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Execute method on startup in Spring
...w that I can do the trick of setting a method with @Scheduled annotation and it executes just after the startup, but then it will execute periodically.
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Java: How to get input from System.console()
...d delegates to an overloaded read() method that reads 8192 amount of bytes and buffers them until they are needed. It still returns only the single byte (but keeps the others in reserve). This way the BufferedInputStream makes less native calls to the OS to read from the file. Thanks
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Check if a temporary table exists and delete if it exists before creating a temporary table
I am using the following code to check if the temporary table exists and drop the table if it exists before creating again. It works fine as long as I don't change the columns. If I add a column later, it will give an error saying "invalid column". Please let me know what I am doing wrong.
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How to check whether a string contains a substring in JavaScript?
Usually I would expect a String.contains() method, but there doesn't seem to be one.
3 Answers
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fstream默认不支持中文路径和输出整数带逗号的解决办法 - C/C++ - 清泛网 -...
...径中带有中文，则创建一般会失败。如下面代码：view plain#include<iostream>#include<fstream...我们用fstream来创建一个新文件，如果文件路径中带有中文，则创建一般会失败。如下面代码：
#include <iostream>
#include <fstream>
#include <string>
...
C语言判断文件是否存在 - C/C++ - 清泛网 - 专注C/C++及内核技术
...言判断文件是否存在用函数access，头文件是io.h，原型：int access(const char *filename, int amode);amode参数为0时表示检查文件的存在性，如果文件存...用函数access，头文件是io.h，原型：
int access(const char *filename, int amode);
amode参数为0时...
ATL CComPtr和CComQIPtr详解 - C/C++ - 清泛网 - 专注IT技能提升
...值给CComQIPtr的时候，CComQIPtr会自动的调用接口指针的QueryInterface接口，来获得对应的正确的接口指针。CComPtr和CComQIPtr是智能接口指针类，它们在销毁的时候，不需要手动去释放接口指针，在赋值的时候，也不需要手动的AddRef,在...
c++ 写日志通用类，可设置日志级别 - C/C++ - 清泛网 - 专注C/C++及内核技术
c++ 写日志通用类，可设置日志级别c++ 写日志通用类（windows & linux 通用），可设置日志级别。代码经过较长时间的测试，可用性高。Logger.h
#ifndef __LOGGER_H_
#define __LOGGER_H_
#include <iostream>
#include <atlstr.h>
#pragma warning(disable:4996...
C++中判断文件、目录是否存在的几种方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...入流的时候，如果文件不存在则流创建失败。
ifstream fin("hello.txt");
if (!fin)
{
std::cout << "can not open this file" << endl;
这是c++中最常用的方式。
二、File
C中也是同样道理，我们可是File的相关操作。
File* fh = fopen("hello","r");...
shared_ptr指针被赋值后，原指针会引用清零、自动释放。 - C/C++ - 清泛网 ...
...被赋值后，原指针会引用清零、自动释放。std::shared_ptr<int> intg;void foo(std::shared_ptr<int> p){ ...shared_ptr指针被赋值后，原指针会引用清零、自动释放。
std::shared_ptr<int> intg;
void foo(std::shared_ptr<int> p)
{
intg = p; // 原指...