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How is mime type of an uploaded file determined by browser?
...st to catch types that we can
// deduce but that we also want to allow the OS to override.
The hard-coded lists come a bit earlier in the file: https://cs.chromium.org/chromium/src/net/base/mime_util.cc?l=170 (kPrimaryMappings and kSecondaryMappings).
An example: when uploading a CSV file from a Wi...
How Can I Browse/View The Values Stored in Redis [closed]
...source desktop tools, also take a look on Redis Desktop Manager.
It's a cross-platform open source Redis DB management tool (i.e. Admin GUI)
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App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 · App Inventor 2 中文网
...硬件提供的文档或厂商提供的java源码，一般会有提供。
一个硬件UUID示例如下：
UUID分为标准UUID和厂商自定义UUID
标准UUID：由SIG发布，采用UUID基数 + 16位UUID的形式，如心率服务的UUID是0x180D，使用的UUID基数是：00000000-0000-10...
Linq to Sql: Multiple left outer joins
...in example
var results =
from expense in expenseDataContext.ExpenseDtos
where expense.Id == expenseId //some expense id that was passed in
from category
// left join on categories table if exists
in expenseDataContext.CategoryDtos
.Where(c => c.Id =...
bundler vs RVM vs gems vs RubyGems vs gemsets vs system ruby [closed]
...f Ruby (it is itself packaged as a gem), but it a "de facto standard" for most applications (you will not find many people not using it, and no good reasons not to use it, actually).
RVM is a tool allowing you to install multiple versions of Ruby on a machine, switching between them when needed. Th...
How to read a file without newlines?
... only works if the file ends with a newline, otherwise the last line will lose a character.
This assumption is true in most cases (especially for files created by text editors, which often do add an ending newline anyway).
If you want to avoid this you can add a newline at the end of file:
with o...
如何查看Oracle用户的SQL执行历史记录？ - 数据库(内核) - 清泛网 - 专注C/...
...然这条语句很普通 但是需要的时候很管用 能够及时查出一个人执行sql语句情况
-------oracle 查看已经执行过的sql 这些是存在共享池中的 --------->
select * from v$sqlarea t order by t.LAST_ACTIVE_TIME desc
-----------查看oracle会话----------------...
How do I convert a double into a string in C++?
...
The boost (tm) way:
std::string str = boost::lexical_cast<std::string>(dbl);
The Standard C++ way:
std::ostringstream strs;
strs << dbl;
std::string str = strs.str();
Note: Don't forget #include <sstream>
...
Is MonoTouch now banned on the iPhone? [closed]
A recent post by John Gruber notes that the following legalese:
18 Answers
18
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Is file append atomic in UNIX?
... granted when we append to a file in UNIX from multiple processes? Is it possible to lose data (one process overwriting the other's changes)? Is it possible for data to get mangled? (For example, each process is appending one line per append to a log file, is it possible that two lines get mangle...