Pick a challenge

Javascript basics

  1. Multiplication, division, and comparison operators
  2. Comparison operators, strict equality
  3. Check if a number is even
  4. Check if a number is a whole number
  5. Check whether a string contains another string and concatenate
  6. Find the correct word by incrementing letters in alphabet
  7. Find next higher natural number that is divisble by y
  8. Split a number into its digits
  9. Round a number to 2 decimal places
  10. Clear up the chaos behind these strings
  11. Return the percentage of a number
  12. How many times does a character occur?
  13. Return the next higher prime number

Javascript arrays

  1. Sort an array of strings alphabetically
  2. Sort an array of numbers in descending order
  3. Return the average of an array of numbers
  4. Return last n array elements
  5. Sum up all array elements with values greater than
  6. Check if all array elements are equal
  7. Create a range of numbers
  8. Remove a specific array element
  9. Return the longest string from an array of strings
  10. Merge an arbitrary number of arrays
  11. Merge two arrays with duplicate values

Javascript dates

  1. Check if two dates are equal
  2. Check if one date is earlier than another
  3. Check if two dates fall on the exact same day
  4. Return the number of days between two dates
  5. Add n days to an existing date
  6. Check if two dates are within 1 hour from each other
  7. Calculate difference between two dates in hours, minutes, and seconds

Javascript objects

  1. Accessing object properties one
  2. Accessing object properties two
  3. Accessing object properties three
  4. Remove a property from an object
  5. Swap object keys and values
  6. Add property to each object in array
  7. Merge two objects with matching keys
  8. Extracting information from objects
  9. Replace empty strings in object with null values

Javascript Sets

  1. Check if value is present in Set
  2. Convert a Set to Array
  3. Get union of two sets
  4. Delete element from Set
  5. Creating Javascript Sets
  6. Add multiple elements to Set
  7. Get Intersection of two Javascript Sets