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Challenges
2,421 JavaScript challenges
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Length of Worm
Hard
JavaScript
strings
Capital Split
Hard
JavaScript
strings
loops
Probabilities (Part 1)
Hard
JavaScript
arrays
math
Return the Index of All Capital Letters
Hard
JavaScript
strings
formatting
Check if the String is a Palindrome
Hard
JavaScript
strings
validation
GCD and LCM ( Part 1)
Hard
JavaScript
math
numbers
Moving to the End
Hard
JavaScript
arrays
higher_order_functions
Calculate the Shortest Distance Between Two Points
Hard
JavaScript
math
numbers
strings
Change Every Letter to the Next Letter
Hard
JavaScript
strings
formatting
cryptography
Check if a String is a Mathematical Expression
Hard
JavaScript
regex
validation
strings
GCD of Two Numbers
Hard
JavaScript
numbers
math
recursion
Sum of Odd and Even Numbers
Hard
JavaScript
arrays
data_structures
higher_order_functions
Numbers to Objects
Hard
JavaScript
arrays
interview
strings
Valid Hex Code
Hard
JavaScript
strings
regex
validation
Simon Says
Hard
JavaScript
arrays
validation
games
How Good is Your Name?
Hard
JavaScript
strings
validation
interview
Collatz Conjecture
Hard
JavaScript
control_flow
language_fundamentals
Card Counting (BlackJack)
Hard
JavaScript
algebra
games
conditions
Superheroes
Hard
JavaScript
arrays
regex
Grab the Numbers
Hard
JavaScript
strings
numbers
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