Paul Cantrell@paulhimes It’s basically “Swift optionals!”
The big insight from that section is that the thing optionals get right that null gets wrong is that null violates LSP:
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.