enter

react中键盘enter事件处理

匿名 (未验证) 提交于 2019-12-02 21:53:52
对于常见的搜索需求业务场景,用户输入完成后,点击enter事件请求数据,要求不提交页面,实现数据局部更新,这需要用到react中的表单Forms。 处理方法: (1)html书写 form标签中去掉action参数,定义onSubmit方法,如下所示: <div className="mc2"> <form onSubmit={(e) => this.getSearchData(e,this.state.searchkey)}> <b></b> <input name="searchkey" type="text" className="search" placeholder="请输入关键字" value={this.state.searchkey} onChange={(e) => this.change(e.target.name,e.target.value)}/> </form> </div> (2)事件处理 关键的是阻止掉页面默认提交: getSearchData(event,name) { //ajax处理 event.preventDefault();//阻止页面提交刷新}    文章来源: react中键盘enter事件处理

java输入时想通过回车(enter)来结束输入的解决办法

匿名 (未验证) 提交于 2019-12-02 21:35:04
在编写java程序的时候,我们想通过输入回车来完成这一行的输入,这是一个非常常见的问题,但是如果我们是用Scanner ,然后通过nextInt()方法调用的时候,不会停止输入,回打出一个空行,然后等着你继续输入下一个数字。下边提供解决办法: 我们可以设置两个Scanner 第一个以行为单位读取数据,这样就相当于是用回车(enter)当作结束符, 然后把读取到的字符串传入第二个Scanner, 然后在进行处理 ArrayList < Integer > arr = new ArrayList ( ) ; System . out . println ( "Enter a space separated list of numbers:" ) ; Scanner in = new Scanner ( System . in ) ; String line = in . nextLine ( ) ; Scanner in2 = new Scanner ( line ) ; while ( in2 . hasNextInt ( ) ) { arr . add ( in2 . nextInt ( ) ) ; } System . out . println ( "The numbers were:" + arr . toString ( ) ) ; 只需要把nextInt

How to simulate tab key with enter key on javascript

徘徊边缘 提交于 2019-12-02 09:34:42
问题 <script type="text/javascript"> function onDataBound(e) { $("#batchgrid").on("click", "td", function (e) { $("input").on("keydown", function (event) { if (event.keyCode == 13) { event.keycode=9; return event.keycode; } }); }); } </script> here i'm using above script to fire tab key press event when i press the enter key .but it doesn't behave as tab key pressed when i press the enter key. please help me here.. 回答1: return event.keycode is effectively return 9 , and even return event will not

How to simulate tab key with enter key on javascript

守給你的承諾、 提交于 2019-12-02 08:05:43
<script type="text/javascript"> function onDataBound(e) { $("#batchgrid").on("click", "td", function (e) { $("input").on("keydown", function (event) { if (event.keyCode == 13) { event.keycode=9; return event.keycode; } }); }); } </script> here i'm using above script to fire tab key press event when i press the enter key .but it doesn't behave as tab key pressed when i press the enter key. please help me here.. return event.keycode is effectively return 9 , and even return event will not help, as returning the event does not mean that will be handled properly, what you probably want to do

Handle “Enter” key on Jelly Bean

谁说我不能喝 提交于 2019-12-02 07:11:24
问题 I'm making an application, in this application I have edit text. I want when user write some text in edit text end then press enter button, I want it call some command. This what i have been done. This is work in ICS, but when I try on other device (Jelly Bean) it doesn't work. inputViaTextChatbot.setOnEditorActionListener(new OnEditorActionListener() { public boolean onEditorAction(TextView v, int actionId, KeyEvent event) { if ((event != null && (event.getKeyCode() == KeyEvent.KEYCODE_ENTER

对拍方法

偶尔善良 提交于 2019-12-01 23:22:18
目录 对拍原理 对拍步骤 代码解释: @echo off data.exe/std.exe/test.exe time<enter fc std.out test.out || pause %0 首先声明:对拍有很多种方法,此处仅展示一种 (其实是因为我只会一种) 。 对拍原理 对拍的目的是通过大量数据验证某一算法或数据结构的正确性。因此对拍首先需要一个保证正确的算法(一般是暴力算法)提供所谓“标准答案”,此外还需要一个“数据生成器”,用来生成输入数据,最后通过批处理文件将两者进行比较,如果没有问题就生成下一组数据进行比较,如果两者不同就自动停止,表明找到了一个反例。 对拍步骤 第0步:确保文件资源管理器设置为显示扩展名。如果设置为不显示,打开的方法是:“文件资源管理器 \(\rightarrow\) 查看 \(\rightarrow\) 显示扩展名”。 第1步: 最好 建立一个独立文件夹,因为对拍所需要的源程序与其他文件较多。 第2步:新建一个文本文件(其实任意类型均可),将名称改为“enter”( 注意没有扩展名 ) 第3步:写三个程序:第一个是数据生成器(不妨设为data.cpp,将输入数据写入data.in文件中),第二个是提供标准答案的程序(不妨设为std.cpp,从data.in文件中读取输入数据,将答案写入std.out文件中),第三个是验证的算法的程序

How do I exit a while loop by pressing enter?

核能气质少年 提交于 2019-12-01 13:34:46
I am trying to get a while loop to break by pressing the Enter key on a keyboard. My code is: package javaapplication4; import java.util.ArrayList; import java.util.Scanner; public class JavaApplication4 { public static void main(String[] args) { Scanner keyboard = new Scanner(System.in); ArrayList<Double> numbers = new ArrayList( ); while (true) { System.out.println("Please enter the numbers seperated by a space: "); numbers.add(keyboard.nextDouble()); //want the while loop to break here by pressing "enter" after entering array values } System.out.println(numbers); } Don't use a loop for

What is the best practice to simulate an ENTER or RETURN using Selenium WebDriver

混江龙づ霸主 提交于 2019-12-01 13:28:38
I came across this solution to my initial problem, which was to simulate an ENTER or RETURN key press using Selenium WebDriver. However, in my code, I strictly want to use only one of the two WebElement.sendKeys(Keys.ENTER); vs WebElement.sendKeys(Keys.RETURN); . What is the best practice when doing the same, since there seems to be divided opinion about using enter or return, since both work MOST of the time? In what scenarios would one or the other not work, and is there one which would ALWAYS work? As a performancewise I do not get any change on both of these, But yes I know one difference

What is the best practice to simulate an ENTER or RETURN using Selenium WebDriver

孤街醉人 提交于 2019-12-01 11:43:35
问题 I came across this solution to my initial problem, which was to simulate an ENTER or RETURN key press using Selenium WebDriver. However, in my code, I strictly want to use only one of the two WebElement.sendKeys(Keys.ENTER); vs WebElement.sendKeys(Keys.RETURN); . What is the best practice when doing the same, since there seems to be divided opinion about using enter or return, since both work MOST of the time? In what scenarios would one or the other not work, and is there one which would

how can I dismiss keyboard on Enter keypress

牧云@^-^@ 提交于 2019-12-01 11:09:35
I want to dismiss my keyboard as I press RETURN key. I have tried by putting button in view's back side. But how can I do this by pressing RETURN key? Chakalaka -(BOOL)textFieldShouldReturn:(UITextField *)textField { [textField resignFirstResponder]; return YES; } Don't forget to add the delegate UITextFieldDelegate I hope you have done UIViewController <UITextFieldDelegate> and yourTextField.delegate=self ; and then in the delegate method - (BOOL)textFieldShouldReturn:(UITextField *)textField; { [textField resignFirstResponder]; return YES; } I'm presuming you're talking about a UITextField