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export function formatFileSize(bytes: number): string {
  if (typeof bytes !== 'number' || isNaN(bytes) || bytes < 0) {
    return 'Invalid size';
  }

  const units = ['bytes', 'KB', 'MB', 'GB', 'TB'];
  let i = 0;

  while (bytes >= 1024 && i < units.length - 1) {
    bytes /= 1024;
    i++;
  }

  const value = i === 0 ? bytes : bytes.toFixed(2);
  return `${value} ${units[i]}`;
}


// Example usage:
console.log(formatFileSize(500));           // 500 B
console.log(formatFileSize(1536));          // 1.50 KB
console.log(formatFileSize(1048576));       // 1.00 MB
console.log(formatFileSize(1073741824));    // 1.00 GB
console.log(formatFileSize());    // "Invalid size"

JavaScript Node.js

File size bytes to a human-readable format

Common Conversions (Binary - Base 2) – m...

function sanitizeFilename(filename) {
  // Remove the extension
  const nameWithoutExt = filename.replace(/\.[^/.]+$/, '')

  // Replace all non-alphanumeric characters with hyphens
  const sanitized = nameWithoutExt.replace(/[^a-zA-Z0-9]+/g, '-').replace(/^-+|-+$/g, '')

  return sanitized
}

// Example usage
const input = "Mahbub-hasan.Hira.jpg";
const result = sanitizeFilename(input);
console.log(result); // Output: Mahbub-hasan-Hira

JavaScript Express.js

Get the filename without extension

1. firstly we remove the extension by r...

const generateUsername = email =>
  email.split('@')[0].replace(/[^a-zA-Z0-9]/g, '') + '_' + Math.random().toString(36).slice(2, 6);

// Example
console.log(generateUsername('john.doe@example.com')); // output ==>  johndoe_ab3x

JavaScript Node.js

Generate a unique username from email

How it works: 1. split('@')[0]: takes th...

package main

import "fmt"

// Define Reverse as a top-level function
func Reverse(s string) string {
	runes := []rune(s)
	for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
		runes[i], runes[j] = runes[j], runes[i]
	}
	return string(runes)
}

func main() {
	// Call the Reverse function from main
	fmt.Println(Reverse("Mahbub"))
}

Reverse a string in Go.

This function takes a string and returns...

<?php

// your code goes here
function generatePassword($length = 12) {
    return bin2hex(random_bytes($length / 2));
}

 const password = generatePassword();

PHP

Generate a secure random password in php

This function generates a cryptographica...

def flatten(lst):
    result = []
    for i in lst:
        if isinstance(i, list):
            result.extend(flatten(i))
        else:
            result.append(i)
    return result

Python

Flatten a list of arbitrarily nested lists into a flat list in python

This recursive function takes a list wit...

import { useRouter } from 'next/router';

const Component = () => {
  const router = useRouter();
  console.log(router.pathname);
  return <div>{router.pathname}</div>;
};

Next.js

Get Current Route Path in Nextjs

Get the current route path in a Next.js ...

<?php

function capitalizeFirstLetter($string) {
    return ucfirst(strtolower($string));
}

echo capitalizeFirstLetter("mahbub");  // Mahbub

PHP

Capitalize First Letter in PHP

Change the passed parameter "mahbub" wit...

from datetime import datetime, date

default_format_to = "%Y-%m-%d" #ayou can change it to any format "%d-%m-%Y", "%m-%d-%Y"

def format_date(input_date, format_to = default_format_to):
    if isinstance(input_date, datetime):
        dt = input_date
    elif isinstance(input_date, date):
        dt = datetime.combine(input_date, datetime.min.time())
    elif isinstance(input_date, str):
        # Try multiple common date string formats
        for fmt in ("%Y-%m-%d", "%d-%m-%Y", "%m-%d-%Y", "%d/%m/%Y", "%m/%d/%Y"):
            try:
                dt = datetime.strptime(input_date, fmt)
                break
            except ValueError:
                continue
        else:
            raise ValueError(f"Unsupported date format: {input_date}")
    else:
        raise TypeError(f"Unsupported type: {type(input_date)}")
    
    return dt.strftime(format_to)


print(format_date("05-04-2022", default_format_to))         # 2022-04-05
print(format_date("2022-04-05"))                            # 2022-04-05
print(format_date(date(2022, 9, 19), default_format_to))    # 2022-09-19
print(format_date(datetime(2021, 4, 5)))                    # 2022-04-05

Python

Format Date as YYYY-MM-DD in Python

Format a date object into any format def...

// Function to sanitize a slug for URLs
export const sanitizeSlug = (slug) => {
  if (!slug) return "";
  return slug
    ?.trim() // Trim whitespace from the beginning and end
    .toLowerCase() // Convert to lowercase
    .replace(/[^a-z0-9\s-]/g, "") // Remove special characters except spaces and hyphens
    .replace(/\s+/g, "-") // Replace spaces with hyphens
    .replace(/-+/g, "-"); // Replace multiple hyphens with a single hyphen
};

JavaScript

Slugify a String in Javascript

Convert a string into a clean URL-friend...

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