Compiler Warnings 编译器警告
Oracle 10g allows you to enable compile-time warnings that are useful to identify potential run-time problems in your programs. These warnings are not serious enough to rais...
分类:
数据库 时间:
2015-06-06 23:35:07
阅读次数:
179
# The ServerName
directive sets the request scheme, hostname and port that
# the server
uses to identify itself. This is used when creating
# redirection
URLs. In the context o...
分类:
Web程序 时间:
2015-06-01 09:42:25
阅读次数:
147
I guess the punch line of this one is Sieving for primes.#include #include #include #include #include #include #include #include using namespace std;v...
分类:
其他好文 时间:
2015-05-28 02:01:14
阅读次数:
414
Link: https://www.hackerrank.com/challenges/identify-smith-numbers 1 def sum_digits(n): 2 return sum(int(x) for x in str(n)) 3 4 def prime_facto...
分类:
其他好文 时间:
2015-05-17 10:44:42
阅读次数:
112
一:英文原文:In iOS 7 and later, if you ask for the MAC address of an iOS device, the system returns the value 02:00:00:00:00:00. If you need to identify th...
分类:
移动开发 时间:
2015-05-12 20:48:57
阅读次数:
170
In this tutorial we will see about debugging java applications using Eclipse. Debugging helps us to identify and fix defects in the application. We wi...
分类:
编程语言 时间:
2015-05-02 11:04:32
阅读次数:
270
Repeated DNA Sequences
All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is sometimes useful to identify repeated s...
分类:
其他好文 时间:
2015-04-10 15:35:15
阅读次数:
242
什么是RTTI
RTTI(Run Time Type Identify)运行时类型检查。就是在运行时知道对象的类型。
实现RTTI的方式
(1)typeid函数
typeid(obj).name()返回对象的类型名称。
(2)dynamic_cast操作符
dynamic_cast可以知道是否可以安全地将对象的地址赋给特定类型的指针。如果转换失败,返回空指针(nullptr)。
注意:
RTTI只适用于包含虚函数的类。
RTTI实现原理就是根据对象所指向的虚函数表知道对象的类型。
在包含虚函数...
分类:
编程语言 时间:
2015-03-30 09:40:15
阅读次数:
161
【题目】
All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is sometimes useful to identify repeated sequences within the D...
分类:
其他好文 时间:
2015-03-20 12:56:36
阅读次数:
149
如果误删除了一个表空间中test的数据文件test.dbf,然后下次重新启动数据库的时候发数据库不能打开了(open),老是报错:SQL>alterdatabaseopen;alterdatabaseopen*ERRORatline1:ORA-01157:cannotidentify/lockdatafile6-seeDBWRtracefileORA-01110:datafile6:‘/u01/app/or..
分类:
数据库 时间:
2015-03-18 18:20:46
阅读次数:
162