大约有 40,000 项符合查询结果（耗时：0.0543秒） [XML]
Python assigning multiple variables to same value? list behavior
...
If you're coming to Python from a language in the C/Java/etc. family, it may help you to stop thinking about a as a "variable", and start thinking of it as a "name".
a, b, and c aren't different variables with equal values; they're different names for the same identical value. Var...
How do I use raw_input in Python 3
...e no global functions. Start out with some hindsight from other languages. Etc. Removing functions is not off the table either.
– dlamblin
Sep 25 '17 at 7:17
...
how to detect search engine bots with php?
...n set the user-agent to what they want, looking for 'Googlebot', 'bingbot' etc is only half the job.
The 2nd part is verifying the client's IP. In the old days this required maintaining IP lists. All the lists you find online are outdated. The top search engines officially support verification thro...
Interfaces — What's the point?
...deep dish ingredients in system
break;
//.... etc.
}
}
}
However, deep dish pizzas (in C# terms) may require different properties to be set in the Prepare() method than stuffed crust, and thus you end up with a lot of optional properties, and the class does...
How to initialize a private static const map in C++?
...
map<int,int> create_map() {
map<int, int> m;
m[1] = 2; // etc.
return m;
}
}
map<int, int> const A::m = create_map();
share
|
improve this answer
|
...
How do I provide JVM arguments to VisualVM?
...
Should be able to modify the memory settings in %JDK_HOME%\lib\visualvm\etc\visualvm.conf
Xms and Xmx are in the default_options line.
share
|
improve this answer
|
follo...
Mailto links do nothing in Chrome but work in Firefox?
...t will run thunderbird; if they have outlook installed it may run outlook, etc. Personally, it did not run gmail by default, I had to set it up that way.
– kennypu
Jul 14 '13 at 1:55
...
Python exit commands - why so many and when should each be used?
...xits the program without calling cleanup handlers, flushing stdio buffers, etc. Thus, it is not a standard way to exit and should only be used in special cases. The most common of these is in the child process(es) created by os.fork.
Note that, of the four methods given, only this one is unique i...
nvarchar和varchar相互转换、联合查询 - ORACLE - 清泛IT论坛，有思想、有深度
...后由 zqp2013 于 2015-2-27 16:42 编辑
场景：联合查询（union all）Oracle两张表，同一组字段的数据类型不一致，分别是nvarchar和varchar。
这时联合查询报错如下：ora12704：字符集不匹配。
解决方法：需要对数据类型进行转换。
Specif...
How do I get a list of column names from a psycopg2 cursor?
...
ps_cursor.execute('select 1 as col_a, 2 as col_b')
my_record = ps_cursor.fetchone()
print (my_record['col_a'],my_record['col_b'])
>> 1, 2
share
|
improve this answer
|
...