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c++提取复数的实部和虚部 - C/C++ - 清泛网 - 专注C/C++及内核技术
...arse(COMPLEX * cp, const char * strCplx, const int len)
{
memset(cp, 0, sizeof(COMPLEX));
char buf[MAX_BUF_LEN];
int signPos = -1, // +/-号位置
iPos = -1; // 结尾的i的位置
for (int i = len-1; i >-1; i--)
{
if ('i' == strCplx[i])
...
路径 /storage/emulated/0/... 在哪儿？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
路径 /storage/emulated/0/... 在哪儿？有时Android下载文件提示保存在 storage emulated 0 ...目录下，但是在文件管理器中根本找不到这个目录，那么这个目录到底在何方呢？有时Android下载文件提示保存在/storage/emulated/0/...目录下，但是在...
How to install latest (untagged) state of a repo using bower?
...
220
Specify a git commit SHA instead of a version:
bower install '<git-url>#<git-commit-sh...
How do I verify jQuery AJAX events with Jasmine?
...yOn($, "ajax");
getProduct(123);
expect($.ajax.mostRecentCall.args[0]["url"]).toEqual("/products/123");
});
function getProduct(id) {
$.ajax({
type: "GET",
url: "/products/" + id,
contentType: "application/json; charset=utf-8",
dataType: "json"
});
}
...
Remove data.frame row names when using xtable
...
% latex table generated in R 2.12.2 by xtable 1.5-6 package
% Fri Mar 25 10:06:08 2011
\begin{table}[ht]
\begin{center}
\begin{tabular}{rrrrr}
\hline
am & cyl & mpg & hp & wt \\
\hline
0.00 & 4.00 & 22.90 & 84.67 & 2.94 \\
0.00 & 6.00 & 19.12 & 11...
How to throw a C++ exception
...
#include <stdexcept>
int compare( int a, int b ) {
if ( a < 0 || b < 0 ) {
throw std::invalid_argument( "received negative value" );
}
}
The Standard Library comes with a nice collection of built-in exception objects you can throw. Keep in mind that you should always...
WPF Command Line
...
answered Jan 8 '09 at 23:13
Matt HamiltonMatt Hamilton
183k5959 gold badges376376 silver badges317317 bronze badges
...
rotating axis labels in R
...re's an example:
require(grDevices)
tN <- table(Ni <- stats::rpois(100, lambda=5))
r <- barplot(tN, col=rainbow(20), las=1)
That represents the style of axis labels. (0=parallel, 1=all horizontal, 2=all perpendicular to axis, 3=all vertical)
...
Python try…except comma vs 'as' in except
...
The definitive document is PEP-3110: Catching Exceptions
Summary:
In Python 3.x, using as is required to assign an exception to a variable.
In Python 2.6+, use the as syntax, since it is far less ambiguous and forward compatible with Python 3.x.
In Python ...