# lifo > A Last In First Out (stack) implementation Latest version **0.0.2** (published 2014-09-08) · 0 weekly downloads ## Install ```sh npm install lifo pnpm add lifo yarn add lifo bun add lifo ``` ## Health **Score 15/100 (F)** — status: abandoned. Positive: no vulnerabilities. Warnings: low downloads; no types; no esm support; pre 1.0. Negative: abandoned; low maintenance score. ## Facts | | | |---|---| | Version | 0.0.2 | | Published | 2014-09-08 | | First published | 2014-09-08 | | Weekly downloads | 0 | | TypeScript types | none | | Module format | CommonJS | | Node | >= 0.10.0 | | Dependencies | 2 | | Known vulnerabilities | 0 | | Install scripts | no | | GitHub stars | 1 | | Author | Anshul Verma | | Maintainers | anshulverma | | Keywords | coffee-script, grunt, collections, stack, data-structure, coverage | ## Links - npm: https://www.npmjs.com/package/lifo - Repository: https://github.com/anshulverma/lifo - Issues: https://github.com/anshulverma/lifo/issues - npm.io page: https://npm.io/package/lifo ## Dependencies (2) - [debug](https://npm.io/package/debug.md) ^2.0.0 - [conditional](https://npm.io/package/conditional.md) ^4.2.0 ## Alternatives - [gamedig](https://npm.io/package/gamedig.md) — 29.3K weekly downloads - [join-monster](https://npm.io/package/join-monster.md) — 12.8K weekly downloads - [masked](https://npm.io/package/masked.md) — 5.5K weekly downloads - [@comunica/actor-query-process-explain-logical](https://npm.io/package/@comunica/actor-query-process-explain-logical.md) — 4.7K weekly downloads - [@veracity/vui](https://npm.io/package/@veracity/vui.md) — 4.6K weekly downloads ## Recent versions - 0.0.2 (latest) — 2014-09-08 - 0.0.1 — 2014-09-08 ## README LIFO ================== [![Build Status](https://travis-ci.org/anshulverma/lifo.svg?branch=master)](https://travis-ci.org/anshulverma/lifo) [![Dependency Status](https://gemnasium.com/anshulverma/lifo.svg)](https://gemnasium.com/anshulverma/lifo) [![Coverage Status](https://img.shields.io/coveralls/anshulverma/lifo.svg)](https://coveralls.io/r/anshulverma/lifo?branch=master) [![NPM version](https://badge.fury.io/js/lifo.svg)](http://badge.fury.io/js/lifo) [![NPM](https://nodei.co/npm/lifo.png?stars=true&downloads=true)](https://nodei.co/npm/lifo/) **Table of Contents** - [LIFO](#lifo) - [Summary](#summary) - [Installation](#installation) - [Usage](#usage) - [Building](#building) - [Testing](#testing) - [Documentation](#documentation) - [Build + Test + Document](#build--test--document) - [Contributing](#contributing) - [Author](#author) - [License](#license) ## Summary This is a LIFO (stack) implementation along with all the basic operations that come with it. Currently these operations are supported on the stack data structure: + `size` : get the count of elements on the stack + `isEmpty`: check if the stack is empty or not + `push` : push a element on the stack (returns the size after pushing) + `peek` : peek (without removing) the element that the next `pop` call will return + `pop` : pop and get the last pushed element from the stack ## Installation ``` bash $ npm install lifo ``` ## Usage Here is a example usage (output are shown in comments): ``` js var lifo = require('lifo'); lifo.push('some string'); console.log(lifo.peek()); // some string lifo.push(100); console.log(lifo.size()); // 2 console.log(lifo.pop()); // 100 ``` ## Debug If you want to enable debug output for this module, just set environment variable `DEBUG` to `"lifo"`. This will print log messages that might look like this (taken from the test output of this module): ![Sample debug output](https://raw.githubusercontent.com/anshulverma/lifo/master/docs/images/debug-sample.png "Sample of debug output") ## Building To get the js source generated form coffee script: ``` bash $ grunt coffee ``` This will put all js files in `lib` folder. ## Testing To execute tests, make sure [grunt](https://github.com/gruntjs/grunt-cli) is installed. Then run: ``` bash $ grunt test ``` Before testing, this task will perform a lint check using [coffeelint](http://www.coffeelint.org/). Tests will be executed if and only if linting succeeds. The `default` task of `grunt` will run this command as well. So, just typing `grunt` and pressing RET is also sufficient to run tests. ## Documentation Documentation is generated using [docco](https://github.com/jashkenas/docco) and placed in `docs` folder. To build documentation: ``` bash $ grunt docs ``` ## Build + Test + Document The `build` task of `grunt` will check linting, test everything, generate docs and build javascript source. So, to execute: ``` bash $ grunt build ``` ## Contributing Feel free to make a change and issue a pull request if you have a patch. If you have a feature request or if you find a bug, please open a issue. ## Author [Anshul Verma](http://anshulverma.github.io/) :: [anshulverma](https://github.com/anshulverma) :: [@anshulverma](http://twitter.com/anshulverma) ## License The MIT License (MIT) Copyright (c) 2014 Anshul Verma Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. --- _Source: https://npm.io/package/lifo · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._