DEV Community: Thiru Sakthi

Day 7

Thiru Sakthi — Mon, 13 Apr 2026 15:09:03 +0000

Work...

Day 6

Thiru Sakthi — Sun, 12 Apr 2026 16:16:38 +0000

Nothing...

Day 5 - Strings & Arrays Basics

Thiru Sakthi — Sat, 11 Apr 2026 17:56:25 +0000

Today I focused on strengthening core fundamentals using simple problems and for-loop logic.

🔁 Reverse a String
let val = "thiru";
let rev = "";

for(let i = val.length - 1; i >= 0; i--){
    rev += val[i];
}
console.log(rev);


🔍 Palindrome Check
function isPalindrome(val){
    let rev = "";

    for(let i = val.length - 1; i >= 0; i--){
        rev += val[i];
    }

    for(let i = 0; i < val.length; i++){
        if(val[i] !== rev[i]){
            return false;
        }
    }
    return true;
}
console.log(isPalindrome("val"));


🔤 Count Vowels & Consonants
function countVowels(str){
    const vowels = new Set("aeiou");
    let countV = 0;
    let countC = 0;

    for(let i = 0; i < str.length; i++){
        let ch = str[i].toLowerCase();

        if(ch >= "a" && ch <= "z"){
            if(vowels.has(ch)){
                countV++;
            } else {
                countC++;
            }
        }
    }
    return { vowels: countV, consonants: countC };
}

console.log(countVowels("aaa"));


🔄 Array → String
function arrToStr(arr){
    let newStr = "";

    for(let i = 0; i < arr.length; i++){
        newStr += arr[i];
    }

    return newStr;
}

console.log(arrToStr(["a", "a", "a"]));


🔄 String → Array
function strToArr(str){
    let newArr = [];

    for(let i = 0; i < str.length; i++){
        newArr.push(str[i]);
    }

    return newArr;
}

console.log(strToArr("aaa"));


🚫 Remove Duplicates
function removeDup(str){
    let result = "";

    for(let char of str){
        if(!result.includes(char)){
            result += char;
        }
    }

    return result;
}

console.log(removeDup("EDDA"));


🔁 Replace Characters
let value = "aaad";
let sValue = "a";
let rValue = "e";

let result = "";

for(let i = 0; i < value.length; i++){
    if(value[i] === sValue){
        result += rValue;
    } else {
        result += value[i];
    }
}

console.log(result);

🧠 What I Learned

Traversing strings and arrays using loops
Building results step by step
Handling edge cases (like non-letter characters)
Writing clean and readable logic

Day 4 – Array Problem Solving Practice (JavaScript)

Thiru Sakthi — Fri, 10 Apr 2026 12:46:12 +0000

Today I practiced multiple array and loop-based problems to strengthen my fundamentals.

💻 Problems Covered

Sum of array elements
Find max & min in array
Count even/odd numbers
Reverse an array
Remove duplicates
Search a specific element
Sliding window sum (basic idea)
Subarray sum calculation
Array rotation

🧠 Code Practice

// 1. Sum of array
let values = [1,2,3,4,5];
let result = 0;

for(let i = 0; i < values.length; i++){
    result += values[i];
}

console.log(result);


// 2. Find max
values = [1,2,3,4];
let max = values[0];

for(let i = 0; i < values.length; i++){
    if(values[i] > max){
        max = values[i];
    }
}

console.log(max);


// 3. Find min
values = [9,1,2,3,4];
let min = values[0];

for(let i = 0; i < values.length; i++){
    if(values[i] < min){
        min = values[i];
    }
}

console.log(min);


// 4. Count even / odd
values = [9,1,2,3,4];
let even = 0;
let odd = 0;

for(let i = 0; i < values.length; i++){
    if(values[i] % 2 === 0){
        even++;
    } else {
        odd++;
    }
}

console.log(even, odd);


// 5. Reverse array
values = [9,1,2,3,4];
let reversed = [];

for(let i = values.length - 1; i >= 0; i--){
    reversed.push(values[i]);
}

console.log(reversed);


// 6. Remove duplicates
values = [9,1,4,1,2,3,4];
let unique = [];

for(let i = 0; i < values.length; i++){
    if(!unique.includes(values[i])){
        unique.push(values[i]);
    }
}

console.log(unique);


// 7. Check if element exists
function findNumber(arr, num){
    for(let i = 0; i < arr.length; i++){
        if(arr[i] === num){
            return true;
        }
    }
    return false;
}


// 8. Sliding window sum (max sum)
values = [1,2,3,4];
let chunk = 3;
let maxSum = 0;

for(let i = 0; i <= values.length - chunk; i++){
    let sum = 0;

    for(let j = i; j < i + chunk; j++){
        sum += values[j];
    }

    maxSum = Math.max(maxSum, sum);
}

console.log(maxSum);


// 9. Array rotation (right rotate)
values = [1,2,3,4,5];

for(let i = 0; i < 2; i++){
    values.unshift(values.pop());
}

console.log(values);

🧠 What I Learned

Basic array traversal using loops
Difference between max/min logic
Using nested loops for sliding window
How array rotation works internally
Importance of avoiding duplicate values
Thinking in step-by-step logic

🔥 Key Takeaway

Most problems are just:

loop + condition + array manipulation

Once that pattern clicks, everything becomes easier.

💬 Note

Still learning, still improving.

Day 3 of Problem Solving

Thiru Sakthi — Thu, 09 Apr 2026 16:40:50 +0000

Today was mostly focused on office work, so I didn’t get time to solve new problems.

🧠 What I Realized

Even on busy days:

Staying consistent is important
Not every day needs to be intense
Progress also means showing up

💼 Reality Check

Balancing work + learning isn’t always easy.
Some days are for coding, some days are just for surviving deadlines.

💬 Note

Consistency > Perfection.
I’m still in the game.

Day 2 - Problem Solving

Thiru Sakthi — Wed, 08 Apr 2026 17:38:24 +0000

Today I worked on some basic JavaScript problems to strengthen my fundamentals.

const numbers = [1, 2, 3, 4, 3];
const text = "ABC";

// 1. Sum of array
let totalSum = 0;
for (let i = 0; i < numbers.length; i++) {
  totalSum += numbers[i];
}

// 2. Count even numbers
let evenCount = 0;
for (let i = 0; i < numbers.length; i++) {
  if (numbers[i] % 2 === 0) {
    evenCount++;
  }
}

// 3. Reverse string
const reversed = text.split("").reverse().join("");

// 4. Find largest number
let largest = numbers[0];
for (let i = 1; i < numbers.length; i++) {
  if (numbers[i] > largest) {
    largest = numbers[i];
  }
}

// 5. Remove duplicates
const unique = [...new Set(numbers)];

console.log(totalSum, evenCount, reversed, largest, unique);

🧠 What I Practiced

Looping through arrays
Finding even numbers using %
Reversing a string
Finding the largest value in an array
Removing duplicates using Set

Day 1 - Strengthening Fundamentals

Thiru Sakthi — Tue, 07 Apr 2026 13:20:48 +0000

I’m focusing on building a solid foundation. Today was all about revisiting core programming concepts in JavaScript.

Problems Covered

Printing numbers using loops
Working with even numbers
Classic FizzBuzz problem
Prime number validation

Code Implementation

// 1. Print numbers from 1 to 100 
for (let i = 1; i <= 100; i++) { console.log(i); }

// 2. Print all even numbers ≤ 1000 
for (let i = 2; i <= 1000; i += 2) { console.log(i); }

// 3. FizzBuzz (1 to 100) 
for (let i = 1; i <= 100; i++) 
{ if (i % 15 === 0) console.log("FizzBuzz"); 
else if (i % 3 === 0) console.log("Fizz"); 
else if (i % 5 === 0) console.log("Buzz"); 
else console.log(i); }

// 4. Prime number check  
function isPrime(n) 
{ if (n <= 1) return false; 
for (let i = 2; i < n; i++) 
{ if (n % i === 0) return false; } 
return true; } 

console.log(isPrime(17)); // true

My First Post on Dev.to

Thiru Sakthi — Mon, 06 Apr 2026 08:25:38 +0000

Hi, I’m Thiru, a Frontend Developer.

I’m passionate about writing clean, well-structured code and setting up proper scaffolds. But I’ve realized that perfection can kill consistency and focus.

That’s why I’m starting this challenge: to document what I do every day, technically—big or small. This is for my own reference and to help newcomers who are learning.

I’ll be sharing my progress daily, lessons learned, and any interesting insights along the way.