Here

如何将<div>与页面的中间(水平/宽度)对齐[重复]

点点圈 提交于 2020-08-10 23:44:25
问题: This question already has an answer here: 这个问题在这里已有答案: How to horizontally center a <div>? 如何水平居中<div>? 101 answers 101个答案 I have a div tag with width set to 800 pixels . 我有一个 width 设置为 800像素 的 div 标签。 When the browser width is greater than 800 pixels , it shouldn't stretch the div , but it should bring it to the middle of the page. 当浏览器宽度大于 800像素时 ,它不应该拉伸 div ,但它应该将它带到页面的中间。 解决方案: 参考一: https://stackoom.com/question/409m/如何将-div-与页面的中间-水平-宽度-对齐-重复 参考二: https://oldbug.net/q/409m/How-to-align-a-div-to-the-middle-horizontally-width-of-the-page-duplicate 来源: oschina 链接: https://my.oschina.net

夏令时和时区最佳实践

谁都会走 提交于 2020-08-10 22:05:41
问题: I am hoping to make this question and the answers to it the definitive guide to dealing with daylight saving time, in particular for dealing with the actual change overs. 我希望使这个问题及其答案成为处理夏时制(尤其是处理实际变更)的权威指南。 If you have anything to add, please do 如果您要添加任何内容,请执行 Many systems are dependent on keeping accurate time, the problem is with changes to time due to daylight savings - moving the clock forward or backwards. 许多系统都依赖于保持准确的时间,问题在于夏时制导致的时间变化-向前或向后移动时钟。 For instance, one has business rules in an order taking system that depend on the time of the order - if the clock changes, the rules

为什么++ [[]] [+ []] + [+ []]返回字符串“ 10”?

本小妞迷上赌 提交于 2020-08-10 19:10:55
问题: This is valid and returns the string "10" in JavaScript ( more examples here ): 这是有效的,并在JavaScript中返回字符串 "10" ( 此处有更多示例 ): console.log(++[[]][+[]]+[+[]]) Why? 为什么? What is happening here? 这是怎么回事 解决方案: 参考一: https://stackoom.com/question/UDbp/为什么-返回字符串 参考二: https://oldbug.net/q/UDbp/Why-does-return-the-string-10 来源: oschina 链接: https://my.oschina.net/u/3797416/blog/4302115

日期中带的 T 是什么意思

余生长醉 提交于 2020-08-10 18:43:44
Date and Time Formats Submitted to W3C 15 September 1997 This version: http://www.w3.org/TR/1998/NOTE-datetime-19980827 Newest version: http://www.w3.org/TR/NOTE-datetime Authors: Misha Wolf < misha.wolf@reuters.com > Charles Wicksteed < charles.wicksteed@reuters.com > Document Status Status of this document This document is a NOTE made available by the W3 Consortium for discussion only. This indicates no endorsement of its content, nor that the Consortium has, is, or will be allocating any resources to the issues addressed by the NOTE. This document is a submission to W3C from Reuters Limited

Linux重定向用法详解

若如初见. 提交于 2020-08-10 18:29:49
大家好,我是良许。 相信大家平时都会有需要复制粘贴数据的时候,如果是打开文件进行复制粘贴,就不可避免的需要较多的鼠标与键盘的操作,就会比较繁琐。那么有没有可以省掉这些繁琐操作的复制粘贴的方法呢? 答案是肯定的,那就是重定向。重定向是一种高效的方法,无需大量的鼠标与键盘操作就可以完成数据的转移。重定向可以分为输入重定向以及输出重定向这两种类型。由于所有程序都有输入或者输出,因此输入和输出的重定向是任何编程语言或脚本语言都自带的功能。 每当你与计算机交互时,重定向就必然会发生。学会使用重定向,不仅可以让你与计算机更好地交互,还可以提高你的工作效率,因此,请让良许为你讲解 Linux 系统中重定向的常见用法: Linux 中的数据流 谈到 Linux 的重定向,就不得不提以下这3种数据流: 输入信息会从 stdin 中读取(标准输入,通常是键盘或鼠标)。 输出信息会被输出到 stdout (标准输出,一个文本文件或者数据流)。 错误信息会被输出到 stderr 。 了解了这些数据流的存在,在你使用 Shell 时,你就可以更好地控制数据的流向了。 在 Linux 系统中,标准输入,标准输出以及标准错误都作为文件存在。 你可以在 /dev 目录下看到它们: $ ls /dev/std* /dev/stderr /dev/stdin /dev/stdout 重定向输出 在 Linux 系统中

如何在JavaScript / jQuery中查找数组是否包含特定字符串? [重复]

▼魔方 西西 提交于 2020-08-10 18:27:08
问题: This question already has an answer here: 这个问题已经在这里有了答案: How do I check if an array includes a value in JavaScript? 如何检查数组是否在JavaScript中包含值? 47 answers 47个答案 Can someone tell me how to detect if "specialword" appears in an array? 有人可以告诉我如何检测 "specialword" 出现在数组中吗? Example: 例: categories: [ "specialword" "word1" "word2" ] 解决方案: 参考一: https://stackoom.com/question/PfAo/如何在JavaScript-jQuery中查找数组是否包含特定字符串-重复 参考二: https://oldbug.net/q/PfAo/How-to-find-if-an-array-contains-a-specific-string-in-JavaScript-jQuery-duplicate 来源: oschina 链接: https://my.oschina.net/u/4432649/blog/4422384

0312. Burst Balloons (H)

非 Y 不嫁゛ 提交于 2020-08-10 17:07:11
Burst Balloons (H) 题目 Given n balloons, indexed from 0 to n-1 . Each balloon is painted with a number on it represented by array nums . You are asked to burst all the balloons. If the you burst balloon i you will get nums[left] * nums[i] * nums[right] coins. Here left and right are adjacent indices of i . After the burst, the left and right then becomes adjacent. Find the maximum coins you can collect by bursting the balloons wisely. Note: You may imagine nums[-1] = nums[n] = 1 . They are not real therefore you can not burst them. 0 ≤ n ≤ 500, 0 ≤ nums[i] ≤ 100 Example: Input: [3,1,5,8] Output

大多数Web浏览器中都可以使用PUT,DELETE,HEAD等方法吗?

三世轮回 提交于 2020-08-10 17:00:19
问题: I've seen a couple questions around here like How to debug RESTful services , which mentions: 我在这里看到了几个问题,例如 如何调试RESTful服务 ,其中提到: Unfortunately that same browser won't allow me to test HTTP PUT, DELETE, and to a certain degree even HTTP POST. 不幸的是,同一浏览器不允许我测试HTTP PUT,DELETE,并且在某种程度上甚至无法测试HTTP POST。 I've also heard that browsers support only GET and POST, from some other sources like: 我还听说其他一些来源的浏览器仅支持GET和POST: http://www.packetizer.com/ws/rest.html http://www.packetizer.com/ws/rest.html http://www.mail-archive.com/jmeter-user@jakarta.apache.org/msg13518.html http://www.mail-archive.com

vpp系列8-常用命令

不问归期 提交于 2020-08-10 16:18:01
VPP常用命令 all see here set interface set interface ip address set interface ip address [del] <interface> <ip-addr>/<mask> | [all] example usage # 设置接口ipv4地址 vpp# set interface ip address eth0 172.16.2.12/24 # 简写 vpp# set int ip addr eth0 172.16.2.12/24 # 删除接口ipv4地址 vpp# set interface ip address del eth0 172.16.2.12/24 # 删除接口ipv4 and ipv6 vpp# set interface ip address del eth0 all set interface l2 bridge set interface l2 bridge <interface> <bridge-domain-id> [bvi|uu-fwd] [shg] example usage vpp# set interface l2 bridge GigabitEthernet0/8/0.200 200 vpp# set interface l2 bridge GigabitEthernet0/9/0

如何检查变量是否是JavaScript中的数组? [重复]

岁酱吖の 提交于 2020-08-10 15:45:18
问题: This question already has an answer here: 这个问题在这里已有答案: How to check if an object is an array? 如何检查对象是否是数组? 46 answers 46个答案 I would like to check whether a variable is either an array or a single value in JavaScript. 我想检查变量是JavaScript中的数组还是单个值。 I have found a possible solution... 我找到了一个可能的解决方案...... if (variable.constructor == Array)... Is this the best way this can be done? 这是最好的办法吗? 解决方案: 参考一: https://stackoom.com/question/3Deo/如何检查变量是否是JavaScript中的数组-重复 参考二: https://oldbug.net/q/3Deo/How-do-you-check-if-a-variable-is-an-array-in-JavaScript-duplicate 来源: oschina 链接: https://my.oschina