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20个命令行工具监控 Linux 系统性能 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...你要使用它，必须安装一个包名叫 sysstat 的程序包。命令格式常用用法如下：
# vmstat
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu-----
r b swpd free inact active si so bi bo in cs us sy id wa st
1 0 0 810420 ...
File Upload ASP.NET MVC 3.0
...GetExtension(Request.Files[0].FileName).ToLower();
if (extension != ".pdf" && extension != ".doc" && extension != ".docx" && extension != ".rtf" && extension != ".txt")
{
ModelState.AddModelError("uploadError", "Supported file extensions: pdf, doc, do...
Pandoc markdown page break
... to use raw LaTeX \newpage. This works perfectly when outputting LaTeX (or pdf created through LaTeX). However, one will run into problems when targeting different formats like HTML or docx.
A simple solution when targeting other formats is to use a pandoc filter which can transform the internal do...
Specifying and saving a figure with exact size in pixels
...I is not supported by all backends. Here, the PNG backend is used, but the pdf and ps backends will implement the size differently. Also, changing the DPI and sizes will also affect things like fontsize. A larger DPI will keep the same relative sizes of fonts and elements, but if you want smaller fo...
Disabling browser print options (headers, footers, margins) from page?
...from the margins; see What does the mozdisallowselectionprint attribute in PDF.js do?.
Other browsers
Unfortunately, there seems to be no way to resolve this problem in Internet Explorer, so you'll have to resort to PDF or ask users to disable margin texts.
The same goes for Safari; according to a c...
Why does C++11 not support designated initializer lists as C99? [closed]
... standard: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0329r4.pdf
This brings limited support for c99's Designated Initializers. This limitation is described as follows by C.1.7[diff.decl].4, given:
struct A { int x, y; };
struct B { struct A a; };
The following Designated Initializa...
Why can't C++ be parsed with a LR(1) parser?
...biguities".
It goes on to give a number of examples (see page 147 of the pdf).
The example is:
int(x), y, *const z;
meaning
int x;
int y;
int *const z;
Compare to:
int(x), y, new int;
meaning
(int(x)), (y), (new int));
(a comma-separated expression).
The two token sequences have the ...
How to create a density plot in matplotlib?
...her query to ask my data is discrete in nature and I am trying to plot the PDF for that, after reading through scipy doc I understood that PMF = PDF any suggestions on that how to plot it?
– Sitz Blogz
Apr 19 '16 at 19:31
...
正则表达式 30 分钟入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...看，我自己也没能把所有的东西记下来，不是吗？
清除格式 文本格式约定：专业术语 元字符/语法格式 正则表达式 正则表达式中的一部分(用于分析) 对其进行匹配的源字符串 对正则表达式或其中一部分的说明
隐藏边注 本文...
How to sort in-place using the merge sort algorithm?
...result", this paper describes a couple of variants of in-place merge sort (PDF):
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.22.5514&rep=rep1&type=pdf
In-place sorting with fewer moves
Jyrki Katajainen, Tomi A. Pasanen
It is shown that an array of n
elements can be sor...