node-nthline

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Read nth line without reading entire file

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# 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<String>`. 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)
```

node-nthline

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