jamesgarrett · October 11, 2017 03:29
diff --git a/homework-01.js b/homework-01.js
 // Homework 1

 // Hint: You may need SOME of these array iterator methods:
 // .map(), .filter(), .forEach() , .some(), .every()
 // Hint: You may also need SOME of the following methods:
 // Number(), .reverse(), typeof(), .join()

 // Let's say we have an array of prices named `prices`.
 var prices = ['100', '125', '129', '37', '38', '75', '87', '94', '300', '301',
 	'305', '50', '0.30', '0.01', '0.5', '5', '15', '24', '35', '1041', '1', '17',
 	'21', '28', '97', '6', '10', '49', '65', '89', '6', '10', '49', '65', '89'];

 // Question 1
 // Convert every price in `prices` into a number using a function that returns an array.
 // Store the resulting array in a variable named `numPricesArray`. You should not mutuate `prices`.
 // To see your work, log out the string "numPricesArray" and the actual variable afterwards.

 // WRITE QUESTION 1 ANSWER HERE

 var numPricesArray = prices.map(function(price){
 	return Number(price);
 });

 console.log("numPricesArray", numPricesArray);


 // Question 2
 // Check that all the elements in `numPricesArray` are numbers.
 // Your code will return a boolean, so store that boolean in a variable named `onlyPrices`.
 // Log out the string "onlyPrices" and the actual variable.
 // If the value of the `onlyPrices` is not true, your answer to question 1, question 2, or both is incorrect.

 // WRITE QUESTION 2 ANSWER HERE

 var onlyPrices = numPricesArray.every(function(elem){
 	return typeof elem;
 });

 console.log("onlyPrices", onlyPrices);

 // Question 3
 // At this point, we've confirmed that all the elements in `numPricesArray` are numbers.
 // Now that we've done that check, we can safely compare against those elements as numbers.
 // We're on a budget here so check if any of the prices are less than $25. Store this value in a variable named `cutoffPrice`.
 // Store the boolean in a variable named `lowPricesPresent`, and log it out like the previous questions.
 // Hint: Do not compare against "$25" or $25.
 // Hint: We can inspect the array with our eyes, so `lowPricesPresent` should be true.

 // WRITE QUESTION 3 ANSWER HERE

 var cutoffPrice = 25;

 var lowPricesPresent = numPricesArray.some(function(elem){
 	return elem < cutoffPrice;
 });

 console.log("lowPricesPresent", lowPricesPresent);

 // Question 4
 // Hey, we can buy things! Whoo!
 // Let's filter out all the prices that are greater than our cutoff.
 // (We're feeling splurgy, so our cutoff price is fair game.)
 // Store these prices in a variable named `inBudgetPrices`.
 // Be sure to log it out like the previous questions.

 // WRITE QUESTION 4 ANSWER HERE


 var inBudgetPrices = numPricesArray.filter(function(elem){
 	return elem < cutoffPrice;
 });

 console.log("inBudgetPrices", inBudgetPrices);

 // Question 5
 // The good news is we bought everything in `inBudgetPrices`.
 // The bad news is our accountant is a huge jerk, so we can't give him the array `inBudgetPrices`.
 // He wants a string of the prices, with each price separated by a comma and a space.
 // Store the string of the prices in a new variable with a name of your choosing.
 // Be sure to camelCase the variable name! Our accountant expects it.

 // WRITE QUESTION 5 ANSWER HERE

 var thingsWeBought = inBudgetPrices.join(", ");

 console.log("thingsWeBought", thingsWeBought)

 // Extra Credit 1 (OPTIONAL)
 // Create a new array that has "$" prepended before each price in `inBudgetPrices`.
 // What is the type of the elements in `inBudgetPrices` now?

 // WRITE EXTRA CREDIT 1 ANSWER HERE

 var budget = inBudgetPrices.map(function(elem){
 	return "$" + elem;
 });

 console.log("budget", budget);

 // Elements in inBudgetPrices are still numbers because they have not been mutated, we just mapped it

 // Extra Credit 2
 // Create a new array based off of `numPricesArray` that has:
 // * one "$" prepended before a price that is greater than or equal to 0
 // * two "$" prepended before a price that is greater than or equal to 10
 // * three "$" prepended before a price that is greater than or equal to 100

 // WRITE EXTRA CREDIT 2 ANSWER HERE

 var priceRatings = inBudgetPrices.map(function(elem){
 	switch (true){
 		case (elem >= 100):
 			return "$$$" + elem;
 			break;
 		case (elem >= 10):
 			return "$$" + elem;
 			break;
 		default:
 			return "$" + elem;
 	}
 });

 console.log("priceRatings", priceRatings);
	// Homework 1

	// Hint: You may need SOME of these array iterator methods:
	// .map(), .filter(), .forEach() , .some(), .every()
	// Hint: You may also need SOME of the following methods:
	// Number(), .reverse(), typeof(), .join()

	// Let's say we have an array of prices named `prices`.
	var prices = ['100', '125', '129', '37', '38', '75', '87', '94', '300', '301',
	'305', '50', '0.30', '0.01', '0.5', '5', '15', '24', '35', '1041', '1', '17',
	'21', '28', '97', '6', '10', '49', '65', '89', '6', '10', '49', '65', '89'];

	// Question 1
	// Convert every price in `prices` into a number using a function that returns an array.
	// Store the resulting array in a variable named `numPricesArray`. You should not mutuate `prices`.
	// To see your work, log out the string "numPricesArray" and the actual variable afterwards.

	// WRITE QUESTION 1 ANSWER HERE

	var numPricesArray = prices.map(function(price){
	return Number(price);
	});

	console.log("numPricesArray", numPricesArray);


	// Question 2
	// Check that all the elements in `numPricesArray` are numbers.
	// Your code will return a boolean, so store that boolean in a variable named `onlyPrices`.
	// Log out the string "onlyPrices" and the actual variable.
	// If the value of the `onlyPrices` is not true, your answer to question 1, question 2, or both is incorrect.

	// WRITE QUESTION 2 ANSWER HERE

	var onlyPrices = numPricesArray.every(function(elem){
	return typeof elem;
	});

	console.log("onlyPrices", onlyPrices);

	// Question 3
	// At this point, we've confirmed that all the elements in `numPricesArray` are numbers.
	// Now that we've done that check, we can safely compare against those elements as numbers.
	// We're on a budget here so check if any of the prices are less than $25. Store this value in a variable named `cutoffPrice`.
	// Store the boolean in a variable named `lowPricesPresent`, and log it out like the previous questions.
	// Hint: Do not compare against "$25" or $25.
	// Hint: We can inspect the array with our eyes, so `lowPricesPresent` should be true.

	// WRITE QUESTION 3 ANSWER HERE

	var cutoffPrice = 25;

	var lowPricesPresent = numPricesArray.some(function(elem){
	return elem < cutoffPrice;
	});

	console.log("lowPricesPresent", lowPricesPresent);

	// Question 4
	// Hey, we can buy things! Whoo!
	// Let's filter out all the prices that are greater than our cutoff.
	// (We're feeling splurgy, so our cutoff price is fair game.)
	// Store these prices in a variable named `inBudgetPrices`.
	// Be sure to log it out like the previous questions.

	// WRITE QUESTION 4 ANSWER HERE


	var inBudgetPrices = numPricesArray.filter(function(elem){
	return elem < cutoffPrice;
	});

	console.log("inBudgetPrices", inBudgetPrices);

	// Question 5
	// The good news is we bought everything in `inBudgetPrices`.
	// The bad news is our accountant is a huge jerk, so we can't give him the array `inBudgetPrices`.
	// He wants a string of the prices, with each price separated by a comma and a space.
	// Store the string of the prices in a new variable with a name of your choosing.
	// Be sure to camelCase the variable name! Our accountant expects it.

	// WRITE QUESTION 5 ANSWER HERE

	var thingsWeBought = inBudgetPrices.join(", ");

	console.log("thingsWeBought", thingsWeBought)

	// Extra Credit 1 (OPTIONAL)
	// Create a new array that has "$" prepended before each price in `inBudgetPrices`.
	// What is the type of the elements in `inBudgetPrices` now?

	// WRITE EXTRA CREDIT 1 ANSWER HERE

	var budget = inBudgetPrices.map(function(elem){
	return "$" + elem;
	});

	console.log("budget", budget);

	// Elements in inBudgetPrices are still numbers because they have not been mutated, we just mapped it

	// Extra Credit 2
	// Create a new array based off of `numPricesArray` that has:
	// * one "$" prepended before a price that is greater than or equal to 0
	// * two "$" prepended before a price that is greater than or equal to 10
	// * three "$" prepended before a price that is greater than or equal to 100

	// WRITE EXTRA CREDIT 2 ANSWER HERE

	var priceRatings = inBudgetPrices.map(function(elem){
	switch (true){
	case (elem >= 100):
	return "$$$" + elem;
	break;
	case (elem >= 10):
	return "$$" + elem;
	break;
	default:
	return "$" + elem;
	}
	});

	console.log("priceRatings", priceRatings);