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Return Sum
<p>Create a function sum() that returns the sum of the two numbers passed as its arguments. For example, sum(2,5) should return 7; sum(3,10) should return 13. <br></p> -
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Countdown by 8
<p>Log positive numbers starting at 2019, counting down by 8.<a data-re-name="html" href="http://test.datacompass.io/hh/admin/3349/hh_ulD65vQw3zd3kB/1580433510148#" alt="HTML" rel="html" role="button" ... -
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Fahrenheit to Celcius
<p>Kelvin wants to convert between temperature scales. Create celciusToFahrenheit(cDegrees) that accepts a number of degrees in Celcius, and returns the equivalent temperature as expressed in Fahrenhe ... -
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Biggie Size
<p>Given an array, write a function that changes all positive numbers in the array to “big”. Example: makeItBig([-1,3,5,-5]) returns that same array, changed to [-1,"big","big",-5].</p> -
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Double Vision
<p>Given array, create a function to return a new array where each value in the original has been doubled. Calling double([1,2,3]) should return [2,4,6].</p> -
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Return Array Count Greater than Y
<p>Given an array and a value Y, count and return the number of array values greater than Y. For example, returnArrayCountGreaterThanY( [2,3,5], 4) should return 1 as there is only one element in the ... -
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Sigma
<p>Implement function sigma(num) that given a number, returns the sum of all positive integers up to number (inclusive). Ex.:sigma(3)=6(or1 + 2 + 3); sigma(5)=15(or1 + 2 + 3 + 4 + 5).</p> -
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Factorial
<p>Just the Facts, ma’am. Factorials, that is. Write a function factorial(num) that, given a number, returns the product (multiplication) of all positive integers from 1 up to number (inclusive). For ... -
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Swap Toward the Center
<p>Given array, swap first and last, second and second-to-last, third and third-to- last, etc. Have the function return this swapped array. For example swapTwoardCenter([true,42,"Ada",2,"pizza"] ... -
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Threes and Fives
<p>Create threesFives(n) that adds values from 1 and n (inclusive) if that value is not divisible by 3 or 5. Return the final sum.</p> <p>For example, threesFives(10) returns 22 as it only returns th ... -
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Fibonacci
<p>Create a function to generate Fibonacci numbers. In this famous mathematical sequence, each number is the sum of the previous two, starting with values 0 and 1. Your function should accept one argu ... -
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sumToOne
<p>Kaitlin sees beauty in numbers, but also believes that less is more. Implement sumToOne(num) that sums a given integer’s digits repeatedly until the sum is only one digit. Return that one-digit res ... -
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Clock Hand Angles (check)
<p>Regardless of how hard a Dojo student works (and they should work hard), they need time now and then to unwind – like hands on a clock. Traditional clocks are increasingly uncommon, but most can st ... -
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Is Prime
<p>Return whether a given integer is prime. Prime numbers are only evenly divisible by themselves and 1. Many highly optimized solutions exist, but for now just create one that is easy to understand a ... -
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Extract-o-matic
<p>Create the extractDigit(num,digitNum) function that given a number and a digit number, returns the numeral value of that digit. 0 represents the ones digit, 1 represents the tens digit, etc. Given ... -
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Array: Reverse
<p>Given a numerical array, reverse the order of values, in-place. The reversed array should have the same length, with existing elements moved to other indices so that order of elements is reversed. ... -
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Filter Range
<p>Alan is good at breaking secret codes. One method is to eliminate values that lie within a specific known range. Given arr and values min and max, retain only the array values between min and max. ... -
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Array: Concat
<p>Replicate JavaScript’s concat(). Create a standalone function that accepts two arrays. Return a new array containing the first array’s elements, followed by the second array’s elements. Do not alte ... -
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Skyline Heights
<p>Lovely Burbank has a breathtaking view of the Los Angeles skyline. Let’s say you are given an array with heights of consecutive buildings, starting closest to you and extending away. Array [-1,7,3] ... -
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Array: Second-to-Last
<p>Return the second-to-last element of an array. Given [42,true,4,"Kate",7], return "Kate". If array is too short, return null.</p> -
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Array: Nth-to-Last
<p>Return the element that is N-from-array’s-end. Given ([5,2,3,6,4,9,7],3), return 4. If the array is too short, return null.</p> -
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Array: Remove Range
<p>Given array, and indices start and end, remove vals in that index range, working in-place (hence shortening the array). Given ([20,30,40,50,60,70],2,4), change to [20,30,70] and return it.</p> -
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Credit Card Validation
<p>The Luhn formula is sometimes used to validate credit card numbers. Create the function isCreditCardValid(digitArr) that accepts an array of digits on the card (13-19 depending on the card), and re ... -
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Zip it
<p>Create a standalone function that accepts two arrays and combines their values sequentially into a new array, at <em>alternating indices </em>starting with first array. Extra values from either arr ... -
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Parens Valid
<p>Create a function that, given an input string <strong>str</strong>, returns a boolean whether parentheses in <strong>str </strong>are valid. Valid sets of parentheses always open before they close, ... -
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Bubble Sort
<p>Understanding how to implement basic sorting algorithm is a good exercise. For this particular challenge, you are to implement bubble sort.</p> <p>The animation below demonstrates how bubble sort ... -
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Multiple Table
<p>Create a function that prints a multiplication table such as follows:</p> <p>multiTable(2,2) should print</p> <p>1 2</p> <p>2 4</p> <p></p> <p>multiTable(3,3) should print</p> <p>1 2 3</p> < ... -
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Two Dimensional Array Part I
<p>Create a function that returns a two dimensional array containing bunch of zeros. For example twoDimensional(2,5) should return a following array:</p> <p>[</p> <p>[ 0, 0, 0, 0, 0],</p> <p>[ 0, 0 ... -
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Two Dimensional Array Part II
<p>Create a function twoDimensional(row, column) that returns a two dimensional array containing bunch of zeros but where the outer values are filled with ones. For example twoDimensional(5,5) should ...
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