padding | 易学教程

When are pad bytes copied - struct assignment, pass by value, other?

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问题 While debugging a problem, the following issue came up. (Please ignore minor code errors; the code is just for illustration.) The following struct is defined: typedef struct box_t { uint32_t x; uint16_t y; } box_t; Instances of this struct are being passed by value from function to function (obviously simplified): void fun_a(box_t b) { ... use b ... } void fun_b(box_t bb) { // pass bb by value int err = funa(bb); } void fun_c(void) { box_t real_b; box_t some_b[10]; ... ... use real_b and some

关于盒模型的盒子模型、浮动、定位以及高级选择器的使用

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盒模型的基本组成包括：外边距（margin）内边距(padding) 边框（border）元素(element,content) 当上下相邻的两个块元素相遇时，如果上面的元素有下外边距margin-bottom，下面的元素有上外边距margin-top，则他们之间的垂直间距不是margin-bottom与margin-top之和，而是两者中的较大者。这种现象被称为相邻块元素垂直外边距的合并（对于两个嵌套关系的块元素，如果父元素没有上内边距及边框，则父元素的上外边距会与子元素的上外边距发生合并，合并后的外边距为两者中的较大者，即使父元素的上外边距为0，也会发生合并。都会合并成父元素的外边距，内盒子与大盒子之间不显示小盒子的外边距。解决方案：可以为父元素定义 1px的上边框。可以为父元素定义 1px上内边距。可以为父元素添加 overflow: hidden box-sizing: content-box 盒子大小为 width + padding + border content-box:此值为其默认值，其让元素维持W3C的标准Box Mode box-sizing: border-box 盒子大小为 width 就是说 padding 和 border 是包含到width里面的注：上面的标注的width指的是CSS属性里设置的width: length

Weather with you主题说明

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使用前请确保拥有js权限！！！源代码： css： /*广告去死*/ #ad_t2 { display: none !important; } #i-amphtml-fill-content { display: none !important; } #i-amphtml-replaced-content { display: none !important; } #i-amphtml-replaced-content { display: none !important; } #img_ad { display: none !important; } /************************************************** 第一部分：所有的模板都使用的公共样式。公告样式是为了更好的向前和向后兼容。如果不符合你皮肤的要求，你可以在后面通过更高的优先级覆盖着这些样式，但是你不能删除这些样式。 **************************************************/ #EntryTag { margin-top: 20px; font-size: 9pt; color: gray; } .topicListFooter { text-align: right; margin-right: 10px; margin-top:

css 笔记整理

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html是什么 html（Hypertext Markup Language）—— 结构超文本标记标签 <> 标签对单标签在标签中间—— 标签名语言 css 凡是写在标签名后面的都是标签的属性可以自动刷新浏览器属性名称 = “属性值” border  border 区域会不会显示背景图(会显示) < style > .box { width : 300 px ; height : 200 px ; border : 10 px d #0c0c0c ; background : url( "img/14.jpg" ) repeat-y ; margin : 40 px 30 px 20 px 10 px ; } </ style > </ head > < body > < div class = "box" > </ div > </ body > border-color 边框颜色 border-style 边框样式 border-width 边框宽度 border -top border -top -color border -top -style border

CSS背景图片padding的疑惑

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CSS中background属性添加了图片或者背景颜色，这个背景图片或者背景颜色会为所设置的padding和width同时添加。如果图片比较小就会以左上角为原点放置·这个大家都知道的。研究了好几天了终于搞懂CSS的和模型了，总有些细节问题能把人挡住，还是实践出真知！加油！CSS！来源： CSDN 作者： crz2020 链接： https://blog.csdn.net/crz2020/article/details/6125037

HTML / CSS : Reset List Padding to Default

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问题 I'm using *{margin:0; padding:0;} and this is the first time that it breaks me in something. List paddings and margins are 0 too, so the indentation is lost. and I would like to reset them to their original state, how is this possible? I've tried this with no success: ul,ol{ margin :auto; /* This Works */ padding:auto; /* This Not :( */ } So how should I fix this? 回答1: The point of a reset is to eliminate variations due to browser defaults. In other words, there is no definitive way to

[ bootstrap ] 图片内容占用padding的范围，如何解决？

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问题描述：从效果图看到，图片内容占据了padding的范围，怎么解决呢？ html代码 <div class="container"> <div class="row">  <div class="col-sm-3">  <div class="row"> <div class='avatar'> <img src="../assets/avatar.png" alt="" class="rounded img-fluid w-100" > </div> <p>按钮</p> </div> </div> </div> </div> 效果来源： https://www.cnblogs.com/remly/p/12005135.html

Removing padding from UDP packets in python (Linux)

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问题 I am trying to remove null padding from UDP packets sent from a Linux computer. Currently it pads the size of the packet to 60 bytes . I am constructing a raw socket using AF_PACKET and SOCK_RAW . I created everything from the ethernet frame header, ip header (in which I specify a packet size of less than 60) and the udp packet itself. I send over a local network and the observed packet in wireshark has null padding. Any advice on how to overcome this issue? 回答1: This is pretty much

Appending spaces with str_pad

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问题 I'm trying to print the contents of an array to the screen, but nicely indented: function fu($var){ $lengths = array_map('strlen', array_keys($var)); $longest = max($lengths); echo '<pre>'; foreach($var as $key => $value){ echo str_pad($key, $longest - strlen($key)).' => '.$value."\n"; } echo '</pre>'; } fu(array( 'foo' => 5, 'foooooooooo' => 'xxx', 'abc' => 5454545, '1234567890' => 34, 4352354 => 435, 'a' => 'x', )); For some reason I don't get my output correctly indented. It should add

How to perform unpadding after decryption of stream using CryptoPP

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问题 I've got the stream to decrypt. I divide it into blocks and pass each block to the method below. The data I need to decrypt is encrypted by 16 - bytes blocks and if the last block is less than 16, then all the rest bytes are filled by padding. Then in the moment of decryption I'm getting my last block result as the value including these additional padding bytes. How can I determine the length of original data and return only it or determine the padding bytes and remove them, considering