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radix-tree

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radix-tree

Node.js version of a radix tree usable for routers or url path based storage.

  • 0.3.4
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radix-tree Build Status Coverage Status

Designed for usage in a router. Supports static paths with and without parameters/catchalls

Install

npm install radix-tree

Usage

Adding

const Tree = require('radix-tree').Tree

const instance = new Tree()

instance.add('/my_path', 'data')

console.log(instance.find('/my_path').data) // will output "data"

The second parameter in Tree.add() can be anything, a string, a function or an object. The stored path, data and contained parameters will be returned via Tree.find().

Removing

instance.remove('/my_path')

Will remove /my_path from the tree. Removing deeper paths like

instance.add('/my_path')
instance.add('/my_path/sub_path')

instance.remove('/my_path/sub_path') // will only remove /sub_path

Clearing

Its also possible to clear all routes at once.

instance.removeAll()

Priority

With version 0.2.0 routes are internally sorted by priority and no longer handled FIFO, routes with many childs have a higher priority and are scanned earlier.

Adding first /users and then /cart/add and /cart/remove will result in reordering of the children and place cart before users.Expl

(3) /
(2)   cart/
(1)     add
(1)     remove
(1)   users

Static routes

A static route can be any type of endpoint of a service, valid examples are:

  • /any_cool_file.html
  • /api/endpoint
  • /users/testuser/avatar.jpg

Static routes are the easiest to and fastest to lookup.

Routes including parameters

Parameters are dynamic parts of a url and terminated either by the end of the passed path or a /. A usage might be for a simple REST-API.

  • /api/users/:userId
  • /cms/:pageName

Tree.find() will contain now the params key with all found parameters and their corresponding values.

Routes including catchalls

Catchalls are a special type of parameters, they will match everything and only be terminated by the end of the passed path. Usage could be in a router to catch deep paths like a CDN or a full API, without caring for the structure.

  • /api/user/*api
  • /images/*path

Tree.find() will contain now the params key with all found parameters and their corresponding values.

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Package last updated on 31 Jan 2016

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