level-inverted-index

Inverted Index for levelup.

Example

With prewired defaults!

`` js

var indexDb = InvertedIndex(db, 'index')

//get list of documents containing 'search' and 'term'
indexDb.query(['search', 'term'], function (err, docs){
console.log(docs)
})

//stream stubs of documents
indexDb.createQueryStream(['search', 'term'])
.on('data', console.log)
`

Configurable!

` js

var indexDb = InvertedIndex(db, 'index',

//extract words from documents

function map(key, value, index) {
//parse, and pull out any bits of text you want,
//call index with an index and a rank!

//here we split by anything that is not a letter
//or a number
index(value.split(/[^\w\d]+/))
},

//when quering with createQueryStream,
//stub converts from each doc, to a short preview.
//Possibly, highlighting matches with the query!
function stub(doc, query) {
return doc.substring(0, 140) + '...\n'
})

`

insert documents into the database like you normally would.

` js
fs.readFile('readme.md', function (err, value) {
db.put('readme.md', value, function () {
//and so on!
})
})

//run an index batch
indexDb.start()
`

TODO

add realtime update to level-map-merge and get them in level-inverted-index` for free.

https://github.com/dominictarr/level-map-merge/blob/master/index.js#L106-L109

License

MIT