Awesome
level-probe
Get the first result in a range, using an iterator or stream.
example
const probe = require('level-probe')
const disk = require('test-level')({ clean: true })
const db = disk()
db.batch([
{ key: 'a', value: 'value a' },
{ key: 'b', value: 'value b' },
{ key: 'c', value: 'value c' }
], function(err) {
probe(db, { gte: 'b' }, function(err, kv){
console.log(kv)
})
probe.value(db, { lt: 'x', reverse: true }, function(err, val){
console.log(val)
})
probe(db, { gt: 'd', lt: 'x' }, function(err){
console.log(err.message)
console.log(err.notFound)
})
})
Output:
{ key: 'b', value: 'value b' }
value c
No result in range { gt: "d", lt: "x" }
true
probe(db, [opts], callback)
- If
opts.iterate
isfalse
,level-probe
will use a stream. Iftrue
, it will use an iterator or throw if iterators are not available. If not specified, it will prefer iterators and fall back to streams. - Other options are passed to level-iterator or
db.createReadStream()
probe.key(db, [opts], callback)
Shortcut to probe(db, { values: false }, callback)
.
probe.value(db, [opts], callback)
Shortcut to probe(db, { keys: false }, callback)
.
install
With npm do:
npm install level-probe
license
MIT © Vincent Weevers