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Completed Projects w/ Matt Jackson #18

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nomyard wants to merge 7 commits into from
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Completed Projects w/ Matt Jackson #18

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Complete Project
nomyard Aug 7, 2017
702bfc7
project 2 completed in es6
Mjax511 Aug 7, 2017
f040d2b
testing
nomyard Aug 7, 2017
04cca0e
Merge branch 'master' of https://github.com/nomyard/Basic-JavaScript
nomyard Aug 7, 2017
5293eba
Complete Homework
nomyard Aug 8, 2017
d73f8b0
completed all projects
Mjax511 Aug 8, 2017
dfd17e6
changes es6 shorthand
Mjax511 Aug 8, 2017
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43 changes: 43 additions & 0 deletions 43 src/project-1.js
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Original file line number Diff line number Diff line change
Expand Up @@ -3,137 +3,180 @@
const multiplyByTen = (num) => {
// return num after multiplying it by ten
// code here
return num * 10;
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@SunJieMing SunJieMing Aug 19, 2017

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This is fine but you can also simplify the whole function to look like this:

const multiplyByTen = (num) => num * 10;

The value is automatically returned.

};

const subtractFive = (num) => {
// return num after subtracting five
// code here
return num - 5;
};

const areSameLength = (str1, str2) => {
// return true if the two strings have the same length
// otherwise return false
// code here
if (str1.length === str2.length) {
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@SunJieMing SunJieMing Aug 19, 2017

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Whenever you have an if statement for returning true or false you can usually simplify it to something like this:
return str1.length === str2.length;

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@SunJieMing SunJieMing Aug 19, 2017

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The expression is automatically simplified to either a true or a false

return true;
}
return false;
};

const areEqual = (x, y) => {
// return true if x and y are the same
// otherwise return false
// code here
if (x === y) {
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@SunJieMing SunJieMing Aug 19, 2017

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Same here, just do return x === y;

return true;
}
return false;
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@SunJieMing SunJieMing Aug 19, 2017

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This whole function could be simplified to: const areEqual = (x, y) => x === y;

};

const lessThanNinety = (num) => {
// return true if num is less than ninety
// otherwise return false
// code here
if (num < 90) {
return true;
}
return false;
};

const greaterThanFifty = (num) => {
// return true if num is greater than fifty
// otherwise return false
// code here
if (num > 50) {
return true;
}
return false;
};

const add = (x, y) => {
// add x and y together and return the value
// code here
return x + y;
};

const subtract = (x, y) => {
// subtract y from x and return the value
// code here
return x - y;
};

const divide = (x, y) => {
// divide x by y and return the value
// code here
return x / y;
};

const multiply = (x, y) => {
// multiply x by y and return the value
// code here
return x * y;
};

const getRemainder = (x, y) => {
// return the remainder from dividing x by y
// code here
return x % y;
};

const isEven = (num) => {
// return true if num is even
// otherwise return false
// code here
if (num % 2 === 0) {
return true;
}
return false;
};

const isOdd = (num) => {
// return true if num is odd
// otherwise return false
// code here
if (num % 2 !== 0) {
return true;
}
return false;
};

const square = (num) => {
// square num and return the new value
// code here
return Math.pow(num, 2);
};

const cube = (num) => {
// cube num and return the new value
// code here
return Math.pow(num, 3);
};

const raiseToPower = (num, exponent) => {
// raise num to whatever power is passed in as exponent
// code here
return Math.pow(num, exponent);
};

const roundNumber = (num) => {
// round num and return it
// code here
return Math.round(num);
};

const roundUp = (num) => {
// round num up and return it
// code here
return Math.ceil(num);
};

const addExclamationPoint = (str) => {
// add an exclamation point to the end of str and return the new string
// 'hello world' -> 'hello world!'
// code here
return `${str}!`;
};

const combineNames = (firstName, lastName) => {
// return firstName and lastName combined as one string and separated by a space.
// 'Lambda', 'School' -> 'Lambda School'
// code here
return `${firstName} ${lastName}`;
};

const getGreeting = (name) => {
// Take the name string and concatenate other strings onto it so it takes the following form:
// 'Sam' -> 'Hello Sam!'
// code here
return `Hello ${name}!`;
};

// If you can't remember these area formulas then head over to Google or look at the test code.

const getRectangleArea = (length, width) => {
// return the area of the rectangle by using length and width
// code here
return length * width;
};

const getTriangleArea = (base, height) => {
// return the area of the triangle by using base and height
// code here
return (base * height) / 2;
};

const getCircleArea = (radius) => {
// return the rounded area of the circle given the radius
// code here
return Math.round(Math.PI * Math.pow(radius, 2));
};

const getRectangularPrismVolume = (length, width, height) => {
// return the volume of the 3D rectangular prism given the length, width, and height
// code here
return length * width * height;
};

// Do not modify code below this line.
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77 changes: 77 additions & 0 deletions 77 src/project-2.js
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,10 @@
const getBiggest = (x, y) => {
// x and y are integers. Return the larger integer
// if they are the same return either one
if (x > y) {
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@SunJieMing SunJieMing Aug 19, 2017

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I usually like to simplify if statements like this to look a little different:

if (x > y) return x;
return y;

You could also use a ternary operator:

return x > y ? x : y;

Which would simplify to const getBiggest = (x, y) => x > y ? x : y;

return x;
}
return y;
};

const greeting = (language) => {
Expand All @@ -11,15 +15,31 @@ const greeting = (language) => {
// language: 'Spanish' -> 'Hola!'
// language: 'Chinese' -> 'Ni Hao!'
// if language is undefined return 'Hello!'
if (language === 'German') {
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@SunJieMing SunJieMing Aug 19, 2017

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Great, you could use a switch statement here too

return 'Guten Tag!';
} else if (language === 'Spanish') {
return 'Hola!';
} else if (language === 'Chinese') {
return 'Ni Hao!';
}
return 'Hello!';
};

const isTenOrFive = (num) => {
// return true if num is 10 or 5
// otherwise return false
if (num === 10 || num === 5) {
return true;
}
return false;
};

const isInRange = (num) => {
// return true if num is less than 50 and greater than 20
if (num < 50 && num > 20) {
return true;
}
return false;
};

const isInteger = (num) => {
Expand All @@ -29,13 +49,25 @@ const isInteger = (num) => {
// -10 -> true
// otherwise return false
// hint: you can solve this using Math.floor
if (Math.floor(num) === num) {
return true;
}
return false;
};

const fizzBuzz = (num) => {
// if num is divisible by 3 return 'fizz'
// if num is divisible by 5 return 'buzz'
// if num is divisible by 3 & 5 return 'fizzbuzz'
// otherwise return num
if (num % 3 === 0 && num % 5 === 0) {
return 'fizzbuzz';
} else if (num % 5 === 0) {
return 'buzz';
} else if (num % 3 === 0) {
return 'fizz';
}
return num;
};

const isPrime = (num) => {
Expand All @@ -44,62 +76,107 @@ const isPrime = (num) => {
// hint: a prime number is only evenly divisible by itself and 1
// hint2: you can solve this using a for loop
// note: 0 and 1 are NOT considered prime numbers
if (num === 2) {
return true;
} else if (num === 0 || num === 1 || num % 2 === 0) {
return false;
}
for (let i = 3; i < num; i++) {
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@SunJieMing SunJieMing Aug 19, 2017

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You could also have this skip all even numbers: i += 2 instead of i++

if (num % i === 0) {
return false;
}
}
return true;
};

const returnFirst = (arr) => {
// return the first item from the array
return arr[0];
};

const returnLast = (arr) => {
// return the last item of the array
return arr[arr.length - 1];
};

const getArrayLength = (arr) => {
// return the length of the array
return arr.length;
};

const incrementByOne = (arr) => {
// arr is an array of integers
// increase each integer by one
// return the array
for (let i = 0; i < arr.length; i++) {
arr[i] += 1;
}
return arr;
};

const addItemToArray = (arr, item) => {
// add the item to the end of the array
// return the array
arr.push(item);
return arr;
};

const addItemToFront = (arr, item) => {
// add the item to the front of the array
// return the array
// hint: use the array method .unshift
arr.unshift(item);
return arr;
};

const wordsToSentence = (words) => {
// words is an array of strings
// return a string that is all of the words concatenated together
// spaces need to be between each word
// example: ['Hello', 'world!'] -> 'Hello world!'
let everyWord = words[0];
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@SunJieMing SunJieMing Aug 19, 2017

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You can use reduce here.

for (let i = 1; i < words.length; i++) {
everyWord += ` ${words[i]}`;
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@SunJieMing SunJieMing Aug 19, 2017

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You shouldn't need to wrap words[i] in the template literal. Just do +=. Maybe the linter was barking at you though

}
return everyWord;
};

const contains = (arr, item) => {
// check to see if item is inside of arr
// return true if it is, otherwise return false
return arr.includes(item);
};

const addNumbers = (numbers) => {
// numbers is an array of integers.
// add all of the integers and return the value
let sum = 0;
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@SunJieMing SunJieMing Aug 19, 2017

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This is also a great time to use Array.reduce. It's fine that you didn't but now that you're becoming more advanced this is where you should use it

for (let i = 0; i < numbers.length; i++) {
sum += numbers[i];
}
return sum;
};

const averageTestScore = (testScores) => {
// testScores is an array. Iterate over testScores and compute the average.
// return the average
let sum = 0;
for (let i = 0; i < testScores.length; i++) {
sum += testScores[i];
}
return sum / testScores.length;
};

const largestNumber = (numbers) => {
// numbers is an array of integers
// return the largest integer
let largest = 0;
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@SunJieMing SunJieMing Aug 19, 2017

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You could use reduce or forEach here.

for (let i = 0; i < numbers.length; i++) {
if (numbers[i] > largest) {
largest = numbers[i];
}
}
return largest;
};

// Do not modify code below this line.
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