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async.js
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async.js
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var leveldb = require('../build/default/leveldb.node'),
DB = leveldb.DB,
Iterator = leveldb.Iterator,
WriteBatch = leveldb.WriteBatch;
var path = __dirname + "/testdb";
var db = new DB();
// Opening
console.log("Opening...");
db.open(path, {create_if_missing: true, paranoid_checks: true}, function(err) {
if (err) throw err;
console.log("ok");
// Putting
console.log("\nPutting...");
var key = "Hello";
var value = "World";
db.put(key, value, function(err) {
if (err) throw err;
console.log("ok");
// Getting
console.log("\nGetting...");
db.get(key, function(err, val) {
if (err) throw err;
if (val != value) throw "Expected: " + value + ", got: " + val;
console.log("ok");
// Deleting
console.log("\nDeleting...");
db.del(key, function(err) {
if (err) throw err;
console.log("ok");
// Closing
console.log("\nClosing...")
db.close(function(err) {
if (err) throw err;
console.log('ok');
});
});
});
});
});