Found a total of 2679 related content
Java method to determine whether socket is disconnected
Article Introduction:How to determine whether the socket is disconnected in java: You can use the sendUrgentData method in the socket class to determine whether the SO_OOBINLINE attribute of the socket is turned on. An exception will be thrown in java.
2019-12-27
comment 0
2386
vue怎么判断跳转页面
Article Introduction:在 Vue.js 中,使用 $route 对象判断当前页面:判断路径:使用 $route.path 和 includes() 方法判断页面是否为特定路径或其子页面。判断组件:使用 $route.meta.component 属性判断页面是否为特定组件。判断参数:使用 $route.query 或 $route.params 对象判断页面是否包含特定查询字符串或动态路由段参数。
2024-05-27
comment 0
366
How to judge html
Article Introduction:How to judge HTML HTML, that is, Hypertext Markup Language, is an important part of Web page development. During the web development process, developers need to judge and debug HTML to ensure the correctness of the HTML page. The following will introduce the judgment method of HTML. 1. Whether to use HTML syntax tags. The first thing to determine is whether the HTML code uses correct syntax tags. HTML tags are surrounded by <> symbols. For example, the <p> tag is used to define a paragraph, and the <h1> tag is used to define a first-level heading. If not used correctly
2023-05-09
comment 0
1195
How to determine whether it is an object in javascript
Article Introduction:Judgment method: 1. Use toString() to judge; 2. Use "obj.constructor === Object" to judge; 3. Use "ypeof obj === Object" to judge; 4. Use the instanceof keyword to judge.
2021-03-30
comment 0
15740
mysql stored procedure judgment
Article Introduction:As one of the most popular relational database management systems, MySQL supports stored procedures that can help developers process complex business logic more efficiently. When developing stored procedures, judgment statements are also an indispensable part. This article will explore in detail the functions, usage scenarios, and syntax of judgment statements. 1. The function of the judgment statement The main function of the judgment statement in the MySQL stored procedure is to judge whether a certain condition is true, so that different code logic can be executed according to different situations. Common judgment statements include if-else statements and ca
2023-05-20
comment 0
612
How to determine whether jquery is an integer
Article Introduction:How jquery determines whether it is an integer: 1. Use the remainder operator to determine; 2. Use "Math.round" to determine; 3. Judge through parseInt; 4. Judge through bit operations; 5. Judge through Number.isInteger provided by ES6 Whether it is an integer.
2020-12-11
comment 0
2424
How to determine whether it is an integer in javascript
Article Introduction:Methods for judging whether it is an integer in JavaScript: 1. Use the remainder operator to judge; 2. Use Math.round, Math.ceil, Math.floor to judge; 3. Judge through parseInt; 4. Judge through bit operations.
2021-04-06
comment 0
4479
How to determine whether it is an integer in javascript
Article Introduction:Method: 1. Use the remainder operator to judge; 2. Use the "Math.round", "Math.ceil", and "Math.floor" methods to judge; 3. Use the parseInt function to judge; 4. Use bit operations To judge; 5. Use "Number.isInteger" to judge.
2021-03-30
comment 0
2936
Java determines whether a string is empty
Article Introduction:How to determine whether a string is empty in Java: 1. Use "str!=null" to determine. Null means that the string does not point to anything. 2. Use "".equals(str) to judge. 3. Use the "str.length()!=0" method to determine.
2019-12-30
comment 0
2547
jquery determines whether it is empty
Article Introduction:jQuery is a very popular JavaScript library that provides many convenient methods to simplify the development process. Among them, determining whether a variable is empty is one of the problems that often needs to be solved when writing JavaScript. In jQuery, there are many ways to determine whether a variable is empty. This article will introduce several common methods to help readers better understand the judgment mechanism in jQuery. 1. Use the if statement to determine whether the variable is empty. The if statement is the most basic judgment statement when writing JavaScript.
2023-05-08
comment 0
1631
jquery determines whether radio is selected
Article Introduction:The jquery method to determine whether the radio is selected: first use the "$('input:radio:checked').val();" method to obtain the value in the radio; then determine whether the radio is selected by determining whether the radio is empty.
2021-02-03
comment 0
2889
How to judge empty string in jquery
Article Introduction:The method of judging the empty string in jquery: 1. Judge by judging whether the length of the string is 0; 2. Judge by judging whether the string is equal to null, undefined, etc. The code is [if(str==null||str ==undefined||str=="")].
2020-12-01
comment 0
2511
js determines whether the value is a number
Article Introduction:js method to determine whether a value is a number: 1. Use the isNaN() function to determine whether the value is a number; 2. Use regular expressions to determine whether the value is a number; 3. Use the parseFloat() function to determine whether the value is a number.
2021-03-01
comment 0
37726
js中indexof怎么判断
Article Introduction:使用 JavaScript 中的 indexOf() 方法判断数组中元素是否存在,其原理如下:直接判断元素是否存在:indexOf() 返回元素的下标存在,否则返回 -1。判断元素从特定位置开始是否存在:指定第二个参数为搜索起始位置。判断元素在数组中最后出现的位置:第二个参数为负数,从末尾向前查找。
2024-05-11
comment
364
Java determines whether an object is empty
Article Introduction:How to determine whether an object is empty in java: 1. Use StringUtils under the org.apache.commons.lang package to determine. 2. Use StringUtils under the org.springframework.util package to judge.
2019-12-25
comment 0
8382
yii determines whether post submission
Article Introduction:How to determine whether a post submission is made in Yii: In the controller, determine whether the submission is through the post method. Use the "if(Yii::$app->request->isPost)" statement to determine. If the condition is true, it means a post submission.
2020-01-11
comment 0
2123
How uniapp determines the current environment
Article Introduction:The method for uniapp to determine the current environment: 1. To determine if it is Apple, the code is [uni.getSystemInfoSync().platform=='ios']; 2. To determine if it is Android, the code is [uni.getSystemInfoSync().platform=andr].
2020-12-09
comment 0
4634
golang时间怎么判断
Article Introduction:使用 time 包中的函数(time.Now()、time.Since()、time.Sleep()),通过 fmt 包(fmt.Println、fmt.Printf)格式化时间,借助 strings 包(strings.Contains、strings.Split)操作字符串,可以实现时间判断。示例包括判断时间是否在指定范围内和判断当前时间是否位于特定时区。
2024-05-26
comment 0
704
laravel determines the request page
Article Introduction:As a popular PHP framework, Laravel's biggest feature is its flexibility and ease of use. During the development process, how to determine the requested page is a topic we need to always pay attention to. This article will give a brief introduction to the related methods of judging the requested page in Laravel. 1. Determine the request method 1.1. Use the isMethod method of the Request class. The isMethod method of Laravel's Request class can be used to determine the request method. For example: ```phpuse Illumin
2023-05-26
comment 0
397
c++如何判断素数
Article Introduction:为判断整数是否为素数,执行以下步骤:定义函数 isPrime(num),判断 num 是否为素数。特殊情况:若 num 为 0 或 1,返回 false,因它们不是素数。循环判断:从 2 到 num 开方值,检查 num 是否可被这些数字整除。若可整除,则 num 不是素数,返回 false。判断结果:若循环结束,num 未被任何数整除,则 num 为素数,返回 true。
2024-05-29
comment
721