我个人觉得这个缓冲区类的实现值得参考和借鉴,以前自己写的只支持一次性全部读出和写入,而这个Buffer类可以读一点,写一点,内部逻辑稳定。这个Buffer类是vector(方便动态扩容),对外表现出std::queue的特性,它的内部原理大概就是下图这样子的,用两个游标(readerIndex_和writerIndex_)标记可读缓冲区的起始位置和空闲空间的...
When you need to pass binary safe strings in a command, the %b specifier can be used. Together with a pointer to the string, it requires a size_t length argument of the string: reply = redisCommand(context, "SET foo %b", value, (size_t) valuelen); Internally, Hiredis splits the...
command.append((char) ch);//将数据添加到stringbuffer中 expected--; }//Close the socket now that we are done with ittry{ socket.close(); }catch(IOException e) { ; }//Match against our command stringbooleanmatch =command.toString().equals(shutdown);//判断是否关闭应用if(match) {break; ...
“第三,String 类实现了 Comparable 接口,意味着最好不要用‘==’来比较两个字符串是否相等,而应该用compareTo()方法去比较。” “第四,StringBuffer、StringBuilder 和 String 一样,都实现了 CharSequence 接口,所以它们仨属于近亲。由于 String 是不可变的,所以遇到字符串拼接的时候就可以考虑一下 String 的另外...
#include<string> #include<sqlite3.h> using namespace std; int main() { sqlite3 *db; sqlite3_stmt *stat; char *zErrMsg = 0; char buffer2[1024]="0"; sqlite3_open("./MetaInfo.db", &db); int result; if(result) { cout<<"Open the database sqlite.db failed"<<endl; ...
When this option is set to 1, iCM will add the preview string to Vim's completeopt option (see :h completeopt). If your completeopt option already has preview set, there will be no effect. You can see the current state of your completeopt setting with :set completeopt? (yes, the ...
而StringBuilder是StringBuffer的异步版本,如果不需要同步的话,应优先选择StringBuilder StringBuilde和StringBuffer拥有类似的构造函数和方法,这里只介绍StringBuilder用法 StringBuilder拥有四个构造方法 public StringBuilder() public StringBuilder(CharSequence seq) public StringBuilder(int capacity) public StringBui...
146//atoi函数原型是: int atoi( const char *string ); 147//The return value is 0 if the input cannot be converted to an integer ! 148// 149if(argc>2) 150{ 151times=atoi(argv[2]); 152if(times==0) 153times=DEF_PACKET_NUMBER; ...
string-length "^4.0.1" terminal-link "^2.0.0" v8-to-istanbul "^4.1.3" optionalDependencies: node-notifier "^7.0.0" "@jest/source-map@^26.1.0": version "26.1.0" resolved "https://registry.npmjs.org/@jest/source-map/-/source-map-26.1.0.tgz#a6a020d00e7d9478f4b690167c5...
2、String是最基本的数据类型吗? 基本数据类型包括byte、int、char、long、float、double、boolean和short。 java.lang.String类是final类型的,因此不可以继承这个类、不能修改这个类。为了提高效率节省空间,我们应该用StringBuffer类 3、int和Integer有什么区别 ...