object

手写LinkedList

◇◆丶佛笑我妖孽 提交于 2020-01-22 14:39:51
简单的实现了增加和删除方法,以及返回节点个数和返回所有元素值 直接上代码吧 首先创建了一个Node类,前指向,后指向以及数据 package Node; public class Node { private Node pre; private Node next; private Object value; public Node() { } public Node(Node pre, Node next, Object value) { this.pre = pre; this.next = next; this.value = value; } public Node getPre() { return pre; } public void setPre(Node pre) { this.pre = pre; } public Node getNext() { return next; } public void setNext(Node next) { this.next = next; } public Object getValue() { return value; } public void setValue(Object value) { this.value = value; } } 然后是具体实现 import Node.Node; public class

jquery 1.7.2源码解析(二)构造jquery对象

可紊 提交于 2020-01-22 14:21:27
构造jquery对象 jQuery对象是一个 类 数组对象。 一)构造函数jQuery() 构造函数的7种用法: 1.jQuery(selector [, context ]) 传入字符串参数:检查该字符串是选择器表达式还是HTML代码。如果是选择器表达式,则遍历文档查找匹配的DOM元素, 并创建一个包含这些DOM元素引用的jQuery对象。如果没有匹配的DOM,则创建一个length属性为0的空jQuery对象。 默认情况下对匹配元素的查找从根元素document开始,但也可以传入context参数限制查找范围。 如果选择器表达式是简单的'#id'且没有context参数,则调用document.getElementById()查找。 如果不是则调用jQuery的find()方法。 2.jQuery(html [, ownerDocument])、jQuery(html, props) 如果传入的参数是html代码,则尝试用html代码创建新的DOM元素,并创建包含这些DOM元素引用的jQuery对象。 如果html代码是单独的标签,使用document.createElement()创建DOM元素。如果是复杂的html代码,则使用innerHTML. 参数ownerDocument用于创建新DOM元素的文档对象,如果不传入默认为当前文档对象。 如果html代码是单独标签

C++ - If an object is declared in a loop, is its destructor called at the end of the loop?

[亡魂溺海] 提交于 2020-01-22 13:44:45
问题 In C++, an object's destructor is called at the closing "}" for the block it was created in, right? So this means that if I have: while(some_condition) { SomeClass some_object; some_object.someFunction(); some_variable = some_object.some_member; } Then the destructor for the object created in one iteration of the loop will be called at the end of the loop before another object is created, correct? Thanks. 回答1: Yes. But you could have tested it yourself. This is a language feature that

241 获取对象的属性名:Object.keys(对象)

青春壹個敷衍的年華 提交于 2020-01-22 12:20:33
Object.keys(对象) :获取到当前对象中的属性名 ,返回值是有元素为字符串的一个数组,效果类似 for…in。 <script> // 用于获取对象自身所有的属性 var obj = { id: 1, pname: '小米', price: 1999, num: 2000 }; var arr = Object.keys(obj); console.log(arr); // ["id", "pname", "price", "num"] arr.forEach(function(value) { console.log(value); }) </script> 来源: https://www.cnblogs.com/jianjie/p/12228184.html

判空工具类

て烟熏妆下的殇ゞ 提交于 2020-01-22 09:00:45
package utils ; import org . apache . commons . lang . StringUtils ; import java . util . * ; /** * 〈判空工具类〉 * 非空加!关键字即可 * * @author Barrett * @version 1.0.0 * @time 2020/1/6 */ public class ValidateUtil { /** * @Author Barrett * @Date 10:46 2020/1/6 * @Description 对字符串进行判空 * StringUtils.isBlank()可判断某个字段为null,""," ",三种类型 */ public static boolean isBlankToStr ( String s ) { return StringUtils . isBlank ( s ) ; } /** * @Author Barrett * @Date 10:46 2020/1/6 * @Description 对日期进行判空 */ public static boolean isBlankToDate ( Date date ) { if ( null == date ) return true ; return false ; } /** *

How to create a new unknown or dynamic/expando object in Python

守給你的承諾、 提交于 2020-01-22 08:20:06
问题 In python how can we create a new object without having a predefined Class and later dynamically add properties to it ? example: dynamic_object = Dynamic() dynamic_object.dynamic_property_a = "abc" dynamic_object.dynamic_property_b = "abcdefg" What is the best way to do it? EDIT Because many people advised in comments that I might not need this. The thing is that I have a function that serializes an object's properties. For that reason, I don't want to create an object of the expected class

jsonschema 简介

岁酱吖の 提交于 2020-01-22 05:36:59
转载地址: https://www.cnblogs.com/terencezhou/p/10474617.html https://www.cnblogs.com/ChangAn223/p/11234348.html jsonschema 简介 假设现有 web api 请求参数为 json数据,例: { "name" : "lisi" , "age" : 20, "appearance" : { "high" :180.0, "weight" :140.0 } } 以上例子 json数据包含 name、age、appearance等参数,为此Json Schema定义一套定义 json数据格式的规则,在api请求时对json 参数进行验证( Json Schema Validator ) { "type" : "object" , "properties" : { "name" : { "type" : "string" } , "age" : { "type" : "integer" } , "appearance" : { "type" : "object" , "properties" : { "high" : { "type" : "number" } , "weight" : { "type" : "number" } } } } } 文章目录 jsonschema

How can I check if an object method exists? [duplicate]

佐手、 提交于 2020-01-22 03:39:11
问题 This question already has answers here : Is there a way to check if a function exists within a class? (3 answers) Check if method exists in the same class (4 answers) Closed 9 months ago . I want to use some code only if the method getProductgroup exists. My first approach: if(isset($item->getProductgroup())){ $productgroupValidation = 0; $productgroupId = $item->getProductgroup()->getUuid(); foreach($dataField->getProductgroup() as $productgroup){ $fieldProductgroup = $productgroup->getUuid(

Get object with string identifier

a 夏天 提交于 2020-01-22 02:40:08
问题 I need help with getting property of object with String in JS. I have object elements = { element : { date: { day: 'Monday' } } } and i have JS function where input is "element.date.day" . And basically i need to do something like this: function getObjectByStringIdentifier ( stringId ) { return elements[stringId]; } is this possible in JS ? 回答1: You can do something like this var elements = { element: { date: { day: 'Monday' }, example: { abc: 'hii' } } }; function getObjectByStringIdentifier

Get the sum of all specified elements in an array of objects

ぃ、小莉子 提交于 2020-01-22 02:36:26
问题 I have an array of objects as folllows [ {"width":128.90663423245883,"height":160,"X":0,"Y":140}, {"width":277.0938568683375,"height":263,"X":128.90663423245883,"Y":37}, {"width":264.8267031014369,"height":261,"X":277.0938568683375,"Y":39}, {"width":229.14003389179788,"height":60,"X":264.8267031014369,"Y":240}, {"width":10.032771905968888,"height":177,"X":229.14003389179788,"Y":123} ] I am looking to write a function that gets the sum of all 'width' elements in the object before the current.