文章目录 1. Install JDK on mac2. zshenv, zshrc, zprofile3. 查看java环境变量配置 1. Install JDK on mac
Installation of the JDK on macOS
2. zshenv, zshrc, zprofile
How Do Zsh Configuration Files Work?
3. 查看java环境变量配置
open Terminal,cd…
错误: Type of the parameter must be a class annotated with Entity or a collection/array of it. kotlin.coroutines.Continuation<? super kotlin.Unit> $completion); 首先大家检查一下几个点
一、kotlin-kapt 二、 是否引入了 room-ktx
我是2024年…
代码也没有逻辑错误,但是报错
[Vue warn]: $listeners is readonly. $attrs is readonly. 情况1:多处声明了new Vue,解决方案:删除一个,用全局变量引用同一个Vue 情况2:import Vue from Vue;第二个Vue首字…
#include <iostream>
using namespace std;class A
{
public:int a;A(int a):a(a){cout<<"A的有参构造"<<endl;}
};
class B:virtual public A
{
public:int b;B(int a,int b):A(a),b(b){cout<<"B的有参构造"<<endl;}
};
cl…
查询表是否存在
使用 SHOW TABLES
SHOW TABLES LIKE %tbl_tabl%;结果: 查询 INFORMATION_SCHEMA
// like 匹配
SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES where TABLE_SCHEMA test AND TABLE_NAME like %tbl%;
// 完全匹配
SELECT TABLE_NAME FROM INFORMATION_SC…