An inverted index (also referred to as postings file or inverted file) is an index data structure storing a mapping from content, such as words or numbers, to its locations in a database file, or in a document or a set of documents (named in contrast to a Forward Index, which maps from documents to content). The purpose of an inverted index is to allow fast full text searches, at a cost of increased processing when a document is added to the database.

• Open your browser and visit the homepage
• Upload valid json book files
• Select an uploaded book file from the selector and click create index
• The index for the file is shown in tabular format with a search input field and search files selector
• Search for a text or sequence of text in a selected file or all files (from the selector)
• Click the search button and wait for the search results to be displayed

• Full text search
• Create index for multiple files
• Search through all created indexes or specific index (Multiple Search)
• Index for each file is created only once and stored in memory

inverted-index is implemented using a number of technologies:

• AngularJS - HTML enhanced for web apps!
• Twitter Bootstrap - great UI boilerplate for modern web apps
• node.js - evented I/O for the backend
• Gulp - the streaming build system
• karma - to automate testing
• jasmine - for writing the tests

• It doesn't save a search session
• Files must have a specific structure for index to be created

MIT