() {}Public Static Single getinstance () {/// lock is who? Byte-code file object; if (s = = null) { synchronized (single.class) {if (s = = null)s = new single ();}}return s;}}---------------------------------------------------------Synchronous Deadlocks : You can usually see the phenomenon as long as the synchronization is nested. There is a synchronous code block in the synchronization function, and a synchronization function in the synchronization code block.inter-thread communication : Idea
2. Bind columns [visible, read-only, frozen]
After a column is frozen,. Frozen = true. Columns starting from the column to the left will be affected.For example, in column a B c d e, the frozen attribute set for column E to frozen = true a B c d is automatically set to tr
only the determination of material and the price after negotiation, while the actual delivery plan is then determined, if the corresponding VMI supply-side Library management model, the possible way may also be the establishment of a blanket purchase agreement, and the material set up a corresponding supplier list. Replenishment of the escrow materials, according to replenishment notification, in the ERP system to establish a standard purchase order.Purchase order order related control rules (t
Comparison between Linux and Android sleep (1)
Introduction to Linux sleep (suspend)
In Linux (PC and embedded systems), sleep mainly consists of three main steps:
1. Freeze user-mode access and kernel-mode tasks;
2. Call the registered device and suspend callback functions in the registration order;
3. Sleep the core device and sleep the CPU into a sleep frozen process. The kernel sets the state of all processes in the process list to stop and saves
implement a function similar to Windows, the 2.6 kernel is hibernate. (The Windows Shutdown option contains "shutdown ", "restart", "logout", "Stand by", and "hibernate "). In the kernel compilation menu, there is a software suspend option in the power managerment options, that is, config_software_suspend in the kernel compilation option, and it is selected so that the machine can be suspended ). Obviously, we don't need to care about it. However, the reason for setting this flag is that suspen
After py2exe is compiled, how to obtain the absolute path of the EXE
#! Usr/bin/python
Solutions on the official website
Http://www.py2exe.org/index.cgi/WhereAmI
You want to know where your. EXE is
Why? Maybe, you are building a website and have a subdir. /static below the directory in which your. EXE resides, from where you server all. CSS and. JS that is static. or, you put the logs right below the programs dir. /log
See alsoHowtodetermineifrunningfromexeFor a shorter recipe
The above link
the "+" operator to use the +,* operation to multiply the width and height of a box by a scalar, here is the definition and mathematical operator of a version box class:
Copy Code code as follows:
Class Box
def initialize (w,h) # Initialize the width and height
@width, @height = W, h
End
def + (Other) # Define + to do vector additionBox.new (@width + other.width, @height + other.height)End
def-@ # Define unary minus to negate width and heightBox.new (-@width,-@heig
Excel, which implements the ability to lock the rows and columns of a table. When we are making an Excel table, if the number of columns, the number of rows is also more, once the scroll down, then the top of the header row followed by scrolling, in the processing of data often difficult to distinguish between the column data corresponding to the title, in fact, the use of the "Frozen pane" function can be a good solution to this problem. Locate the c
To split a worksheet into a window, you can divide the data from the the split window is frozen again, we have a great help in reference to the data, when we drag the scroll bar to view, the frozen part of the change will be frozen, no matter how you drag the frozen part is not changed, It has played a great role both
adjustment can bring great benefits.
Automatic Caching
Mknetworkkit can automatically cache all of your get requests. When you initiate the same request again, Mknetworkkit can then invoke the response cache (if available) and pass it to handler for processing. Of course, it also makes a request to the server. Once the server data is obtained, handler is again required to process the newly acquired data. In other words, you do not have to manually cache. You only need to use:
Copy Code
single server. In order to avoid interruption of service caused by software hardware failure, Updateserver records commit log and typically uses two-machine hot standby
Mergeserver
Servers that perform static dynamic data consolidation often share a physical server with Chunkserver. Mergeserver enables users to access complete and up-to-date data
Rootserver
Configure the server, typically a single server. To avoid interruption of service caused by software hardware failure, Rootserver records c
, even if we are frozen4 using Py2exe5 """6 7 Try: One_ = sys.executableifWearefrozen ()Else __file__ A exceptNameerror: -_ =inspect.getsourcefile (Modulepath) - the returnGetunicode (Os.path.dirname (Os.path.realpath (_)), -Encoding=sys.getfilesystemencoding ()orunicode_encoding) _ = sys.executable If Wearefrozen () else __file__ This sentence logically parses, ' _ ' this variable, If Wearefrozen () ==true, then it is equal to sys.executable,sys.executable point in v
Nbsp; it was very exciting when Sony first announced that PlayStation3 would be able to run Linux directly. Initially, it was difficult to install Linux directly. The user-defined script of the installation programs supported by the PS3 is used to manually convert the FedoraCore5 or 6 installation DVDs into a system running with a special PS3 kernel. Person
It was exciting when Sony first announced that PlayStation 3 would be able to run Linux directl
, Linux, Windows 8 Metro, Windows 10 and many other platforms. Support for PlayStation Mobile, Raspberry Pi, and PlayStation 4 is currently being perfected. With regard to graphics systems, Monogame allows developers to choose between OpenGL-based or DirectX. You can find out more about Monogame's history at Monogame's website.Two years ago I was going to simulate a game like the bucket, when I was using Mi
If someone else writes a function in the thinkphp project, I wonder why this function serves.
function is_mobile() { $user_agent = $_SERVER['HTTP_USER_AGENT']; $mobile_agents = Array("240x320","acer","acoon","acs-","abacho","ahong","airness","alcatel","amoi","android","applewebkit/525","applewebkit/532","asus","audio","au-mic","avantogo","becker","benq","bilbo","bird","blackberry","blazer","bleu","cdm-","compal","coolpad","danger","dbtel","dopod","elaine","eric","etouch","fly ","
certain amount of 3D drawing processing power. In order to overcome the high cost of dual-display design, Virtual Boy uses a unique red LED array scanning imaging, the left and right eye respectively configured 384 horizontally arranged red LED array, through 50 times per second of the mirror and each swing 224 times the red LED array, to constitute 384 x224 4-segment red-and-black stage images updated 50 times per second.Although Virtual Boy provides a genuine 3D stereoscopic display, but beca
thereafter the notoriety of each era (only one by one of the works that have made a benign evaluation of the PlayStation platform on the " Legend of the Savior of the century).But then, as if carrying a curse in general, "Beidou" in the field of game adaptation GUI The success of a long time, but also because of the failure of continued to lose the original dazzling light.Feedback HellWant to operate the cloud of freedom in the true and Beidou? Here
I recommend that you make every effort to reach a consistent rate of 60fps. that corresponds to the maximum refresh rate of most LCD displays and is also the speed used on popular gaming platforms such as Sony's PlayStation and Playstation
Portable (PSP ).
A High Frame Rate is challenging, because at 60fps you have only 1/60th of a second (16.67 milliseconds) between CILS toondrawframe () to do everythi
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.