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Original file line number Diff line number Diff line change
Expand Up @@ -10,9 +10,18 @@
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 {
return "Reflex angle";
}
// Run the tests, work out what Case 2 is testing, and implement the required code here.
// Then keep going for the other cases, one at a time.

// Run the tests, work out what Case 2 is testing, and implement the required code here.
// Then keep going for the other cases, one at a time.
}

// The line below allows us to load the getAngleType function into tests in other files.
Expand Down Expand Up @@ -51,13 +60,17 @@ assertEquals(acute, "Acute angle");
// Then the function should return "Obtuse angle"
const obtuse = getAngleType(120);
// ====> write your test here, and then add a line to pass the test in the function above
assertEquals(obtuse, "Obtuse angle");

// Case 4: Identify Straight Angles:
// When the angle is exactly 180 degrees,
// Then the function should return "Straight angle"
// ====> write your test here, and then add a line to pass the test in the function above

const straight = getAngleType(180);
assertEquals(straight, "Straight angle");
// Case 5: Identify Reflex Angles:
// When the angle is greater than 180 degrees and less than 360 degrees,
// Then the function should return "Reflex angle"
// ====> write your test here, and then add a line to pass the test in the function above
// ====> write your test here, and then add a line to pass the test in the function above
const reflex = getAngleType(240);
assertEquals(reflex, "Reflex angle");
Original file line number Diff line number Diff line change
Expand Up @@ -5,11 +5,17 @@
// Written here like this: 1/2 == Numerator/Denominator
// the first test and first case is written for you
// complete the rest of the tests and cases
// write one test at a time, and make it pass, build your solution up methodically
// write one test at a time, and make it pass, build your solution up

function isProperFraction(numerator, denominator) {
if (denominator === 0) return false;
if (numerator < 1) numerator = numerator * -1;
if (denominator < 1) denominator = Math.abs(denominator);
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Why use different approaches to remove the negative sign from a number?

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I don't know if you want me to use an existing library or solve it manually.

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In real interview, developers are expected to explain their code and give a rational explanation why they do things in certain way.

Your code looks odd to me, that's why I raised the question.

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Thanks for your feedback. From now on, I’ll try to write my code as if I’m working.


if (numerator < denominator) {
return true;
} else {
return false;
}
}

Expand Down Expand Up @@ -47,13 +53,20 @@ assertEquals(improperFraction, false);
// Explanation: The fraction -4/7 is a proper fraction because the absolute value of the numerator (4) is less than the denominator (7). The function should return true.
const negativeFraction = isProperFraction(-4, 7);
// ====> complete with your assertion
assertEquals(negativeFraction, true);

// Equal Numerator and Denominator check:
// Input: numerator = 3, denominator = 3
// target output: false
// Explanation: The fraction 3/3 is not a proper fraction because the numerator is equal to the denominator. The function should return false.
const equalFraction = isProperFraction(3, 3);
// ====> complete with your assertion

assertEquals(equalFraction, false);
// Stretch:
// What other scenarios could you test for?
//Negative fraction check
//Input: numerator=-4, denominator=2;
//target output: false
// Explanation: The fraction -4/2 is not a proper fraction because the absolute value of the numerator (4) is more than the denominator (2). The function should return false.
const negativeFractionCase2 = isProperFraction(-4, 2);
assertEquals(negativeFractionCase2, false);
Original file line number Diff line number Diff line change
Expand Up @@ -8,11 +8,20 @@
// write one test at a time, and make it pass, build your solution up methodically
// just make one change at a time -- don't rush -- programmers are deep and careful thinkers
function getCardValue(card) {
const rank = card.slice(0, -1);
if (rank === "A") {
return 11;
}
if (rank === "J" || rank === "Q" || rank === "K") {
return 10;
}
const convertTheStringtoNumber = Number(rank);
if (convertTheStringtoNumber >= 2 && convertTheStringtoNumber <= 10) {
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In JavaScript, strings that represent valid numeric literals in the language can be safely
converted to equivalent numbers or parsed into a valid integers.
Do you want to recognize these string values as valid ranks?

To find out what these strings are, you can ask AI

What kinds of string values would make Number(rank) evaluate to 2 in JS?

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Thanks, I’ve learned a new validation technique from your feedback.

return convertTheStringtoNumber;
} else {
return "Invalid card rank";
}
}

// The line below allows us to load the getCardValue function into tests in other files.
// This will be useful in the "rewrite tests with jest" step.
module.exports = getCardValue;
Expand Down Expand Up @@ -40,18 +49,26 @@ assertEquals(aceofSpades, 11);
// Then it should return the numeric value corresponding to the rank (e.g., "5" should return 5).
const fiveofHearts = getCardValue("5♥");
// ====> write your test here, and then add a line to pass the test in the function above

assertEquals(fiveofHearts, 5);
// Handle Face Cards (J, Q, K):
// Given a card with a rank of "10," "J," "Q," or "K",
// When the function is called with such a card,
// Then it should return the value 10, as these cards are worth 10 points each in blackjack.

const jackofHearts = getCardValue("J♥");
assertEquals(jackofHearts, 10);
const queenofSpades = getCardValue("Q♠");
assertEquals(queenofSpades, 10);
const kingofSpades = getCardValue("K♠");
assertEquals(kingofSpades, 10);
// Handle Ace (A):
// Given a card with a rank of "A",
// When the function is called with an Ace,
// Then it should, by default, assume the Ace is worth 11 points, which is a common rule in blackjack.

const aceofHearts = getCardValue("A♥");
assertEquals(aceofHearts, 11);
// Handle Invalid Cards:
// 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."
const invalidCards = getCardValue("B♥");
assertEquals(invalidCards, "Invalid card rank");
Original file line number Diff line number Diff line change
Expand Up @@ -12,15 +12,25 @@ test("should identify right angle (90°)", () => {
// Case 2: Identify Acute Angles:
// When the angle is less than 90 degrees,
// Then the function should return "Acute angle"
test("should identify Acute Angles", () => {
expect(getAngleType(70)).toEqual("Acute angle");
});

// Case 3: Identify Obtuse Angles:
// When the angle is greater than 90 degrees and less than 180 degrees,
// Then the function should return "Obtuse angle"

test("should identify Obtuse Angles", () => {
expect(getAngleType(120)).toEqual("Obtuse angle");
});
// Case 4: Identify Straight Angles:
// When the angle is exactly 180 degrees,
// Then the function should return "Straight angle"

test("should identify Straight Angles", () => {
expect(getAngleType(180)).toEqual("Straight angle");
});
// Case 5: Identify Reflex Angles:
// When the angle is greater than 180 degrees and less than 360 degrees,
// Then the function should return "Reflex angle"
test("should identify Reflex Angles", () => {
expect(getAngleType(240)).toEqual("Reflex angle");
});
Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,14 @@ test("should return true for a proper fraction", () => {
});

// Case 2: Identify Improper Fractions:

test("returns false for an improper fraction", () => {
expect(isProperFraction(5, 2)).toEqual(false);
});
// Case 3: Identify Negative Fractions:

test("returns true for a negative proper fraction( absolute value of the numerator is less than the denominator)", () => {
expect(isProperFraction(-4, 7)).toEqual(true);
});
Comment on lines +14 to +16
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When preparing tests, we should ensure the tests cover all possible cases (and maybe test multiple samples within each case to make the test more robust). Can you think of case(s) that should also be tested?

// Case 4: Identify Equal Numerator and Denominator:
test("returns false when numerator equals denominator", () => {
expect(isProperFraction(9, 9)).toEqual(false);
});
Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,27 @@ test("should return 11 for Ace of Spades", () => {
});

// Case 2: Handle Number Cards (2-10):
test("should return the numeric value for number cards (2-10)", () => {
const fiveofHearts = getCardValue("5♥");
expect(fiveofHearts).toEqual(5);
const tenofHearts = getCardValue("10♥");
expect(tenofHearts).toEqual(10);
});
// Case 3: Handle Face Cards (J, Q, K):
test("should return 10 for face cards (J, Q, K)", () => {
const kingofHearts = getCardValue("K♥");
expect(kingofHearts).toEqual(10);
const queenofHearts = getCardValue("Q♥");
expect(queenofHearts).toEqual(10);
});
// Case 4: Handle Ace (A):
test("should return 11 for an Ace", () => {
const aceofHearts = getCardValue("A♥");
expect(aceofHearts).toEqual(11);
});

// Case 5: Handle Invalid Cards:
test("should return invalid card rank", () => {
const twelveofHearts = getCardValue("12♥");
expect(twelveofHearts).toEqual("Invalid card rank");
});