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for each of the N entities. It's not a problem when it comes to n=10, but when n=100 or n=1000? Then there will certainly be inefficiency problems. Listing 14 shows an example of this pattern.Listing 14. Schema.sqlDROP TABLE IF EXISTS authors;CREATE TABLE Authors (ID mediumint not NULL auto_increment,Name TEXT not NULL,PRIMARY KEY (ID));DROP TABLE IF EXISTS Books;CREATE TABLE Books (ID mediumint not NULL auto_increment,author_id Mediumint not NULL,Name TEXT not NULL,PRIMARY KEY (ID));INSERT int
}); Conversat.io is a voice group chat app. You only need to log in with a browser that supports WEBRTC, set up a chat room, and then you can have a video chat with up to 6 people-no landing, no other services, only video chat. Currently, there are only two browsers that support the WEBRTC component running Conversat.io,chrome and the nightly version of Firefox (you need to go to Firefox about: Config enable media.peerconnection.enabled personalization, in fact no need, default
September 25 News from Beijing time, Linux users today got a "surprise"! The Red Hat security team found a cryptic and dangerous security flaw in a bash shell that is widely used in Linux. The vulnerability is known as "Bash Bug" or "Shellshock".When the user is properly accessed, the vulnerability allows the attacker's code to execute as if it were in the shell, which opens the door for a variety of attacks. And, worse, the vulnerability has been aro
Configuration VPN server Deploy your CV on GitHub pages Implement team Coding Review process with Githook Create a personal Hexo blog based on Seven Qiniu LVS Cluster Load Balancing combat Phase 4: Script programming Advanced Bash Scripting Programming Guide Regular Expression Basics Ansible Basic Tutorials Shell Typing game Phase 5: System Monitoring and security Linux Firewall Technology Shellsho
question is beginning to form in everyone's mind. Upgrade, or freshly install. It's always an interesting discussion to have with fellow Linux users, because there seems to be an almost religious divide between the two camps. some feel that to really get the full experience of a new version, a clean install is the only way. the other side, however, argues that the Apt package management makes upgrading so simple and complete, that it's silly to reinstall. let's take a quick look some advantages
Modernizr This JS, in the foreign theme inside a lot of places are seen, just remember is for the HTML supplement, a bit similar to responsive.js. Search this article today, in-depth explanation of modernizr.js is to detect the browser's CSS3 and HTML5 properties, and thus through the CSS to solve the compatibility problem. Personally think this practice significantly increased the amount of CSS code, and may cause when the user's page is not enabled JS, the inside of the CSS3 effect can not be
to code confusion and cause unexpected side effects on attribute values. Not recommended width:100px;margin:0 auto; Recommendation width:100px;margin-right:auto;margin-left:auto;The Unit after 0 is omitted. Do not use units after 0 values. Not recommended padding-bottom: 0px;margin: 0em; Recommendation padding-bottom: 0;margin: 0;Color value in hexadecimal notation The color values in css can be expressed in hexadecimal notation. If possible, they can be abbreviated, for example:#fff,#000.Use o
support CSS, a common practice is to use the @import technique to hide the CSS. For example:@import url ("Main.css");However, this method does not work for IE4, which gives me a headache for a while. Then I used the following notation:@import "Main.css";This can also hide the CSS in the IE4, hehe, but also save 5 bytes of it. For a detailed explanation of the @import syntax, you can see the centricle's CSS filter chart here.16, for the optimization of IESometimes, you need to define some specia
Original link: http://caibaojian.com/modernizr-js.htmlModernizr this JS, in the foreign theme inside a lot of places are seen, just remember is for the HTML supplement, a bit similar with responsive. JS the same. Search this article today, in-depth explanation of modernizr.js is to detect the browser's CSS3 and HTML5 properties, and thus through the CSS to solve the compatibility problem. Personally think this practice significantly increased the amount of CSS code, and may cause when the user'
Original link: http://caibaojian.com/modernizr-js.htmlModernizr this JS, in the foreign theme inside a lot of places are seen, just remember is for the HTML supplement, a bit similar with responsive. JS the same. Search this article today, in-depth explanation of modernizr.js is to detect the browser's CSS3 and HTML5 properties, and thus through the CSS to solve the compatibility problem. Personally think this practice significantly increased the amount of CSS code, and may cause when the user'
examples in the book are updated based on the new version of Android. And the improvement was made according to the reader feedback. In addition to supporting a wide range of screen resolutions and Android best practices, the Android Essentials Tutorial (3rd edition) also describes multi-touch and live wallpaper programming interface features.3. Android Hacker ' s HandbookHttp://www.topitbooks.com/android-hackers-handbook-1113.htmlEnglish version, very clear, want to see the security mechanism
examples in the book are updated based on the new version of Android. And the improvement was made according to the reader feedback. In addition to supporting a wide range of screen resolutions and Android best practices, the Android Essentials Tutorial (3rd edition) also describes multi-touch and live wallpaper programming interface features.3. Android Hacker ' s HandbookHttp://www.topitbooks.com/android-hackers-handbook-1113.htmlEnglish version, very clear, want to see the security mechanism
version does not support CSS, a common practice is to use the @ import technique to hide CSS. For example:@ Import url(main.css );However, this method does not work for ie4, which makes me a headache for a while. Later I used the following statement:@ Import main.css;In this way, CSS can be hidden in ie4, and 5 bytes are saved. For more information about @ import syntax, see centricle's CSS Filter chart.16. Optimization for IESometimes, you need to define some special rules for IE browser bugs.
of accessible web design Canadian Election web sites flunk Standards Test (Joe Clark: Media Access) Cascading Style Sheets, level 1 Cascading Style Sheets, level 2 Centricle: CSS filters (CSS hacks) Clearing a float container without source Markup Client-side table sorting Closures and executing JavaScript on page load-sitepoint DHTML CSS blog Collylogic: ticked off? Visited links how- Color Scheme Consistent list indentation Containing f
login name to be cracked, passfile is the password dictionary library, and SMB operating system logon password cracking Freexploit: allyesno Postscript:1. the Hydra dictionary refers to the 9-headed snake. 2. The translation below is not very good. Can someone help me correct it?Options you will never see in Hydra-----------------------------------In this section I put feature request which I will never implementHydra-and why.? Feeding login/passwords from stdin (e.g. From John)# This will not
Http://www.alistapart.com/articl... ss3-with-modernizr/ Http://www.osmn00.com/translation/221.html () -------------------- Split line, the following is the body -------------------- 10 years ago, only the most cutting-edge website designers used CSS for the layout and decoration of webpages. At that time, the support of the browser for CSS layout was incomplete and full of loopholes, so these people insisted on Web standardization while at the same time, ha
; Text-align: left; } Text-align: center of the first body. The rule defines that all the elements of the body in ie5/win are centered (other browsers only center the text), and the second text-align: left; is to place the text in # warp to the left.15. Import and hide CSS Because the browser of the old version does not support CSS, a common practice is to use the @ import technique to hide CSS. For example: @ Import url(main.css ); However, this method does not work for ie4, which makes me a he
Whether you're a college student, A middle-aged networking guru or a wife and mother fascinated by the world of online games-Everyone occasionally comes guest ss a situation where some form of hacking wocould make life a whole lot easier. Maybe you 've lost the license that came with your legitimate software package that you paid. maybe you want to make a backup copy of your favorite DVD movie, but there's copy-protection encoded onto the disk. or maybe you're just stuck on a popular online ga
(main.css ); However, this method does not work for ie4, which makes me a headache for a while. Later I used the following statement: @ Import main.css; In this way, CSS can be hidden in ie4, and 5 bytes are saved. 16. Optimization for IE Sometimes, you need to define some special rules for IE browser bugs. Here there are too many CSS skills (Hacks). I only use either of them, whether Microsoft is better able to support CSS in the upco
;} Text-align: center of the first body. The rule defines that all the elements of the body in ie5/win are centered (other browsers only center the text), and the second text-align: left; is to place the text in # warp to the left. 15. Import and hide CSSBecause the browser of the old version does not support CSS, a common practice is to use the @ import technique to hide CSS. For example: @ Import url(main.css ); However, this method does not work for ie4, which makes me a headache for a wh
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