一张图系列

![ts数据类型.png](https://p3-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/29f98aaa352349a68870716da250af28~tpl

![数组常用方法.png](https://p3-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/4b17028184e94ac59b8a0c87137c006b~tpl

![ref.png](https://p3-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/678dfd4aa4be4a0da55355cf0d71682c~tplv-k