padding | 易学教程

JQuery特殊属性操作、事件机制（3）

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1. jQuery特殊属性操作 1.1. val方法 val方法用于设置和获取表单元素的值，例如input、textarea的值 //设置值 $("#name").val(“张三”); //获取值 $("#name").val(); 1.2. html方法与text方法 html方法相当于innerHTML text方法相当于innerText //设置内容 $(“div”).html(“<span>这是一段内容</span>”); //获取内容 $(“div”).html() //设置内容 $(“div”).text(“<span>这是一段内容</span>”); //获取内容 $(“div”).text() 区别：html方法会识别html标签，text方法会那内容直接当成字符串，并不会识别html标签。 1.3. width方法与height方法设置或者获取高度 //带参数表示设置高度 $(“img”).height(200); //不带参数获取高度 $(“img”).height(); 获取网页的可视区宽高 //获取可视区宽度 $(window).width(); //获取可视区高度 $(window).height(); 1.4. scrollTop与scrollLeft 设置或者获取垂直滚动条的位置 //获取页面被卷曲的高度 $(window).scrollTop()

PostgreSQL adds trailing zeros to numeric

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问题 Recently I migrated a DB to PostgreSQL that has some columns defined as numeric(9,3) and numeric(9,4) . In testing the app I have found that when data is saved to these columns there are trailing zeros being added to the value inserted. I am using Hibernate, and my logs show the correct values being built for the prepared statements. An example of the data I am inserting is 0.75 in the numeric(9,3) column and the value stored is 0.750 . Another example for the numeric(9,4) column: I insert

*{ box-sizing: border-box }

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问题 *{ box-sizing: border-box; } Is this a good idea? Any drawbacks? I find this very useful when I want an element to have 100% and some inner padding. Because I don't have to add another element inside for the padding :/ 回答1: I have started to use this almost always. The Pros , You do not need to calculate out the CSS box-model anymore. You can easily add large padding to an object without have to re-fix your height/width Faster coding of your css (look up SASS if you have not) The cons , IE7

How can I zero just the padding bytes of a class?

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问题 I want to set the padding bytes of a class to 0, since I am saving/loading/comparing/hashing instances at a byte level, and garbage-initialised padding introduces non-determinism in each of those operations. I know that this will achieve what I want (for trivially copyable types): struct Example { Example(char a_, int b_) { memset(this, 0, sizeof(*this)); a = a_; b = b_; } char a; int b; }; I don't like doing that though, for two reasons: I like constructor initialiser lists, and I know that

目标检测论文：SSD: Single Shot MultiBox Detector及其PyTorch实现

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SSD: Single Shot MultiBox Detector 论文链接: https://arxiv.org/pdf/1512.02325.pdf Pytorch代码： https://github.com/shanglianlm0525/PyTorch-Networks Pytorch代码： import torch import torch.nn as nn import torchvision import cv2 def Conv3x3BNReLU(in_channels,out_channels,stride,padding=1): return nn.Sequential( nn.Conv2d(in_channels=in_channels, out_channels=out_channels, kernel_size=3, stride=stride, padding=padding), nn.BatchNorm2d(out_channels), nn.ReLU6(inplace=True) ) def Conv3x3ReLU(in_channels,out_channels,stride,padding=1): return nn.Sequential( nn.Conv2d(in_channels=in_channels, out_channels=out

Set Map Bounds with different padding

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问题 I want to know if ther is any way of set different padding from each site of the Device for Google maps bounds. Because I have an mpview witch match the whole activity, but I have a MapOverlay (some Text inside a linerar Layout with non transulent background) on the bottom 1/3 off the screen. And now i want to zoom in by using map bounds. But it should have more padding from the bottom so it didn't get behind my mapOverlay. I use this code with the padding of 120. final com.google.android.gms

第七讲：用户界面 View（三）

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5、表格布局 TableLayout 表格布局TableLayout以行列的形式管理子元素，每一行是一个TableRow布局对象，当然也可以是普通的View对象，TableRow离每放一个元素就是一列，总列数由列数最多的那一行决定。我们看一个例子： <?xml version=”1.0″ encoding=”utf-8″?> <TableLayout android:id=”@+id/TableLayout01″ android:layout_width=”fill_parent” android:layout_height=”fill_parent” android:stretchColumns=”0″ xmlns:android=” http://schemas.android.com/apk/res/android” > <TableRow android:layout_width=”fill_parent” android:layout_height=”20dip”> <TextView android:text=”色彩透明度测试” android:textSize=”18dip” android:layout_span=”2″ 合并两列 android:layout_gravity=”center” android:layout_width=”fill_parent”

Table padding not working

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问题 I have a table that sits within a parent div full of body text and other content. I have the following CSS which does not seem to work: table {width:100%; padding: 0 50px 0 50px;} When I use margins instead of padding, it works—however, with width:100%, using margins scoots the whole thing out of the parent div. I guess I could reduce the width or specify an exact pixel amount, but the rest of the site scales with screen size and I'd like this to work like that, too. 回答1: There are some

超级人脉开发

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　　分享、交流、学习　　【python测试开发栈】python内存管理机制（一）—引用计数　　超级人脉开发软件找李生：I9I-电5743.威O739电微同号，超级人脉软件开发，超级人脉模式开发，超级人脉互助系统，超级人脉裂变平台开发，超级人脉系统开发~ 　　<meta http-equiv="Content-Type"content="text/html;charset=gb2312"> 　　<base href=" https://blog.51cto.com/14253129/2454499"&gt ; 　　<style> 　　body{position:relative} 　　body,form{margin:0!important;padding:0!important} 　　#bd_snap{font:13px arial;color:#000;background:#fff;text-align:left;padding:13px 0 0 20px} 　　#bd_snap_txt{clear:both;padding:10px 0 2px;line-height:24px;color:#333} 　　#bd_snap_note{color:#999;padding-bottom:10px} 　　#bd_snap a{font:13px arial;color:

弹框

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<!DOCTYPE html> <head> <meta charset="utf-8"> <title>js confirm弹出框自定义样式</title> <style> html,body { margin: 0; padding: 0; font-family: "Microsoft YaHei"; } .wrap-dialog { position: fixed; top: 0; left: 0; width: 100%; height: 100%; font-size: 16px; text-align: center; background-color: rgba(0, 0, 0, .4); z-index: 999; } .dialog { position: relative; margin: 15% auto; width: 300px; background-color: #FFFFFF; } .dialog .dialog-header { height: 20px; padding: 10px; background-color: lightskyblue; } .dialog .dialog-body { height: 30px; padding: 20px; } .dialog .dialog-footer { padding: 8px;