padding | 易学教程

Style the first <td> column of a table differently

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If I have a table with two columns, how do I specify a padding or any other css so that it is applied just for the first column of <td> s. Also how do I style an n-th column similarly? RRikesh You could use the n-th child selector . to target the nth element you could then use: td:nth-child(n) { /* your stuff here */ } (where n starts at 1) If you've to support IE7, a more compatible solution is: /* only the cells with no cell before (aka the first one) */ td { padding-left: 20px; } /* only the cells with at least one cell before (aka all except the first one) */ td + td { padding-left: 0; }

一文搞懂 deconvolution、transposed convolution、sub-pixel or fractional convolution

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一文搞懂 deconvolution、transposed convolution、sub-pixel or fractional convolution 目录写在前面什么是deconvolution convolution过程 transposed convolution过程 transposed convolution的计算整除的情况不整除的情况总结参考博客： blog.shinelee.me | 博客园 | CSDN 写在前面开篇先上图，图为deconvolution在像素级语义分割中的一种应用，直观感觉deconvolution是一个upsampling的过程，像是convolution的对称过程。本文将深入deconvolution的细节，并通过如下方式展开：先回答什么是deconvolution？为什么会有transposed convolutionon、subpixel or fractional convolution这样的名字？再介绍各种情形下 transposed convolution是如何进行的，并提供一种统一的计算方法。什么是deconvolution 首先要明确的是，deconvolution并不是个好名字，因为它存在歧义： deconvolution最初被定义为“inverse of convolution”或者

一文搞懂 deconvolution、transposed convolution、sub-pixel or fractional convolution

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目录写在前面什么是deconvolution convolution过程 transposed convolution过程 transposed convolution的计算整除的情况不整除的情况总结参考博客： blog.shinelee.me | 博客园 | CSDN 写在前面开篇先上图，图为 deconvolution 在像素级语义分割中的一种应用，直观感觉deconvolution是一个upsampling的过程，像是convolution的对称过程。本文将深入deconvolution的细节，并通过如下方式展开：先回答什么是 deconvolution ？为什么会有 transposed convolutionon 、 subpixel or fractional convolution 这样的名字？再介绍各种情形下 transposed convolution 是如何进行的，并提供一种统一的计算方法。什么是deconvolution 首先要明确的是， deconvolution并不是个好名字，因为它存在歧义： deconvolution 最初被定义为“inverse of convolution”或者“inverse filter”或者“解卷积”，是指消除先前滤波作用的方法。比如，我们认为原始图像是清晰的

CSS盒子模型简单小结

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CSS盒子模型简单小结盒子模型（Box Model）各个部分简单说明两种盒子模型两种盒子模型差异指定box-sizing属性盒子模型（Box Model） margin（外边距或空白、空白边） border（边框） padding（内边距或填充） content（内容）或 element（元素）各个部分简单说明 margin:定义元素周围的空间（通俗来讲就是自身边框到另一个容器边框之间的距离） padding：定义元素border与content之间的空间。当padding被清除时，所释放的区域将受到element背景颜色的填充。 border：边框 content：内容部分，显示文本或图像等。两种盒子模型 W3C的标盒模型：包括margin、border、padding、content <style type="text/css"> .box{ width: 100px; height: 100px; border: 1px solid #FF0000; margin: 10px; padding: 10px; } </style> <body> <div class="box"></div> </body> 盒子占据空间=margin+border+padding+content 盒子实际大小=border+padding+content 这里的width

jQuery实例方法 — 位置图形、遍历索引

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位置坐标图形大小相关方法： offset()、position() 原生js的offset是距离最近的有定位的父级的距离，jq的offset就是距离文档的距离。 position是获取有定位的父级的距离 < style > .wrapper { width : 200px ; height : 200px ; background-color : red ; position : absolute ; left : 150px ; top : 150px ; } .demo { width : 50px ; height : 50px ; background-color : orange ; position : absolute ; left : 50px ; top : 50px ; } </ style > < div class = " wrapper " > < div class = " demo " > </ div > </ div > console . log ( $ ( '.demo' ) . offset ( ) ) ; // {top: 200, left: 200} console . log ( $ ( '.demo' ) . position ( ) ) ; // {top: 50, left: 50} scrollTop()、scrollLeft

DOM盒子模型常用属性client，offset和scroll

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JS盒子模型属性在JS中通过相关的属性可以获取(设置)元素的样式信息,这些属性就是盒子模型属性（基本上都是有关于样式的）名称说明 client top/left/width/height offset top/left/width/height/parent scroll top/left/width/height/parent ![] (https://img2018.cnblogs.com/blog/1402448/201909/1402448-20190920170309578-2046550625.png) <div id="outer"> <div id="inner"> <div id="center"></div> </div> </div> clientTop/Left/Width/Height 1.clientWidth & clientHeight：获取当前元素可视区域的宽高（内容的宽高+左右/上下PADDING, 和内容是否有溢出无关（和是否设置了OVERFLOW:HIDDEN也无关），就是我们自己设定的内容的宽高+PADDING 获取当前页面一屏幕(可视区域)的宽度和高度 document.documentElement.clientWidth || document.body.clientWidth document.documentElement

last block incomplete with CipherInputStream/CipherOutputStream, even with padding AES/CBC/PKCS5Padding

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Actually, I searched lot from internet and in stackoverflow too for this, Initially I don't used padding in my encryption and decryption, But Finally I got solution from here https://stackoverflow.com/a/10775577/1115788 and I updated my code with padding as AES/CBC/PKCS5Padding and the same error is coming, and last block is not decrypted... I'm working on this for last two day, but no solution found my Crypter Code: package mani.droid.browsedropbox; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.math.BigInteger;

pad varchar numbers with 0s in db2

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问题 Is there a way to pad 0s before numbers stored as VARCHAR in DB2? Like this: some_column result ----------- ------ 12 ==> 00012 123 ==> 00123 6454 ==> 06454 回答1: If the function LPAD is available: SELECT LPAD(some_column, 5, '0') FROM table Otherwise you can use a combination of RIGHT and REPEAT: SELECT RIGHT(REPEAT('0', 5) || some_column, 5) FROM table some_column | Concatenate five '0's to some_column | Return the five rightmost characters ---------------------------------------------------

Java AES without padding

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What are some of the simplest ways to AES encrypt and decrypt a 16 byte array without the automatic padding? I have found solutions that use external libraries, but I want to avoid that if possible. My current code is SecretKeySpec skeySpec = new SecretKeySpec(getCryptoKeyByteArray(length=16)); // 128 bits Cipher encryptor = Cipher.getInstance("AES"); encryptor.init(Cipher.ENCRYPT_MODE, skeySpec); byte[] encrypted = encryptor.doFinal(plain); How can I prevent the padding? The plain data is always fixed length and includes its own padding. How can I allow plain to be 16 bytes without causing

ffmpeg resize down larger video to fit desired size and add padding

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I'm trying to resize a larger video to fit an area that I have. In order to achieve this I calculate first the dimensions of the resized video so That it fits my area, and then I try to add padding to this video so that the final result will have the desired dimension, keeping the aspect ratio as well. So let's say that I have the original video dimensions of 1280x720 and to fit my area of 405x320 I need first to resize the video to 405x227. I do that. Everything is fine at this point. I do some math and I find out that I have to add 46 pixels of padding at the top and the bottom. So the

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