jschallenger

Elegant Solutions For jschallenger.com

Javascript Fundamentals

This series of JavaScript challenges covers basics like strings and operators, and includes exercises to test and reinforce the user's understanding of these concepts.

• Sum two numbers
• Get type of value
• Get nth character of string
• Remove first n characters of string
• Get last n characters of string
• Get first n characters of string
• Find the position of one string in another
• Extract first half of string
• Basic JavaScript math operators
• Remove last n characters of string
• Multiplication, division, and comparison operators
• Comparison operators, strict equality
• Check if a number is even
• Check if a number is a whole number
• Check whether a string contains another string and concatenate
• Round a number to 2 decimal places
• Find next higher natural number that is divisble by y
• Insert character after every n characters (backwards)
• Split a number into its digits
• Find the correct word by incrementing letters in alphabet
• Clear up the chaos behind these strings
• Return the percentage of a number
• How many times does a character occur?
• Return the next higher prime number

Javascript Arrays

This series of challenges tests your knowledge about Javascript arrays.

• Get nth element of array
• Remove first n elements of an array
• Get last n elements of an array
• Get first n elements of an array
• Sort an array of strings alphabetically
• Sort an array of numbers in descending order
• Calculate the sum of an array of numbers
• Return the average of an array of numbers
• Return last n array elements
• Sum up all array elements with values greater than
• Remove a specific array element
• Count number of elements in JavaScript array
• Count number of negative values in array
• Check if all array elements are equal
• Create a range of numbers
• Return the longest string from an array of strings
• Define an array with conditional elements
• Merge an arbitrary number of arrays
• Sort array by object property
• Merge two arrays with duplicate values
• Group array of strings by first letter.
• Get every nth element of array

Javascript Dates

This series of challenges tests your knowledge about Javascript dates.

• Return the next nearest quarter hour of a date
• Check if two dates fall on the exact same day
• Check if two dates are equal
• Check if one date is earlier than another
• Add n days to an existing date
• Check if two dates are within 1 hour from each other
• Return the number of days between two dates
• Calculate difference between two dates in hours, minutes, and seconds
• Return the next nearest quarter hour of a date

Javascript Objects

This series of challenges tests your knowledge about Javascript objects.

• Accessing object properties two
• Accessing object properties one
• Accessing object properties three
• Check if property exists in object
• Check if property exists in object and is truthy
• Creating Javascript objects one
• Creating Javascript objects two
• Creating Javascript objects three
• Extract keys from Javascript object
• Return nested object property
• Sum object values
• Remove a property from an object
• Swap object keys and values
• Add property to each object in array
• Merge two objects with matching keys
• Multiply all object values by x
• Extracting information from objects
• Replace empty strings in object with null values
• Convert array to object with counter

Javascript Sets

This series of challenges covers the Javascript Set object.

• Check if value is present in Set
• Convert a Set to Array
• Get union of two sets
• Creating Javascript Sets
• Delete element from Set
• Add multiple elements to Set
• [Get Intersection of two Javascript Sets](