doublechar

A simple Node.js utility that reads a file, doubles every character, and writes the transformed result into a new file.

Installation

npm install doublechar

Usage

const doubleChar = require("doublechar");

// Input file: input.txt
// Content: "Hello"
doubleChar("input.txt", "output.txt");

// Output file: output.txt
// Content: "HHeelllloo"

API

doubleChar(inputFile, outputFile)

inputFile (string) – Path to the file to read.

outputFile (string) – Path to the file to write transformed output.

The function uses Node.js streams under the hood, making it memory-efficient even for large files.

Example

const doubleChar = require("doublechar");

doubleChar("./example.txt", "./example-doubled.txt");

If example.txt contains:

abc

Then example-doubled.txt will contain:

aabbcc

License

ISC ©