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C++使用OLE/COM高速读写EXCEL的源码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...app;
///是否已经预加载了某个sheet的数据
BOOL already_preload_;
///Create the SAFEARRAY from the VARIANT ret.
COleSafeArray ole_safe_array_;
LPDISPATCH m_lpDisp;
};
ExcelOp.cpp
#include "StdAfx.h"
#include "ExcelOp.h"
#ifdef _DEBUG
#define new...
PostgreSQL: How to make “case-insensitive” query
...t programmers don't have to remember to lowercase strings. But you need to read the sections "String Comparison Behavior" and "Limitations" in the docs before you decide to use citext.
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impro...
What is the correct way to check for string equality in JavaScript?
...oach.
For insight into this, and other "good vs. bad" parts of Javascript read up on Mr. Douglas Crockford and his work. There's a great Google Tech Talk where he summarizes lots of good info: http://www.youtube.com/watch?v=hQVTIJBZook
Update:
The You Don't Know JS series by Kyle Simpson is ex...
Why is there no logical xor in JavaScript?
... // default to a new Image
or
src = image && image.src; // only read out src if we have an image
But the truth value of this result can also be used to decide if a "real" logical operator would have returned true or false.
This makes it possible to write things like
if (typeof image.h...
django - why is the request.POST object immutable?
...hashable.
So that the POST data can be built lazily (without committing to read the whole response), as claimed here? I see no evidence of this in the code: as far as I can tell, the whole of the response is always read, either directly, or via MultiPartParser for multipart responses.
To protect you...
Haskell: Converting Int to String
I know you can convert a String to an number with read :
3 Answers
3
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builtins.TypeError: must be str, not bytes
...ary file to base64 & vice versa. Prove in python 3.5.2
import base64
read_file = open('/tmp/newgalax.png', 'rb')
data = read_file.read()
b64 = base64.b64encode(data)
print (b64)
# Save file
decode_b64 = base64.b64decode(b64)
out_file = open('/tmp/out_newgalax.png', 'wb')
out_file.write(deco...
How to add reference to System.Web.Optimization for MVC-3-converted-to-4 app
...
Update
Version 1.1.x is available, read the release notes: https://www.nuget.org/packages/Microsoft.AspNet.Web.Optimization
The Microsoft.Web.Optimization package is now obsolete. With ASP.NET (MVC) 4 and higher you should install the Microsoft ASP.NET Web ...
How big can a MySQL database get before performance starts to degrade
... you are going to have to move to a master/slave configuration so that the read queries can run against the slaves and the write queries run against the master. However if you are not ready for this yet, you can always tweak your indexes for the queries you are running to speed up the response time...
Dilemma: when to use Fragments vs Activities:
...d vice versa.
I've created a post about this dillema here, if you wish to read some further.
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