LevelUpIntKey

var levelup = require('level')

var options = {
    keyEncoding: 'binary'
}

//var key = 'name'
var key = 100

// 1) Create our database, supply location and options.
//    This will create or open the underlying LevelDB store.
levelup('./mydb', options, function(err, db) {
    if (err) throw err

    // 2) put a key & value
    db.put(key, 'LevelUP', function (err) {
        if (err) return console.log('Ooops on put!', err.message) // some kind of I/O error

        // 3) fetch by key
        db.get(key, function (err, value) {
            if (err) return console.log('Ooops on get!', err.message) // likely the key was not found

            // ta da!
            console.log(key + ' = ' + value)
        })
    })
})