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How can I avoid Java code in JSP files, using JSP 2?
... products = productService.list(); // Obtain all products.
request.setAttribute("products", products); // Store products in request scope.
request.getRequestDispatcher("/WEB-INF/products.jsp").forward(request, response); // Forward to JSP page to display them in a HTML table.
} c...
Rotating x axis labels in R for barplot
... do a little tweaking up and down. Here's an example with the mtcars data set:
x <- barplot(table(mtcars$cyl), xaxt="n")
labs <- paste(names(table(mtcars$cyl)), "cylinders")
text(cex=1, x=x-.25, y=-1.25, labs, xpd=TRUE, srt=45)
...
Replacing NULL with 0 in a SQL server query
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A Simple way is
UPDATE tbl_name SET fild_name = value WHERE fild_name IS NULL
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What makes Lisp macros so special?
...divisibility by two
if (= (mod x 2) 0)
;; append to the list
do (setq divisibleByTwo (append divisibleByTwo (list x))))
Before I go further, I should better explain what a macro is. It is a transformation performed on code by code. That is, a piece of code, read by the interpreter (o...
How do I center a window onscreen in C#?
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Best answer for the situation. I did not want to set the position but to have it reset once I came back to the form. This is perfect.
– KangarooRIOT
Apr 25 '17 at 0:29
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How can I read command line parameters from an R script?
...roducible example.
I made two files: exmpl.bat and exmpl.R.
exmpl.bat:
set R_Script="C:\Program Files\R-3.0.2\bin\RScript.exe"
%R_Script% exmpl.R 2010-01-28 example 100 > exmpl.batch 2>&1
Alternatively, using Rterm.exe:
set R_TERM="C:\Program Files\R-3.0.2\bin\i386\Rterm.exe"
%R_TER...
Where does System.Diagnostics.Debug.Write output appear?
.... Also note that Debug.Write will only function if the DEBUG build flag is set, while Trace.Write will only function if the TRACE build flag is set.
Setting the DEBUG and/or TRACE flags is easily done in the project properties in Visual Studio or by supplying the following arguments to csc.exe
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Is volatile expensive?
... with added native functions providing additional functionality like getAndSet, compareAndSet etc., so from a performance point of view using it is just useful if you need the added functionality. But I wonder why you refer to the OS here? The functionality is implemented in CPU opcodes directly. An...
OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
...西，主要步骤如下：
//设置一堆给libeasy的回调函数
memset(&handler_, 0, sizeof(easy_io_handler_pt));
//以下都是对于OceanBase 0.4 mergeserver的obmysql端口来说的
// 将mergeserver需要回复给mysql客户端的结果以easy_buf_t(libeasy用来管理输入输出...
Why does Google +1 record my mouse movements? [closed]
...ript loaded first, you could hook addEventListener and log everyone who is setting addEventListener and see who's doing it and then, by looking at the relevant code, see what they're doing.
Put this in place before the Google code loads:
var oldListener = document.addEventListener;
document.addEve...