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An introductory course on JavaScript covering basic topics.
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An introductory course on Ruby covering basic topics.
Questions on closures
Closures are an important topic to understand when learning JavaScript. Here are a few common closure questions with solutions.
10 common JavaScript interview questions
Some common interview questions with topics such as decimal numbers, scope, private variables, and more.
Map, reduce, and filter - functional programming
Introduction to functional programming methods in JavaScript.
Implement bubble sort
Code for implementing the simple but slow sorting algorithm, bubble sort.
Lucky sevens
Determine if three consecutive numbers in an array sum to seven.
Oddball sum
Practice coding question where you have to add up all the odd numbers in an array.
First Factorial
For this challenge you will be determining the factorial for a given number.
46834 solutions
Solution
Longest Word
For this challenge you will be determining the largest word in a string.
37015 solutions
Solution
Letter Changes
For this challenge you will be manipulating characters in a string based off their positions in the alphabet.
36509 solutions
Solution
Simple Adding
For this challenge you will be adding up all the numbers from 1 to a certain argument.
31208 solutions
Solution
Letter Capitalize
For this challenge you will be capitalizing certain characters in a string.
26662 solutions
Solution
Simple Symbols
For this challenge you will be determining whether or not certain characters are in correct positions.
20620 solutions
Solution
Check Nums
For this challenge you will be comparing two numbers and determining which one is greater.
22524 solutions
Solution
Time Convert
For this challenge you will be determining the difference in hours and minutes between two given times.
16903 solutions
Solution
Alphabet Soup
For this challenge you will be sorting characters in a string.
15992 solutions
Solution
Vowel Count
For this challenge you will be counting all the vowels in a string.
13831 solutions
Solution
Word Count
For this challenge you will be determining how many words a sentence contains.
13059 solutions
Solution
Palindrome
For this challenge you will determine if a string is written the same way forward and backwards.
14517 solutions
Solution
Array Addition I
For this challenge you will determine if numbers in an array can add up to a certain number in the array.
7024 solutions
Solution
Letter Count I
For this challenge you will determine which word has the greatest number of repeated letters.
6388 solutions
Solution
Second GreatLow
For this challenge you will determine the second lowest and greatest numbers in an array.
10913 solutions
Solution
Division Stringified
For this challenge you will divide two numbers and return them in a certain format.
8193 solutions
Solution
Counting Minutes I
For this challenge you will return the total number of minutes between two times.
4856 solutions
Solution
Dash Insert
For this challenge you will be manipulating a string using dashes (-).
7180 solutions
Solution
Number Addition
For this challenge you will traverse a string searching for all the numbers and then you will add them up.
6788 solutions
Solution
Third Greatest
For this challenge you will determine the third largest string within an array.
6287 solutions
Solution
Powers of Two
For this challenge you will be determining whether or not a number is a power of two.
7009 solutions
Solution
Additive Persistence
For this challenge you will be determining the additive persistence for a given number.
4815 solutions
Solution
Multiplicative Persistence
For this challenge you will be determining the multiplicative persistence for a given number.
3789 solutions
Solution
Off Line Minimum
For this challenge you will be creating a subset of an array.
5023 solutions
Solution
Changing Sequence
For this challenge you will determine when an array changes sequences.
1560 solutions
Solution
Overlapping Ranges
For this practice test you will determine the intersection between two sets.
1581 solutions
Solution
Superincreasing
For this challenge you will determine if each number is greater than the sum of all previous elements in an array.
1532 solutions
Solution
Hamming Distance
For this challenge you will determine the difference between two strings.
1048 solutions
Solution
Rectangle Area
For this challenge you will determine the area of a rectangle.
1273 solutions
Solution
Bitwise One
For this challenge you will perform a bitwise operation on two binary numbers.
1065 solutions
Solution
Other Products
For this challenge you will return the product of a set of elements in an array.
831 solutions
Solution
Wave Sorting
For this challenge you will determine if numbers in an array can be sorted in a particular way.
563 solutions
Solution
Array Matching
For this challenge you will add elements from two arrays in a particular order.
636 solutions
Solution
Longest Increasing Sequence
For this challenge you will compute the length of the longest increasing subsequence.
488 solutions
Solution
Even Pairs
For this challenge you will determine if a pair of even numbers exists somewhere in a string.
467 solutions
Solution
Next Palindrome
For this challenge you will be determining the next largest palindrome.
456 solutions
Solution
Largest Pair
For this challenge you will determine the largest double digit number.
613 solutions
Solution
Nonrepeating Character
For this challenge you will find the first non-repeating character in a string.
454 solutions
Solution
Bitwise Two
For this challenge you will perform a bitwise operation on two binary numbers.
310 solutions
Solution
Power Set Count
For this challenge you will determine the length of a power set.
471 solutions
Solution
Product Digits
For this challenge you will be determining the least amount of digits needed to produce a number.
595 solutions
Solution
Palindrome Creator
For this challenge you will be determining if you can create a palindrome from a list of numbers.
449 solutions
Solution
Basic Roman Numerals
For this challenge you will be converting a string of Roman numerals.
337 solutions
Solution
Food Distribution
For this challenge you will determine how to optimally distribute food to people.
224 solutions
Solution
Correct Path
For this challenge you will be traversing a matrix searching for the correct path to take.
141 solutions
Solution
Scale Balancing
For this challenge you will be balancing a scale with weights on it.
212 solutions
Solution
Three Numbers
For this challenge you will be searching for a set of numbers in a string.
216 solutions
Solution
Alphabet Searching
For this challenge you will determine if a set of characters exists in a string.
206 solutions
Solution
Time Difference
For this challenge you will be searching for the smallest time difference.
93 solutions
Solution
Triangle Row
For this challenge you will be adding up a whole row from Pascal's triangle.
107 solutions
Solution
Vowel Square
For this challenge you will determine if a square of vowels exists in a matrix.
134 solutions
Solution
Largest Four
For this challenge you will need to find the four largest elements in an array.
138 solutions
Solution
Distinct Characters
For this challenge you will determine if a string contains some number of distinct characters.
79 solutions
Solution
Questions Marks
For this challenge you will be determining if a string follows a particular pattern.
96 solutions
Solution
Camel Case
For this challenge you will be converting a string into camel case format.
93 solutions
Solution
ASCII Conversion
For this challenge you will be replacing certain characters in a string.
62 solutions
Solution
Simple Evens
For this challenge you will be checking whether a number is even.
92 solutions
Solution
Snake Case
For this challenge you will be converting a string into snake case format.
74 solutions
Solution
Sum Multiplier
For this challenge you will determine if two numbers can be multiplied to some specific number.
101 solutions
Solution
String Merge
For this challenge you will be merging two different strings together.
100 solutions
Solution
One Decremented
For this challenge you will be counting how many times a specific pattern occurs in a large number.
78 solutions
Solution
Element Merger
For this challenge you will be combining all of the elements in an array into a single number.
86 solutions
Solution