children

lxml xpath expression for selecting all text under a given child node including his children

由 拜拜、爱过 提交于 2020-08-10 19:17:50
问题 Provided I have a XML as follows: <node1> <text title='book'> <div chapter='0'> <div id='theNode'> <p xml:id="40"> A House that has: <p xml:id="45">- a window;</p> <p xml:id="46">- a door</p> <p xml:id="46">- a door</p> its a beuatiful house </p> </div> </div> </text> </node1> I would like to locate text title and get all the text from the first p tag appearing inside the text title book node so far I know: from lxml import etree XML_tree = etree.fromstring(XML_content,parser=parser) text =

How to safely inject props into React children?

由 让人想犯罪 __ 提交于 2020-08-05 11:08:59
问题 I am building a React component which delays the unmounting of its children in order to animate them. When unmounting, I would like to pass in an additional prop (for example, a data-attribute or a class name) in order to handle animations. This is a specific instance of a general situation where I want override certain properties of children. I have come to realize that the following pattern does exactly what I want: this.props.children.map(child => <child.type key={child.key} ref={child.ref

How to safely inject props into React children?

由 社会主义新天地 提交于 2020-08-05 11:08:56
问题 I am building a React component which delays the unmounting of its children in order to animate them. When unmounting, I would like to pass in an additional prop (for example, a data-attribute or a class name) in order to handle animations. This is a specific instance of a general situation where I want override certain properties of children. I have come to realize that the following pattern does exactly what I want: this.props.children.map(child => <child.type key={child.key} ref={child.ref

How to safely inject props into React children?

由 僤鯓⒐⒋嵵緔 提交于 2020-08-05 11:08:52
问题 I am building a React component which delays the unmounting of its children in order to animate them. When unmounting, I would like to pass in an additional prop (for example, a data-attribute or a class name) in order to handle animations. This is a specific instance of a general situation where I want override certain properties of children. I have come to realize that the following pattern does exactly what I want: this.props.children.map(child => <child.type key={child.key} ref={child.ref

How to safely inject props into React children?

由 纵饮孤独 提交于 2020-08-05 11:08:32
问题 I am building a React component which delays the unmounting of its children in order to animate them. When unmounting, I would like to pass in an additional prop (for example, a data-attribute or a class name) in order to handle animations. This is a specific instance of a general situation where I want override certain properties of children. I have come to realize that the following pattern does exactly what I want: this.props.children.map(child => <child.type key={child.key} ref={child.ref

VueJs Tree recursive elements emits to parent

由 我与影子孤独终老i 提交于 2020-05-13 11:40:06
问题 How do you emit event inside recursive child components vuejs Taking the tree example from vue site https://vuejs.org/v2/examples/tree-view.html How would you transmit on click to the parent each clicked elements id? 回答1: In the case of recursive elements, you can create an event bus in the parent, pass it to the children as a prop, and have each prop pass it to any children they generate. Each child emits events on the bus, and the parent handles them. I copied the tree-view exercise you

Css, Safari :hover and child visibility

由 懵懂的女人 提交于 2020-04-18 03:54:22
问题 I have one issue with Safari. My page displays a video player with some controls that are made visible ( visibility: visible ) when the mouse move over the player. This "effect" is achieved with a simple CSS rule that fails under Safari. <div class="player"> <!-- ... --> <ol class="player-controls"> <li>Prev.</li> </ol> </div> .player-controls li { visibility: hidden; } .player:hover .player-controls li, .player .player-controls:hover li, .player .player-controls li:hover, .player:fullscreen

文件路径选择中的三态逻辑

由 六眼飞鱼酱① 提交于 2020-04-06 11:00:20
文件路径选择中的三态逻辑，效果图如下： 代码如下： private bool? _isChecked = false; /// <summary> /// 是否已选择 /// </summary> public bool? IsChecked { get { return _isChecked; } set { if (value != null) { SetIsChecked(SetIsCheckedDirection.Both, value); } else if (value == null && this.IsFolder) { //文件夹选择为空的情况处理 SetIsChecked(SetIsCheckedDirection.Both, !_isChecked); } } } public void SetIsChecked(SetIsCheckedDirection direction, bool? isChecked) { this._isChecked = isChecked; this.OnPropertyChanged("IsChecked"); if ((direction & SetIsCheckedDirection.Children) == SetIsCheckedDirection.Children) { if (isChecked != null)

react 中的this.props.children

由 江枫思渺然 提交于 2020-03-30 19:31:38
来看示例 我在Login自定义组件中引入了自定义组件system import React, { Component } from 'react'; import SYSTEM from './system' export default class Login extends Component{ constructor(props){ super(props) this.state={ } } render(){ return ( <div> <SYSTEM name="第一">天</SYSTEM> <SYSTEM name="第二">下</SYSTEM> <SYSTEM name="第三">第</SYSTEM> <SYSTEM name="第四">一</SYSTEM> </div> ) } } 然后我在自定义组件system中打印this.props,发现this.props.children原来是写在标签中间的内容 来源： https://www.cnblogs.com/tlfe/p/12600157.html

589. N叉树的前序遍历

由 别说谁变了你拦得住时间么 提交于 2020-03-20 03:07:12
给定一个 N 叉树，返回其节点值的 前序遍历 。 例如，给定一个 3叉树 : 返回其前序遍历: [1,3,5,6,2,4] 。 说明: 递归法很简单，你可以使用迭代法完成此题吗? class Solution { public List<Integer> res = new ArrayList<>(); public List<Integer> preorder(Node root) { if(root == null) return res; res.add(root.val); for(Node node : root.children) { preorder(node); } return res; } } /* // Definition for a Node. class Node { public int val; public List<Node> children; public Node() {} public Node(int _val,List<Node> _children) { val = _val; children = _children; } }; */ class Solution { public List<Integer> preorder(Node root) { List<Integer> res = new ArrayList
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