https://github.com/borischumichev/node-nthline

Read nth line without reading entire file
https://github.com/borischumichev/node-nthline

node nodejs

Last synced: about 2 months ago
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Read nth line without reading entire file

• Host: GitHub
• URL: https://github.com/borischumichev/node-nthline
• Owner: BorisChumichev
• Created: 2017-04-27T19:04:49.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2019-12-10T17:22:10.000Z (about 5 years ago)
• Last Synced: 2024-11-06T08:53:29.236Z (2 months ago)
• Topics: node, nodejs
• Language: JavaScript
• Size: 10.7 KB
• Stars: 12
• Watchers: 3
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
# node-nthline [![Build Status](https://travis-ci.org/BorisChumichev/node-nthline.svg?branch=master)](https://travis-ci.org/BorisChumichev/node-nthline) [![Coverage Status](https://coveralls.io/repos/github/BorisChumichev/node-nthline/badge.svg)](https://coveralls.io/github/BorisChumichev/node-nthline)

`nthline` reads specific line from file without buffering the entire file to memory. Under the hood it uses Node’s [readline](https://nodejs.org/api/readline.html) module.

### Install

```

npm i -S nthline

```

### Usage

Module exposes a function with signature: `(rowIndex:Number, filePath:String) → Promise`. Row indexing is zero-based.

```javascript

const nthline = require('nthline'),

  filePath = '/path/to/100-million-rows-file',

  rowIndex = 42

console.log(await nthline(rowIndex, filePath))

```

Since it returns a promise you could rewrite previous example like that:

```javascript

const nthline = require('nthline'),

  filePath = '/path/to/100-million-rows-file',

  rowIndex = 42

nthline(rowIndex, filePath).then(console.log)

```