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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
...e/archive/2011/09/25/2190485.html
http://blog.sina.com.cn/s/blog_6e51df7f01015cci.html
感谢原作者的无私奉献。
通过VC实现对Excel表格的操作的方法有多种，如：通过ODBC数据库实现，通过解析Excel表格文件，通过OLE/COM的实现。本文主要研究通过O...
Extract date (yyyy/mm/dd) from a timestamp in PostgreSQL
... by suffixing it with ::date. Here, in psql, is a timestamp:
# select '2010-01-01 12:00:00'::timestamp;
timestamp
---------------------
2010-01-01 12:00:00
Now we'll cast it to a date:
wconrad=# select '2010-01-01 12:00:00'::timestamp::date;
date
------------
2010-01-01
...
Which $_SERVER variables are safe?
...|
edited May 23 '17 at 12:10
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How disable Copy, Cut, Select, Select All in UITextView
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108
The easiest way to disable pasteboard operations is to create a subclass of UITextView that ov...
Installing Python packages from local file system folder to virtualenv with pip
...
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Explicitly calling return in a function or not
...(x) return(vector(length=x,mode="numeric")))(x)
,repeats)) }
maxlen <- 1000
reps <- 10000
along <- seq(from=1,to=maxlen,by=5)
ret <- sapply(along,FUN=bench_ret2,repeats=reps)
nor <- sapply(along,FUN=bench_nor2,repeats=reps)
res <- data.frame(N=along,ELAPSED_RET=ret["elapsed",],ELA...
Managing constructors with many parameters in Java
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Of course with static imports you never even have to "see" these "builders" at all. For example, you could have static methods name(String ...
How to concatenate properties from multiple JavaScript objects
...
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How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
...ou need the equivalent trick with the stringizing operator too.
Section 6.10.3 of the C99 standard covers 'macro replacement', and 6.10.3.1 covers 'argument substitution'.
After the arguments for the invocation of a function-like macro have been identified,
argument substitution takes place. ...
Why would you use an ivar?
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100
Encapsulation
If the ivar is private, the other parts of the program can't get at it as easily...