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Challenges
2,421 JavaScript challenges
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JavaScript
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Count Letters in a Word Search
Hard
JavaScript
arrays
higher_order_functions
Power of Two
Hard
JavaScript
numbers
math
validation
Find the Bugs: Returning Valid Prices
Hard
JavaScript
bugs
conditions
control_flow
Remove Repeated Characters
Hard
JavaScript
strings
data_structures
Distance Between Two Points
Hard
JavaScript
math
algebra
language_fundamentals
Scalable Mountain?
Hard
JavaScript
loops
arrays
numbers
Burglary Series (03): Is It Gone?
Hard
JavaScript
objects
strings
Ageing the Population...
Hard
JavaScript
numbers
objects
Virtual DAC
Hard
JavaScript
functional_programming
Check if One Array is a Subset of Another
Hard
JavaScript
arrays
logic
validation
XOR Swap Algorithm
Hard
JavaScript
bit_operations
language_fundamentals
Alternating Ones and Zeroes
Hard
JavaScript
strings
validation
logic
How Many Solutions Does This Quadratic Have?
Hard
JavaScript
algebra
math
algorithms
Syncopated Rhythm
Hard
JavaScript
strings
loops
validation
Switcharoo
Hard
JavaScript
strings
arrays
conditions
Days in a Month
Hard
JavaScript
conditions
dates
Fix the Spacing
Hard
JavaScript
strings
formatting
RegEx XIV: Group Ranges - Character Sets
Hard
JavaScript
regex
Reverse Titling
Hard
JavaScript
language_fundamentals
strings
Scoring System
Hard
JavaScript
strings
numbers
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