I haven't updated my blog for a long time. It's time to sort out some of the most recent projects and learn about Python. As the title shows, today it's time to talk about Windows multi-process plus co-concurrent mode. In fact, on the internet is quite a lot of Linux under the multi-process and co-concurrent mode, the Linux itself support for Python is better. But because my development environment is windows, and the information on the Internet is st
Explain the next headline, where I get the data through webservice and load it dynamically into the TreeView node. Then it is not a child node until a node is expanded. Then it does not display the plus sign. This causes the user to mistakenly assume that the node cannot be expanded. I do this, each time you create a node A, the default is that it creates a child node B (just give a name, if it is "hehe"), then the creation of Node A will have child n
1090 plus two fork tree2003 NOIP National League Improvement Grouptime limit: 1 sspace limit: 128000 KBtitle level: Diamonds Diamond SolvingTitle DescriptionDescriptionThe mid-order traversal of a two-ary tree with an n node is (l,2,3,..., N), where the number,..., n is a node number. Each node has a fraction (all positive integers), the score for the J node is di,tree and each of its subtrees has an extra point, and any subtrees tree subtree (also in
Ideas
Front page Control the start of the answer, request background, background record the start time (the current time to make the request), plus the countdown time, the end time.The backend returns the remaining time to the front end, and the front end uses jquery to achieve the dynamic effect of the countdown.When the countdown is over, prohibit the answer, when the user refreshes the page, compare the request time and end time, if the forme
TopicGiven a non-empty array of digits representing a non-negative integer, plus one to the integer.The digits is stored such, the most significant digit was at the head of the list, and each element in the array conta In a single digit.Assume the integer does not contain any leading zero, except the number 0 itself.Example 1:Input: [[+]Output: [1,2,4]Explanation:the array represents the integer 123.Example 2:Input: [4,3,2,1]Output: [4,3,2,2]Explanati
freertos+cliAn extensible Command line Interface FrameworkIntroductionfreertos+cli (Command line Interface) provides a simple, small, extensible and RAM efficient method of enabling your F Reertos application to process command line input. The steps required to add a command is shown in the clickable diagram below- Click each stage in the process in Dividually to is taken to a worked example.The above is the official website about FREERTOS+CLI Simple Introduction, in the online search for a lon
one block added T o the message. For 8byte ciphers-like DES, we-then has a block of length 8b filled completely with 8s.AES CBC plus decryption principleCBC plus decryption principle as shown, image source WikipediaCBC encryption principle: PlainText with vector xor, and then encrypted with key, as the result of the next block initialization vector. Decryption principle: Use the key to decrypt the cipherte
MATLAB for speech signal plus random noise and denoising program(2011-01-28 23:26:51)% The original time-domain waveform analysis and spectrum analysis for language signals[Y,fs,bits]=wavread (' C:\Documents and settings\administrator\ desktop \cuocuo.wav ');% Sound (Y,FS)% playback of voice signalsN=length (y)% Select the number of points to transformY_p=fft (Y,n); % Fourier transform to frequency domain for n pointsf=fs* (0:n/2-1)/n; % corresponds t
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1. efficiency problems
2. Concurrent Insertion
The primary keys of SQL Server databases are designed in a variety of ways, such as classic auto-growth, happy guids, and IDs generated by time (throughProgramGenerate a meaningful id based on the combination of the business model. Recently, the project encountered a method to simulate auto-increment primary keys, that is, "Max plus one ".
The principle of Max
Given a non-negative number represented as an array of digits, plus one to the number. The digits is stored such, the most significant digit was at the head of the list.Test instructions: A non-negative integer is stored in the form of an array. Among them high in a[0]. It then adds 1 to this number and returns the array.PS: Forgive me again have read TEST instructions---!/***returnanarrayofsize*returnsize.*note:the Returnedarraymustbemalloced,assumec
HTML5 Plus specificationWhen you develop mobile apps through HTML5, you'll find that HTML5 has a lot of capabilities. In order to compensate for the shortcomings of HTML5 ability, under the guidance of China, the establishment of www.HTML5Plus.org organization, the introduction of html5+ norms.html5+ extension of JavaScript object Plus, so that JS can invoke a variety of browsers do not implement or impleme
In the Web page, the pixel and point ratios are called device-pixel-ratio, and the normal devices are 1,iphone 4 is 2, and some Android models are 1.5. ]Then-webkit-min-device-pixel-ratio:2 can be used to differentiate between the iphone (4/4S/5) and other phonesThe iphone4/4s resolution is 640*960 pixels,dpi is 320*480 and the device height is 480pxIPhone5 resolution of 640*1136 pixels,dpi is still 320*568, the device height is 568pxIPhone6 resolution of 750*1334 pixels,dpi is still 375*667, th
Plus + operatorIn JavaScript, the rule of addition is actually simple, in only two cases:
Add numbers and Numbers
Add a string and a string
All other types of values are automatically converted to these two types of values. In order to figure out how this implicit conversion works, we first need to understand some basic knowledge. Let's review it quickly. In JavaScript, there are two kinds of values:
Original Value (Primi
The MyBatis plus configuration primary key generation strategy is 2, which is to generate IDs using the Twitter snowflake algorithmThe spring boot is configured as:Globalconfiguration conf = new Globalconfiguration (new Logicsqlinjector ());Conf.setidtype (5);This generates a long type, and if you want to convert the ID to a string type, configure the primary key generation strategy to 5.https://gitee.com/baomidou/mybatis-
The MyBatis plus configuration primary key generation strategy is 2, which is to generate IDs using the Twitter snowflake algorithmThe spring boot is configured as:Globalconfiguration conf = new Globalconfiguration (new Logicsqlinjector ());Conf.setidtype (5);This generates a long type, and if you want to convert the ID to a string type, configure the primary key generation strategy to 5.https://gitee.com/baomidou/mybatis-
The MyBatis plus configuration primary key generation strategy is 2, which is to generate IDs using the Twitter snowflake algorithmThe spring boot is configured as:Globalconfiguration conf = new Globalconfiguration (new Logicsqlinjector ());Conf.setidtype (5);This generates a long type, and if you want to convert the ID to a string type, configure the primary key generation strategy to 5.https://gitee.com/baomidou/mybatis-
The MyBatis plus configuration primary key generation strategy is 2, which is to generate IDs using the Twitter snowflake algorithmThe spring boot is configured as:Globalconfiguration conf = new Globalconfiguration (new Logicsqlinjector ());Conf.setidtype (5);This generates a long type, and if you want to convert the ID to a string type, configure the primary key generation strategy to 5.https://gitee.com/baomidou/mybatis-
The MyBatis plus configuration primary key generation strategy is 2, which is to generate IDs using the Twitter snowflake algorithmThe spring boot is configured as:Globalconfiguration conf = new Globalconfiguration (new Logicsqlinjector ());Conf.setidtype (5);This generates a long type, and if you want to convert the ID to a string type, configure the primary key generation strategy to 5.https://gitee.com/baomidou/mybatis-
The MyBatis plus configuration primary key generation strategy is 2, which is to generate IDs using the Twitter snowflake algorithmThe spring boot is configured as:Globalconfiguration conf = new Globalconfiguration (new Logicsqlinjector ());Conf.setidtype (5);This generates a long type, and if you want to convert the ID to a string type, configure the primary key generation strategy to 5.https://gitee.com/baomidou/mybatis-
The MyBatis plus configuration primary key generation strategy is 2, which is to generate IDs using the Twitter snowflake algorithmThe spring boot is configured as:Globalconfiguration conf = new Globalconfiguration (new Logicsqlinjector ());Conf.setidtype (5);This generates a long type, and if you want to convert the ID to a string type, configure the primary key generation strategy to 5.https://gitee.com/baomidou/mybatis-
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