@stdlib/streams-node-stdin
v0.2.2
Published
Standard input.
Downloads
1,352,174
Readme
Standard Input
Installation
npm install @stdlib/streams-node-stdin
Usage
var stdin = require( '@stdlib/streams-node-stdin' );
stdin
Standard input as a Readable stream.
var string2buffer = require( '@stdlib/buffer-from-string' );
var Buffer = require( '@stdlib/buffer-ctor' );
var data = [];
var len = 0;
stdin.on( 'readable', onReadable );
stdin.on( 'error', onError );
stdin.on( 'end', onEnd );
function onReadable() {
var chunk;
while ( true ) {
chunk = stdin.read();
if ( chunk === null ) {
break;
}
if ( typeof chunk === 'string' ) {
chunk = string2buffer( chunk );
}
data.push( chunk );
len += chunk.length;
}
}
function onError( error ) {
if ( error ) {
console.error( error.message );
}
}
function onEnd() {
data = Buffer.concat( data, len );
console.log( data.toString() );
// => '...'
}
Examples
var proc = require( 'process' );
var stdin = require( '@stdlib/streams-node-stdin' );
var stdout = require( '@stdlib/streams-node-stdout' );
// Set the encoding:
stdin.setEncoding( 'utf8' );
// Create an echo stream:
stdin.pipe( stdout );
// Push data to `stdin`:
stdin.push( 'beep' );
stdin.push( ' ' );
stdin.push( 'boop' );
stdin.push( '\n' );
// End the stream:
stdin.push( null );
// Ensure the process closes:
setTimeout( proc.exit, 1000 );
Notice
This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
Community
License
See LICENSE.
Copyright
Copyright © 2016-2024. The Stdlib Authors.