Welcome to AddZero

AddZero is a powerful library designed to simplify string manipulation by adding leading zeros to numbers and other essential tasks. With its wide range of API functions, AddZero proves to be a versatile tool for developers.

API Examples

1. addZero Function

Add leading zeros to a single number.

  
    const { addZero } = require('addzero');
    console.log(addZero(5)); // Output: 05
    console.log(addZero(123, 5)); // Output: 00123
  

2. addZeroToArray Function

Add leading zeros to an array of numbers.

  
    const { addZeroToArray } = require('addzero');
    console.log(addZeroToArray([1, 23, 456], 4)); // Output: ['0001', '0023', '0456']
  

3. addZeroToString Function

Add leading zeros to a string representation of a number.

  
    const { addZeroToString } = require('addzero');
    console.log(addZeroToString('9', 3)); // Output: 009
  

4. addZeroInRange Function

Add leading zeros to each number in a specified range.

  
    const { addZeroInRange } = require('addzero');
    console.log(addZeroInRange(1, 10, 3)); // Output: ['001', '002', '003', '004', '005', '006', '007', '008', '009', '010']
  

5. addZeroToObjectKeys Function

Add leading zeros to the numerical keys of an object.

  
    const { addZeroToObjectKeys } = require('addzero');
    const obj = { 1: 'one', 2: 'two' };
    console.log(addZeroToObjectKeys(obj, 3)); // Output: { '001': 'one', '002': 'two' }
  

App Example Using AddZero APIs

Now, let’s build a simple Node.js application that uses the AddZero library to format numerical data for display.

  
    const express = require('express');
    const { addZero, addZeroToArray, addZeroInRange } = require('addzero');
    
    const app = express();
    
    app.get('/format-number', (req, res) => {
      const number = parseInt(req.query.number || '0', 10);
      res.send(`Formatted Number: ${addZero(number, 4)}`);
    });
    
    app.get('/format-array', (req, res) => {
      const numbers = [5, 23, 345];
      res.send(`Formatted Array: ${addZeroToArray(numbers, 5)}`);
    });
    
    app.get('/format-range', (req, res) => {
      const start = parseInt(req.query.start || '1', 10);
      const end = parseInt(req.query.end || '10', 10);
      res.send(`Formatted Range: ${addZeroInRange(start, end, 3).join(', ')}`);
    });
    
    app.listen(3000, () => {
      console.log('Server is running on port 3000');
    });
  

With these examples, you can see how easy it is to integrate and use the AddZero library in your applications to ensure your numerical data is always formatted as needed.

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