how to implement gamification

Given a function rand7 which generates a uniform random integer in the range 1 to 7, write a function rand10 which generate s a uniform random integer in the range 1 to 10.Don't use System ' s Math.random() .Example 1:[7]Example 2:[8,4]Example 3:[8,1,10]Note: rand7is predefined. Each testcase have one argument: n , the number of times is rand10 called. Follow up: What's the expected value for the number of calls to rand7() function? Could minimize the number of cal

Implement form Element value write-back Based on JQuery and jquery implement form Element Form. jsp: Jquery. form_util.js: /** Form Element writeback tool * wumingkun 2014-08-19 */var FormUtil = {// value writeback method set: function (obj) {var attr; for (attr in obj) {var element = $ ("#" + attr) [0]; var nodeName = element. nodeName; if (nodeName = "INPUT") {FormUtil. judgeType ($ (element ). attr (

Implement infinitus classification-Recursive Implementation, implement unlimited classification Recursion Public function getTree () {$ data = $ this-> select (); $ list = $ this-> _ getTreeData ($ data); return $ list ;} private function _ getTreeData ($ data = array (), $ parent_id = 0) {$ childs = $ this-> _ buildTree ($ data, $ parent_id ); // obtain all parent classes if (empty ($ childs) {return null

Implement left-slide deletion based on vue2 and vue2 implement slide Deletion Sliding left to delete, many UI frameworks, such as Mint-UI and Muse-UI, were used at the beginning, but our requirement was: when sliding left, img appears and click Delete, as shown below: Because the UI framework has to be changed to the underlying code ==, our team directly wrote a--, tired ...... This component is used in ma

Implement level-2 Interaction Based on jquery, and implement association based on jquery The examples in this article share the code for implementing level-2 interaction with jquery for your reference. The details are as follows: The above is all the content of this article. I hope it will be helpful for your learning and support for helping customers.

Use Notification in Android to implement the normal Notification bar (Notification Example 1), and implement the rest example in java. Notification is a message displayed outside of your application's general interface. When the app asks the system to send a message, the message is first displayed in the notification bar in a chart. To view the details of a message, go to the notification drawer. Icationica

Implement the MD5 algorithm using Swift introduce a third-party class library (MBProgressHUD), and implement the MD5 algorithm using Swift Previously, the project used the MD5 encryption algorithm written by objc, and recently used swift to rewrite previous projects. Fortunately, it was finally solved. This solution also introduces third-party class libraries, such as MBProgressHUD (SVProgressHUD) and some

Implement drop-down menus and drop-down containers with pure CSS (implement navigation bar and navigation drop-down container with pure CSS) and css navigation bar Although there are many similar and even the same cases on the internet, I still write down the notes for your reference. I hope you can guide the criticism ~~ First, we start with ul li in the list. We can also say that the navigation bar is cre

No need to explain, the code here should be able to explain the problem#include Implement a queue with two stacks, implement a stack with two queues, C + + STL version

First show you the running effect chart: 1. Background action generates JSON data . List blacklist = blackservice.getblackinfolist (Mobilenum, Gatewayid, StartDate, EndDate); int totalrows = Blacklist.size (); StringBuffer sb = new StringBuffer (); Sb.append ("{\" totalcount\ ": \" "+totalrows+" \ ","); Sb.append ("\" jsonroot\ ": ["); for (int i=0;i 2.struts.xml Related Configuration 3.js Get JSON data paging display function Getjsondata

Volley is used to implement waterfall flow, and volley is used to implement waterfall Flow Today, I stopped php and studied the source code of the Volley framework to implement the waterfall flow. To achieve the final waterfall effect, you need to have some knowledge: (1) custom layout. To listen for events that slide to the bottom, we need to

Teach you how to implement the verification code in php and implement the verification code in php. It is inconvenient to teach you how to implement a verification code in php. more and more verification codes are implemented in forms, so I learned how to implement the verification code in php and how to

[LeetCode-interview algorithm classic-Java implementation] [028-Implement strStr () (Implement strStr () function)],-javastrstr [028-Implement strStr () (Implement the strStr () function )][LeetCode-interview algorithm classic-Java implementation] [directory indexes for all questions]Original question

: This article mainly introduces queues and stacks: two stacks implement queues and two queues implement stacks. if you are interested in PHP tutorials, refer to them. 1. Question: use two stacks to implement a queue. First input data into one stack and then output the stack to another stack to form the first-in-first-out order of the queue. Because PHP arrays

choose? Listen to your suggestions. In fact, put logic in the program inside also divided into three kinds of situations. The first is weaker, invoking command-line commands in the programming language system, which is not recommended, is a last resort. For example, DB2 's load only C API, in Python and Perl do not implement the load module, it can only use the command line. The second is to use the Language database module to operate the database, i

PHP implements the password protection card function to implement code. you can download and run it directly ~! If you do not need a database or other data, you can download and decompress the data and put it in the environment to see the effect: Security Card warehouse receiving The code is as follows: $ This-> load-> model ('admin/m_mibao ');$ Data = array ();// Generate random abscissa$ Rand_str = $ this-> _ rand_str (10 );$ Arr = array ();For

of SAP enhancements and implementing them using projects. Concept of function exits. Knowledge on module pool-including subscreens, tabstrip controls etc. Steps Guidelines So, a developer can follow the guidelines mentioned below to implement a screen exit to a standard SAP transaction, as and when required: Find out the required enhancements Go to smod. press F4 in the enhancement field. in the next popup window, click Pushb

First implement the org. rut. util. algorithm. sortutil class (which will be used for each sort in the future ): Package Org. rut. util. algorithm; OK. Next we will start sorting; 1. Insert sorting: Package Org. rut. util. algorithm. support; 2. Bubble Sorting: Package Org. rut. util. algorithm. support; 3. Select sorting: Package Org. rut. util. algorithm. support; 4. Shell sorting: Package Org. rut. util. algorithm. support; 5

When developing a project, it takes a lot of time to obtain images from the Internet and then generate bitmap. The card will be very difficult during the sliding process. This seriously affects the user experience. The articles on the listview page are searched online. Now let's take a look at how to implement asynchronous loading. Public class asyncimageloader {// Image CachePrivate Map Public bitmap loaddrawable (final string imageurl, final imageca

Looking at the FMX code, there are two ways to implement message processing, one is to implement a custom message with Tmessagemanager, and the other is to declare the message method as an implementation in Tedit. Earlier, read the article said Tmessagemanager usage, available to the time, and can not find, had to do their own hands. My application scenario is this: the current frame pops up a dialog frame