CodeWars Challenges: Visit Here

A repository filled with codewars challenges (katas).

How It's Made:

Tech used:

Everyday, the first thing I do is solve a Codewar!

Optimizations

I consistently refactor and optimize my code, sometimes for efficiency, sometimes for readability.

Codewars Kata Solutions

Index

• Kata Solutions
• Recent Learning Highlights
• Lessons Learned

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Kata Solutions

Kata File	Description	Key Concepts	Kyu
CreatePhoneNumber.js	-	-	-
Messi.goals.function.js	-	-	-
Unique-In-Order.js	-	-	-
areTheyTheSame.js	-	-	-
areYouPlayingBanjo.js	Return message based on whether name starts with 'R'	Conditional logic, string indexing	8kyu
binaryAddition.js	-	-	-
booleanValuesToStrings.js	Return "Yes" or "No" based on boolean value	Ternary operator, boolean evaluation	8kyu
breakCamelCase.js	Insert spaces before uppercase letters in camelCase	Regex lookahead /(?=[A-Z])/g, string replacement	6kyu
buildAPileOfCubes.js	-	-	-
convertAStringToNumber.js	-	-	-
countTheDivisorsOfANumber.js	-	-	-
countTheSmileyFaces.js	-	-	-
deoxyribonucleicAcid.js	-	-	-
doubleChar.js	-	-	-
findTheOddInt.js	-	-	-
findThePerfectSquare.js	-	-	-
grasshopperDebugSayHello.js	Fix function to return a greeting with the given name	String interpolation, return statement	8kyu
growthOfAPopulation.js	-	-	-
howGoodAreYouReally.js	Compare your score to the average of your class	reduce(), array length, arithmetic logic	8kyu
isItEven.js	-	-	-
jadenCasingStrings.js	-	-	-
keepUpTheHoop.js	Return motivational message based on number of hoops	Ternary operator	8kyu
listFiltering.js	-	-	-
makeUpperCase.js	Convert a string to uppercase	String methods	8kyu
oppositeNumber.js	-	-	-
parseNiceIntFromCharProblem.js	-	-	-
persistentBugger.js	-	-	-
printerErrors.js	-	-	-
returnNegative.js	Return the negative version of a number	Ternary operator, number comparison	8kyu
sentenceSmash.js	Join an array of words into a sentence	join() method	8kyu
shortestWord.js	-	-	-
squareEveryDigit.js	Square each digit and concatenate the results	String conversion, map, join, Number constructor	7kyu
squareSum.js	-	-	-
sumArrays.js	Return the sum of values in an array	reduce(), null checking	8kyu
sumOfTheFirstNthTermOfSeries.js	-	-	-
sumOfTwoLowestPositiveIntegers.js	Return the sum of the two smallest positive numbers	sort(), array slicing	7kyu
theHighestProfitWins.js	-	-	-
whoLikesIt.js	-	-	-
isIsogram.js	check if a string is an isogram using Set and case normalization	Set()	7kyu
Function 2 - squaring an argument	Return the square of a number using multiplication	square	8kyu
removeSmallest.js	Remove the smallest number from an array without mutating it	.indexOf(), .filter(), Math.min()	7kyu
isSquare.js	Check if a number is a perfect square	Math.sqrt(), Number.isInteger()	7kyu
arrayDiff.js	Remove all elements in A that exist in B	filter(), includes()	6kyu
countSheep.js	Count the number of true values in an array	.filter(), boolean logic	8kyu
bouncingBall.js	Count how many times a ball passes in front of a window while bouncing	while, Math, control flow	6kyu
twoSum.js	Find two indices whose values add up to the target	nested loops, indexing, array traversal	6kyu
isUpperCase.js	Add a custom method to String prototype to check if it's uppercase	String.prototype, this, .toUpperCase()	8kyu
noSpace.js	Remove all spaces from a string	.replace(), RegEx, .split().join()	8kyu
accum.js	Format string to accum pattern with upper + lower repeats	.map(), .repeat(), .toUpperCase()	7kyu
getMiddle.js	Return the middle character(s) of a string	substring(), Math.floor()	7kyu
alternatingCase.js	Convert each letter to its opposite case	String.prototype, .map(), .toUpperCase(), .toLowerCase()	8kyu
descendingOrder.js	Rearrange digits of a number in descending order	String(), .split(), .sort(), .reverse(), Number()	7kyu
countByX.js	Return the first n multiples of x in array form	for loop, .push(), multiplication	8kyu
directionsReduction.js	Simplify path by removing opposite directions	stack, object lookup, logic flow	5kyu
isAnagram.js	Check if two words are anagrams	.toLowerCase(), .split(), .sort(), .join()	7kyu
maxSequence.js	Find the maximum sum of a contiguous subarray	Kadane’s algorithm, greedy, subarray sum	5kyu
getSum.js	Return the sum of all integers between two numbers (inclusive)	Math.min(), Math.max(), for loop	7kyu
convertStringToCamelCase.js	Convert dash/underscore-delimited strings to camelCase	replace(), RegEx groups, callbacks	6kyu
extractTheDomainNameFromAUrl.js	Extract domain name from a full URL string	.replace(), .split()	5kyu
testing123.js	Add line numbers to a list of strings	for loop, .map(), string interpolation	7kyu
digitize.js	Convert a number into an array of its digits in reverse order	String(), .split(), .reverse(), .map(Number)	8kyu
categorizeNewMember.js → Categorize club members as 'Senior' or 'Open' based on age and handicap.
friendOrNot.js → Return only names with exactly 4 letters from a list.	filter()	7kyu
reverseListOrder.js → Reverse a given list using .reverse().
findTheMiddleElement.js	Return the index of the number that lies between the other two in a triplet	[...arr], .sort(), .indexOf()	8kyu
playingWithDigits.js	Return the multiplier k such that the powered digits of n equal k * n, or -1	Math.pow(), for loop, modulo %	6kyu
sortNumbers.js	Sort numbers in ascending order, return empty array if input is null	[...arr], .sort(), ternary ? :	8kyu
sumMixedArray.js	Sum numbers and strings as if all were numbers	.reduce(), Number()	8kyu
reverseWordsInAString.js	Reverse each word in a string without changing their order	.split(), .map(), .reverse(), .join()	7kyu
nameShuffler.js	Reverse order of first and last name in a string	.split(), .reverse(), .join()	8kyu
getLetterGrade.js	Return letter grade based on average of three scores	average calculation, if statements	8kyu
longestConsecutiveStrings.js	Return the longest string formed by k consecutive strings	.slice(), .join(), loop, length comparison	6kyu
gooseFilter.js	Filter out geese from an array of bird names	.filter(), .includes(), array exclusion	8kyu
crashOverride.js	Generate hacker alias based on name initials using predefined objects	.toUpperCase(), .match(), object lookup	8kyu
getVolumeOfCuboid.js	Calculate cuboid volume using a static method in a class	class, static, multiplication	8kyu
removeUrlAnchor.js	Remove everything after '#' in a URL string	.split(), [0], string manipulation	8kyu
findTheNeedle.js	Find the index of "needle" in an array and return message	.indexOf(), template literals	8kyu
endsWithCheck.js	Return true if string ends with given substring	.endsWith()	7kyu
greetUser.js	Greet user by name using template literals	template literals, string interpolation	8kyu
declareWinner.js	Determine winner between two fighters using turn-based attacks	class, .name, .damagePerAttack, loop logic	7kyu

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Recent Learning Highlights

• ✅ Applied lookahead regex /(?=[A-Z])/g to elegantly handle camel case separation.
• ✅ Improved test coverage awareness by identifying edge cases and suggesting enhancements in public kata repositories (e.g., makeNegative).
• ✅ Refactored conditional logic into concise, readable ternary expressions for functions like hoopCount.
• ✅ Regularly pushing kata solutions with commit messages and study guides following the PREP method for clarity and future review.
• ✅ Practicing deliberate problem-solving through classic loops, functional approaches, and edge-case analysis across JavaScript fundamentals.

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Lessons Learned

Solving is just the start.
I care about why things work, how clean the solution is, and how it could scale or integrate in real-world contexts.
Whether working solo or as part of a team, I focus on writing logic that’s intentional, consistent, and easy to build on.

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Bonus: Alternative Solutions

Explore extra versions, clever experiments, and one-liner variations in alt-solutions.js.

This file collects alternate solutions for katas already solved in the main table above. It’s a space for learning, exploring different approaches, and seeing how a single problem can be solved in multiple ways.

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