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Challenges
2,421 JavaScript challenges
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String to Phone Number
Hard
JavaScript
arrays
strings
numbers
24-Hour Time
Hard
JavaScript
strings
numbers
dates
The Magic Square Game
Hard
JavaScript
algorithms
math
validation
Broken Bridge
Hard
JavaScript
arrays
validation
higher_order_functions
Souvenir Shop
Hard
JavaScript
loops
arrays
algorithms
Through the Grid
Hard
JavaScript
algorithms
numbers
logic
Highest Pair
Hard
JavaScript
arrays
conditions
games
List Up an Array of Strings in a Proper Way
Hard
JavaScript
strings
arrays
What's the Closest Major Event?
Hard
JavaScript
arrays
objects
dates
Clock Hands
Hard
JavaScript
math
numbers
RGB or Hex Colour
Hard
JavaScript
formatting
numbers
Repeat a Char
Hard
JavaScript
algorithms
Pascal's Triangle
Hard
JavaScript
math
numbers
algebra
Cleaning Project Files
Hard
JavaScript
strings
regex
Even vs. Odds
Hard
JavaScript
arrays
higher_order_functions
logic
Programming Polyglot
Hard
JavaScript
numbers
arrays
bit_operations
Fibonacci String
Hard
JavaScript
arrays
strings
Simplifying to Simplest Ratio
Hard
JavaScript
math
strings
numbers
I Made a Mistake 😭
Hard
JavaScript
arrays
strings
The Fiscal Code (Part II): the Check Letter
Hard
JavaScript
strings
algorithms
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