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...
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; ...
If the datatype of the column contains any of the strings "CHAR", "CLOB", or "TEXT" then that column has TEXT affinity. Notice that the type VARCHAR contains the string "CHAR" and is thus assigned TEXT affinity. If the datatype for a column contains the string "BLOB" or if no data...
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...
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 ...
redisReply *r, *parent; char *buf; r = createReplyObject(task->type); if (r == NULL) return NULL; assert(task->type == REDIS_REPLY_ERROR || task->type == REDIS_REPLY_STATUS || task->type == REDIS_REPLY_STRING || task->type == REDIS_REPLY_VERB || ...
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; ...
“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...
* TRUE if the given string is a UUID, FALSE otherwise **/ BOOL is_uuid_string(constchar*uuid); /** * Generates a new UUID. The UUID is a time-based time 1 UUID. * A random per-process node identifier is used to avoid keeping global ...
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 ...