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2,421 JavaScript challenges
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Ice Cream Stand
Hard
JavaScript
arrays
math
Consonant-Vowel Coding
Hard
JavaScript
strings
regex
higher_order_functions
A Week Later
Hard
JavaScript
dates
strings
formatting
Burrows-Wheeler Transform
Hard
JavaScript
cryptography
formatting
strings
Find the Lost Dog
Hard
JavaScript
loops
math
language_fundamentals
Moran Numbers
Hard
JavaScript
algebra
math
numbers
Sort by Digit Length, then By Number Itself
Hard
JavaScript
sorting
arrays
Time Around the World
Hard
JavaScript
dates
formatting
XOR Cipher
Hard
JavaScript
cryptography
algorithms
strings
ABA Integers: the Undulating Numbers
Hard
JavaScript
numbers
conditions
regex
Digits Battle!
Hard
JavaScript
numbers
games
loops
Generate an Array of 15 Palindrome Numbers
Hard
JavaScript
algorithms
arrays
numbers
Mystery Challenge
Hard
JavaScript
algorithms
loops
Swap X and Y Coordinates
Hard
JavaScript
strings
regex
3D Visual Block Sequence
Hard
JavaScript
math
numbers
algorithms
Subtract Without Subtract
Hard
JavaScript
numbers
math
bit_operations
Reverse Letters, Keep Numbers in Place
Hard
JavaScript
strings
logic
formatting
Closing in Sum
Hard
JavaScript
algorithms
recursion
loops
Current Streak
Hard
JavaScript
dates
loops
objects
Growing and Shrinking Potions
Hard
JavaScript
strings
higher_order_functions
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