大约有 46,000 项符合查询结果（耗时：0.0552秒） [XML]
浮点数在内存中的表示 - C/C++ - 清泛网 - 专注C/C++及内核技术
浮点数在内存中的表示Float_Memory_Representation一般我们常见的字符型、整型在内存中采用标准的二进制存储，但是程序员往往容易忽略浮点数在内存中的储存方式，从而会导致一些误用，最常见的是浮点数等于零的判断。只有理解...
OpenSuSE 安装bpftrace - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...
zypper install bcc-devel
#zypper install bcc-devel-0.22.0-lp151.127.1.x86_64 #安装失败的话，可以尝试
3、安装bpftrace（参考：INSTALL.md）：
OCICLI https://software.opensuse.org/ymp/home:pavlix:Kernel/openSUSE_Leap_15.1/bpftrace.ymp
4、验证：
bpftrace
USAGE:
...
how to rotate a bitmap 90 degrees
There is a statement in android canvas.drawBitmap(visiblePage, 0, 0, paint);
10 Answers
...
Can I “multiply” a string (in C#)?
...
And it's not much more in .NET 3.5: String.Concat(Enumerable.Repeat("Hello", 4).ToArray())
– Mark Foreman
Sep 3 '12 at 0:54
...
event Action vs event EventHandler
...ther event in the system, which I would consider a drawback.
One upside with the dominating design pattern (apart from the power of sameness) is that you can extend the EventArgs object with new properties without altering the signature of the event. This would still be possible if you used Action...
Creating a jQuery object from a big HTML-string
...t does not exist in the DOM
$('<div/>').html(string) appends string within that fake <div> as children
.contents() retrieves the children of that fake <div> as a jQuery object
If you want to make .find() work then try this:
var string = '<div><input type="text" value="val...
How to find all serial devices (ttyS, ttyUSB, ..) on Linux without opening them?
...
This is a function of udev (specifically its configuration in /lib/udev/rules.d/??-persistent-serial.rules), which was introduced in 2.5.
– ergosys
Aug 14 '13 at 4:16
...
$PHP_AUTOCONF errors on mac os x 10.7.3 when trying to install pecl extensions
I am trying to setup my machine with pecl_http and memcache and in both cases, I get similar errors. This is on MAC OS X 10.7.3 (lion) and I also have XCODE installed on it. I also installed Zend Server community edition before running these commands and have CFLAGS='-arch i386 -arch x86_64' environ...
JQuery: 'Uncaught TypeError: Illegal invocation' at ajax request - several elements
...must be updated accordingly. Each element in A implies many elements in B, it's a one-to-many relationship (A contains nations, B should contain cities located in the given nation).
...
What is the difference between precision and scale?
...
Precision is the number of significant digits. Oracle guarantees the portability of numbers with precision ranging from 1 to 38.
Scale is the number of digits to the right (positive) or left (negative) of the decimal
point. The scale can range from -84 to 127.
In...