Method execute

lib/index.js:4913–4929

(db, callback)

  }

  execute(db, callback) {
    var keys = new Set();
    var uniqBatches = [];

    // remove duplicates; last one wins
    for (var i = this._batch.length - 1; i >= 0; i--) {
      var operation = this._batch[i];
      var lookupKey = operation.prefix.prefix()[0] + '\xff' + operation.key;
      if (keys.has(lookupKey)) {
        continue;
      }
      keys.add(lookupKey);
      uniqBatches.push(operation);
    }

    db.batch(uniqBatches, callback);
  }
}

var DOC_STORE = 'document-store';