padding | 易学教程

html css 笔记

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html概述和基本结构相关概述 web 万维网 web前端的构成：结构(html实现),样式(css),行为(js) html 超文本标记语言，超文本指的是超链接，标记指的是标签，是一种用来制作网页的语言，这种语言由一个个的标签组成，用这种语言制作的文件保存的是一个文本文件，文件的扩展名为html或者htm，一个html文件就是一个网页，html文件用编辑器打开显示的是文本，可以用文本的方式编辑它，如果用浏览器打开，浏览器会按照标签描述内容将文件渲染成网页，显示的网页可以从一个网页链接跳转到另外一个网页。 html基本结构 <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>网页标题</title> </head> <body> 网页显示内容 </body> </html> html标题标签通过h1 h2 h3 h3 h4 h5 h6 ,标签可以在网页上定义6种级别的标题,h1定义最大的标题，h6定义最小的标题。 <h1>这是一级标题</h1> <h2>这是二级标题</h2> <h3>这是三级标题</h3> p标签标签定义一个文本段落，一个段落含有默认的上下间距，段落之间会用这种默认间距隔开。 <!DOCTYPE html> <html lang="en"> <head> <meta

Adding padding to select options

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I want to add some kind of space(padding, margin or whatever) between select options in html using css. I've already tried using something like: select option { padding:10px } however it didn't work. I've already read that this is possible to do but it does not work in IE. Anyway, i'd like to have this to work in other browsers even if it doesn't work in IE. PS: currently using Chrome JSFiddle example styling to select option is very much limited as to maintain a coherence and consistency among all the application in the operating system thus the browser are ought to restrict the style of some

GridView and excess space padding

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I have a problem with grid view layout on Android. I can't find solution to eliminate extra space in grid view. I tried a lot of things (numColumns, columnWidth, stretchMode, gravity) and advices (from StackOverflow), but nothing works correctly. I spent almost 8 hours with this problem. Here is a code of grid view: <GridView android:id="@+id/lookbook_gridview" android:layout_width="fill_parent" android:layout_height="wrap_content" android:listSelector="@null" android:padding="0dip" android:layout_margin="0dip" android:verticalSpacing="0px" android:horizontalSpacing="0px" android:numColumns=

【深度网络】Non-local Neural Networks

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原文链接： Non-local Neural Networks 博文参考了这篇博主的部分理解，传送门： KFXW Motivation 作者主要是想解决non-local的问题。在目前的深度网络中，一系列的卷积层构成了深度网络的主要架构，每一层网络可以理解为用一个核在该层输入上做卷积操作，由于卷积核通常是1X1， 3X3这种固定的尺寸，这使得输出feature map只能感受到对应输入fearute map点上周围点的信息，当网络层数加深时，feature map的感受野才会慢慢增大。这使得深度网络在融合非局部信息的时候，会有明显的不足。此外，对于时序性的任务（视屏，语音，文字）而言，深度网络很难融合时序上的信息，这对这些任务而言可以说是一种信息浪费。 Contribution 基于以上原因，作者受non-local means的启发，提出了一种非局部模块（non-local block），这种模块可以将同一图像上相隔很远的像素点联系起来，也可以将视频中前后几帧中同一空间的像素联系起来。 Non-local Neural Networks 首先看看文中对non-local 的定义：对于图像而言，Xi，Xj表示两个像素点，f 用来度量二者之间的关系，g 是一个只与Xj有关的函数。作者表示 f 和 g 的选取有很多种，示例中选取的 f 是一个高斯函数我的理解是可以认为 f

HTML: IE: Right padding in input text box

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问题 Go to http://jsfiddle.net/srLQH/ and fill in the input text box in the "Result" view. If you do this in FF, Chrome, and Safari, your text will stop 20px short of the right side. In IE 7/8, the text does not stop 20px short--it goes all the way to the edge of the input box. What's the deal with IE? How can I get the same padding effect in IE that all the other browsers give me? 回答1: I have been looking for a way to solve this. A colleague found a solution and we tested it and it works

Why do Java objects have to be a multiple of 8?

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问题 I know that Java uses padding; objects have to be a multiple of 8 bytes. However, I dont see the purpose of it. What is it used for? What exactly is its main purpose? 回答1: Its purpose is alignment, which allows for faster memory access at the cost of some space. If data is unaligned, then the processor needs to do some shifts to access it after loading the memory. Additionally, garbage collection is simplified (and sped up) the larger the size of the smallest allocation unit. It's unlikely

【CSS属性#2】 -- 2019-08-17 05:21:34

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原文: http://blog.gqylpy.com/gqy/256 " 目录一、盒子模型二、外边距 margin 三、内填充 padding 四、浮动 float 五、清除浮动 clear 六、溢出 overflow 七、定位 position 1. 无定位 static 2. 相对定位 relative 3. 绝对定位 absolute 4. 固定 fixed 八、层叠顺序 z-index 九、透明度 opacit 一、盒子模型 margin ：用于控制元素与元素之间的距离；最基本的用途就是控制元素周围空间的间隔，从视觉上达到相互隔开的目的 padding ：用于控制内容与边距之间的距离 Border ：边框，围绕在内边距和内容外的边框 Content ：盒子的内容，显示文本和图像 ![在这里插入图片描述](http://blog.gqylpy.com/media/ai/2019-03/3820234e-236e-4ff2-af57-94cab2575a05.png) 二、外边距 margin 属性描述 margin-top 上方外边距 margin-right 右方外边距 margin-bottom 下方外边距 margin-left 左方外边距简写： ![在这里插入图片描述](http://blog.gqylpy.com/media/ai/2019-03

【CSS属性#2】 -- 2019-08-17 05:14:22

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How do you specify table padding in CSS? ( table, not cell padding )

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问题 I have a table with a colored background and I need to specify the padding between the table and it's content, I.E. cells. The table tag doesn't seem to accept a padding value. Firebug shows the table and tbody's layout with padding 0 but doesn't accept any value entered for them, so I guess they just don't have the padding property. But the thing is I want the same separation between cells than the top cells with the table top and the bottom cells with the table's bottom. Again, what I want

css - applying padding to box with scroll, bottom-padding doesn't work

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问题 I can't get bottom-padding to work when I use overflow-y: auto on a box. HTML: <div id="container"> <div id="some_info"></div> </div> CSS: #container { padding: 3em; overflow-x: hidden; overflow-y: auto; width: 300px; height: 300px; background: red; } #some_info { height: 900px; background: #000; } Fiddle: http://jsfiddle.net/rwgZu/ EDIT: I use Firefox 回答1: One more solution without extra DIVs. #container:after { content: ""; display: block; height: 50px; width: 100%; } Working in FF, Chrome,

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