isEqual: 首先判断两个对象是否类型一致, 再判断具体内容是否一致,如果类型不同直接return no.如先判断是否都是 NSString,在判断string的内容。 isEqualToString: 直接判断字符串内容,当然你要确保比较的对象保证是字符串。 == 直接比较指向的地址。
if (message) return message; } while (0) extern int tests_run; 说明:第一行断言,当测试条件不满足时,返回错误信息; 第二行运行测试,传入参数为函数指针,函数中无传入参数,当调用一次,全局变量测试次数 tests_run 自加1。当返回的字符串不为空时,则返回 messgage; 第三行外部定义(extern)的运行次数,通...
include(CheckIPOSupported) check_ipo_supported(RESULT ipo_supported) if(ipo_supported) set(CMAKE_INTERPROCEDURAL_OPTIMIZATION True) endif() 正如你所见,我们不得不包含一个内置模块来获取check_ipo_supported()命令的访问权限。 检查支持的编译器功能 如我们之前讨论的,如果我们的构建失败,最好是早点失败,这样...
Message(const std::string &m) : message_(m) {} friend std::ostream &operator<<(std::ostream &os, Message &obj) { return obj.printObject(os); } private: std::string message_; std::ostream &printObject(std::ostream &os); }; std::string getUUID(); 这是Message.cpp中相应的实现: ...
if(<variable|string> PATH_EQUAL <variable|string>) CMake 版本要求:大于等于3.24 如果这个元素在列表中返回True,否则返回False。 关于路径的比较其实就是另个字符串的比较,如果路径格式书写没有问题也可以通过下面这种方式进行比较[STREQUAL]: if(<variable|string>STREQUAL<variable|string>) ...
String^ message = gcnew String("Test String to Marshal");constchar* result; result = marshal_as<constchar*>( message );return0; } 範例:使用者定義已被取代的函式 當您不再建議使用特定函式時,您可以在自己的程式碼中使用deprecated屬性來警告呼叫者。 在此範例中,C4996 會在兩個位置產生:一個在宣...
fputs() — Write a string fputwc() — Output a wide-character fputws() — Output a wide-character string fread() — Read items __freadable() — Determine if a stream is open for reading __freadahead() — Retrieve number of bytes remaining in input buffer __freading() — Det...
The public key must be a hexadecimal character string in the public key encoding format, and generated by the client software that supports SSH. For detailed operations, see the SSH client software help. You must enter the RSA, DSA, or ECC public key on the device that works as the SSH ...
To improve security, the connection string is now stored encrypted and is decrypted only as needed; it can't be returned as plain text. The string can be obtained by using the CDatabase::Dump method. Signature of CWnd::OnPowerBroadcast is changed. The signature of this message handler is ...
Method method = methodList[i];NSString*methodName = [NSStringstringWithCString:sel_getName(method_getName(method)) encoding:NSUTF8StringEncoding];if([@"printName"isEqualToString:methodName]) { lastImp = method_getImplementation(method);