small database

A few small examples of linq and a small example of linq Private void button#click (object sender, EventArgs e) {int [] numbers = new int [7] {0, 1, 2, 3, 4, 5, 6 }; var result0 = from num in numbers where (num % 2 = 0) select num; foreach (int n in result0) {listBox1.Items. add (n) ;}} private void button2_Click (object sender, EventArgs e) {listBox1.Items. clear (); int [] numbers = new int [7] {2, 3, 4,

I sorted out a small tool class from Lao Zhao, a small tool class for testing, and a tool class from Lao Zhao. I sorted out a test tool class from Lao Zhao without changing anything else. I just changed the class name and method name to a name that I prefer. The Code is as follows: /// /// Code performance tester/// Public static class CodePerformanceTester{/// /// The initialization tool first sets the pri

#include http://tool.lu//650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/7F/4D/wKiom1cZez3BQ1rlAADdyHKdD7Y000.png "title=" m5.png "alt=" Wkiom1czez3bq1rlaaddyhkdd7y000.png "/>Small Code Algorithm Small topic

Organize knowledge in small and small ways 1. virtual override in C # class A{ public A() {} public void print1() { Console.WriteLine("print1"); } public virtual void print2() { Console.WriteLine("print2"); }} class AA: A{ public AA() {} public void print1() { Console.WriteLine("print1a"); } public override void print2() { Console.WriteLine("print2a"); }} class Progr

Small knowledge (3): class and small knowledge Class is an abstract concept. For example, the Dog class describes some characteristics of a Dog, such as weight, height, age, and roar. Public class Dog { String dogBreed; // dog breed Int weight; // weight Int height; // raise Int age; // age Public void bellow () { Console. WriteLine ("trademanager "); } } This Dog class is abstract and describes some featur

Small knowledge (4): inheritance, small knowledge inheritance Method Rewriting: The virtual keyword of the base class method identifier, and the override keyword of the method rewriting identifier in the subclass (inheritance class. The override method must be of the same type as the base class, such as the method name, return, and accept parameters. Public class Class1 { PublicVirtualVoidshow (int I) {....

) VisibilitySpecifies whether the element is visible, even if it is not visible, it occupies the space above, in this case it is not the same as the display.(2) DisplayThis property is used to define the type of display box generated by the element when the layout is established. For document types such as HTML, it can be dangerous to use display without caution because it may violate the display hierarchy already defined in HTML. For XML, all display is absolutely necessary because XML does not

C ++ small knowledge accumulation and small knowledge accumulation 1. Create and sort a vector 1. vector: c ++ container, similar to an array, but not limited to length. 2. input, output, and sorting of basic types: 1 # include Result: 3. Sort struct types: 1 # include Result: 2. Split string into char [] -- strtok () 1 # include Result: Iii. Convert string to int -- atoi () Connection code: *** # in

In the php Laraver framework, try catch does not work to solve the problem of a small stack, laraver small stack Recently usedLaravel frameworkFound,Try catch is ineffective, Cannot capture exceptions, ThenThink frameworkI tried it and found thatNo! Try {$ I = 1/0;} catch (Exception $ e) {echo "error ";} Finally, the problem is found in the Exception class! Add\(Backslash ). Like this Try {$ I = 1/0;

Small clock in the garden, small clock in the garden

Let me give you an example.Now static pages, there are many will be inserted Baidu map, especially businessmen, or enterprise stationFor exampleClick to view Baidu mapwill enter this page.You can also embed the HTML code of the map into a div by embedding it directly in the page.Let's get down to the chase and see how we got the map code.First open Baidu, enter Baidu map four wordsClick to searchAfter entering, find this itemClick Create MapWhen you open this page, that's it.You can search for t

Bitwise operators :>>> unsigned right-shift operators, rules for unsigned right shifts, and rules to move right also, just as the fill, no matter whether the original positive or negative are added with the zero.Array:ARR1=ARR2; At this point two array variables will point to the same array at the same time, that is, the array pointed to by ARR2, assuming arr2 points to the array changes, then arr1 and arr2 are changed.Use Arrays.sort to sort (using a quick row)Magic square Matrix : (direct to i

To the U.S. Mito software users to detailed analysis to share the production of small-country effect of the tutorial. Tutorial Sharing: First look at the contrast effect chart: Figure 1 Want to make the synthesis effect natural, must pay attention to the character and the background collocation Oh! Let's pick up the photos and do it. See: 1, in the "Beauty Mito" open to deal with a person's body ph

Some children are worried about the closure of Tencent mobile phone butler after the small rocket will lose the optimization of the function of the phone, this does not worry about just close the tube hint. 1. To turn off this feature, we need to enter the mobile phone in the Tencent Mobile Butler, and then click on the right side of the "Avatar" icon 2. After opening the avatar, we click on "Common Settings" and click on the Open 3. Click

posts_content = [ { date: "2018/8/16", title: "荷塘月色", post_img: '/images/post/crab.png', content: '这几天心里颇不宁静。今晚在院子里坐着乘凉，忽然想起日日走过的荷塘，在这满月的光里，总该另有一番样子吧。', view_num: "100", collect_num: '50', author_img: '/images/avatar/1.png' }, { date: "2018/7/15", title: "背影", post_img: '/images/post/bl.png', content: '我与父亲不相见已二年余了，我最不能忘记的是他的背影 。那年冬天，祖母死了，父憨穿封费莩渡凤杀脯辑亲的差使也交卸了，正是祸不单行的日子', view_num: "120", col

This article mainly introduces the Laravel small program to obtain user details and the analysis with the parameter code extension, has a certain reference value, now share to everyone, the need for friends can refer to function Introduction This Extension pack contains user details for decryption, with the parameter applet generated and saved in the local directory feature. User Details decryption is also available in multiple language versio

Problem DescriptionLittle T recently learned C, he wants to show his ability in front of his girlfriend, small w like the figure shown in the example,Want to let small t write a program to output such a graphic, little t get after feeling a little difficult, little t don't want to embarrass in front of girlfriend,So smart you come and help him.InputThe number of columns that the input graph occupies n (nOut

First introduce the next background, my undergraduate major is hardware to software, so the first algorithm based on poor, have not done system design, in order to get a good interview opportunity, I have been working hard to prepare, but also on the internet to focus on a variety of ways to improve the ability of programming, I think the premise is to lay a good foundation for learning resources, This can be more effective, should not be searched on the Internet some of the quality of the probl

Background: In the development of telecom industry software, the document has such provisions: two machines using big-machine mode for transmission. My head is covered, the first time I heard big machine, small end machine. Then it took a day to learn, and now tidy it up. First, to understand that the big-end machine, small-ended machine is just a storage mode, is the data in memory storage mode. Th

Town Field Poem:Cheng listens to the Tathagata language, the world name and benefit of Dayton. Be willing to do the Tibetan apostles, The broad show is by Sanfu Mention.I would like to do what I learned, to achieve a conscience blog. May all the yimeimei, reproduce the wisdom of the Body.——————————————————————————————————————————Codemylist=[1,3,2,5,61,123] #从小到大排序myList. sort () print (myList) #从大到小排序myList. sort (reverse = True) print (myList)Result——————————————————————————————————————————The