This is an/a ${getAngleType(180)}.`);
+console.log(`This is an/a ${getAngleType(240)}.`);

week-3/implement/get-card-value.js

@@ -29,3 +29,23 @@
 // Given a card with an invalid rank (neither a number nor a recognized face card),
 // When the function is called with such a card,
 // Then it should throw an error indicating "Invalid card rank."
+
+function getCardValue(cardGiven) {
+  if (cardGiven === "A♠") {
+    return 11;
+  } else if (cardGiven > 2 && cardGiven < 10) {
+    return Number(cardGiven);
+  } else if (cardGiven === "J" || cardGiven === "Q" || cardGiven === "K") {
+    return 10;
+  } else if (cardGiven === "Ace" || cardGiven === "A") {
+    return 11;
+  } else {
+    return "Invalid card rank.";
+  }
+}
+
+console.assert(getCardValue("A♠"));
+console.assert(getCardValue(6));
+console.assert(getCardValue("Q"));
+console.assert(getCardValue("Ace"));
+console.assert(getCardValue("W"));

week-3/implement/is-proper-fraction.js

@@ -33,3 +33,34 @@
 // Explanation: The fraction 3/3 is not a proper fraction because the numerator is equal to the denominator. The function should return false.
 
 // These acceptance criteria cover a range of scenarios to ensure that the isProperFraction function handles both proper and improper fractions correctly and handles potential errors such as a zero denominator.
+
+function isProperFraction(numerator, denominator) {
+  if (numerator < denominator && denominator !== 0) {
+    return "This is true";
+  } else if (numerator > denominator && denominator !== 0) {
+    return "This is false";
+  } else if (denominator === 0) {
+    return "Error!!, Denominator cannot be zero";
+  } else if (denominator > Math.abs(numerator)) {
+    return "This is true";
+  } else if (numerator === denominator) {
+    return "This is false";
+  } else {
+    return "Error!!";
+  }
+}
+
+// Proper Fraction check:
+console.assert(isProperFraction(2, 6));
+
+//Improper Fraction check:
+console.assert(isProperFraction(9, 6));
+
+// Zero Denominator check:
+console.assert(isProperFraction(5, 0));
+
+// Negative Fraction check:
+console.assert(isProperFraction(-9, 9));
+
+// Equal Numerator and Denominator check:
+console.assert(isProperFraction(5, 5));

week-3/implement/is-valid-triangle.js

@@ -38,3 +38,54 @@
 // Then it should return true because the input forms a valid triangle.
 
 // This specification outlines the behavior of the isValidTriangle function for different input scenarios, ensuring it properly checks for invalid side lengths and whether they form a valid triangle according to the Triangle Inequality Theorem.
+
+//--------------------SOLUTION-------------------------------------------
+//where a,b,c denotes the length of each side of a triangle.
+
+//false if  sum of 2 sides is less than 1 side
+//true if sum of 2 sides is greater than  1 side
+//false if any side is <= 0
+
+function isValidTriangle(a, b, c) {
+  if (a + b > c && b + c > a && a + c > b) {
+    return true;
+  } else if (a <= 0 || b <= 0 || c <= 0) {
+    return false;
+  } else if (a + b <= c || b + c <= a || a + c <= b) {
+    return false;
+  } else {
+    return "Error";
+  }
+}
+
+//   sum of 2 sides is less than 1 side
+
+const currentOutput = isValidTriangle(2, 3, 6);
+const targetOutput = false;
+console.assert(currentOutput === targetOutput, currentOutput, targetOutput);
+
+// sum of 2 sides is greater than  1 side
+const currentOutput1 = isValidTriangle(4, 5, 2);
+const targetOutput1 = true;
+console.assert(currentOutput1 === targetOutput1, currentOutput1, targetOutput1);
+
+// if any side is <= 0
+const currentOutput2 = isValidTriangle(0, 3, 3);
+const targetOutput2 = false;
+console.assert(
+  currentOutput2 === targetOutput2,
+
+  currentOutput2,
+  targetOutput2
+);
+
+//if any side is <= 0
+
+const currentOutput3 = isValidTriangle(-1, 4, 7);
+const targetOutput3 = false;
+console.assert(
+  currentOutput3 === targetOutput3,
+
+  currentOutput3,
+  targetOutput3
+);

week-3/refactor/format-as-12-hours.js

@@ -3,4 +3,45 @@
 // That implementation currently uses the expression Number(time.slice(0, 2)) twice
 // Store this expression in a variable and reference it twice in the function in the correct place
 
+function formatAs12HourClock(time) {
+  const slicedHourConvertedToNumber = Number(time.slice(0, 2));
+
+  if (slicedHourConvertedToNumber > 12) {
+    let hours = slicedHourConvertedToNumber - 12;
+    let minutes = Number(time.slice(3, 5));
+    minutes = minutes.toString().padStart(2, "0");
+    return `${hours}:${minutes} pm`;
+  }
+  return `${time} am`;
+}
+
+const currentOutput = formatAs12HourClock("08:00");
+const targetOutput = "08:00 am";
+console.assert(
+  currentOutput === targetOutput,
+  "current output: %s, target output: %s",
+  currentOutput,
+  targetOutput
+);
+
+const currentOutput2 = formatAs12HourClock("23:00");
+const targetOutput2 = "11:00 pm";
+console.assert(
+  currentOutput2 === targetOutput2,
+  "current output: %s, target output: %s",
+  currentOutput2,
+  targetOutput2
+);
+
+const currentOutput3 = formatAs12HourClock("17:42");
+const targetOutput3 = "5:42 pm";
+console.assert(
+  currentOutput3 === targetOutput3,
+  "current output: %s, target output: %s",
+  currentOutput3,
+  targetOutput3
+);
+
 // Explain why it makes more sense to store this expression in a variable
+
+// We tend to write less  code than we should and just like function we can call the variable as many times as we want to within the function.

week-3/refactor/is-vowel.js

@@ -3,15 +3,14 @@ function isVowel(letter) {
     letter === "a" ||
     letter === "e" ||
     letter === "i" ||
-    letter === "i" ||
     letter === "o" ||
     letter === "u"
   );
 }
 
 // here is an implementation of isVowel - this function checks if a letter is a vowel
 
-console.log("case: letter a...");
+console.log(`case: letter a is ${isVowel("a")}`);
 const currentOutput = isVowel("a");
 const targetOutput = true;
 console.assert(
@@ -21,7 +20,7 @@ console.assert(
   targetOutput
 );
 
-console.log("case: letter e...");
+console.log(`case: letter e is ${isVowel("e")}`);
 const currentOutput2 = isVowel("e");
 const targetOutput2 = true;
 console.assert(
@@ -31,7 +30,7 @@ console.assert(
   targetOutput2
 );
 
-console.log("case: letter k...");
+console.log(`case: letter k is ${isVowel("k")}`);
 const currentOutput3 = isVowel("k");
 const targetOutput3 = false;
 console.assert(

week-3/stretch/rotate-char.js

@@ -6,6 +6,23 @@
 // This function is commonly used for weak text encryption and decryption,
 // where shifting characters by a certain value can obscure their meaning or reveal hidden messages.
 
+function rotateCharacter(character, shift) {
+  const alphabetUpper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+  const alphabetLower = "abcdefghijklmnopqrstuvwxyz";
+
+  if (alphabetUpper.includes(character)) {
+    const position = alphabetUpper.indexOf(character);
+    const newPosition = (position + shift) % 26;
+    return alphabetUpper[newPosition];
+  } else if (alphabetLower.includes(character)) {
+    const position = alphabetLower.indexOf(character);
+    const newPosition = (position + shift) % 26;
+    return alphabetLower[newPosition];
+  }
+
+  return character;
+}
+
 // Acceptance criteria:
 
 // Given a character (char) and a shift value (shift),