Awesome
LevelUP Async Iterator
<img alt="LevelDB Logo" height="100" src="http://leveldb.org/img/logo.svg">adds iterator()
to levelup
that returns this._db.iterator(options)
plus an injected [Symbol.asyncIterator]
property
Usage
this package requires that the host system support async-iteration. Currently for node 8.x, this requires running your application with:
node --harmony_async_iteration example.js
import/require levelup-async-iterator
on app entry;
import 'levelup-async-iterator';
import * as levelup from 'levelup';
import * as leveldown from 'leveldown';
import * as encode from 'encoding-down';
let db = levelup(encode(leveldown('./db')));
async function main() {
await db.put("a", "John");
await db.put("b", "James");
await db.put("c", "Janet");
await db.put("d", "Joseph");
let iter = db.iterator();
for await (let [key, value] of iter) {
if(key === "a"){
iter.it.seek("c");
}
console.log(key, value);
}
}
main();
output:
D:\Code\levelup-async-iterator>ts-node example
a John
c Janet
d Joseph
<a name="open"></a>
iterator([options])
<code>db.iterator()</code> creates a iterator from the underlying store. the <code>options</code> parameter is the same as what you'd use for createReadStream