practical common lisp

, it is particularly suitable for search-type network services. The typical upstream speed of ADSL is 1.544-8.192 kbps, the downstream speed is 6 km-Mbps, and the transmission distance is 3-. ADSL is a standard transmission service. The ADSL Broadband Access Network Technology can share the same user line with the phone service. In actual application, there is a problem with the line selection rate of ADSL. Generally, the line selection rate is about 10%. In addition, the rate of ADSL decreases

Practical Manual: over 130 common Vim commands to improve development efficiency Vim is a text editor developed from vi. Code Completion, compilation, error jump, and other convenient programming functions are particularly rich and widely used by programmers. It is used in parallel with Emacs to become your favorite editor for Unix-like systems. The vim commands required by more than 130 programmers are inc

collect some common JavaScript regular expression matching rules, such as matching phone number, Email, Chinese characters, social Security number, postal code, QQ number, filter blank line, match specific numbers, etc. Think this thing is very useful, but their own level of food, always do not write their own, read this document, feel a lot of practical, use the regular match, look at this, I believe to le

UnavailablThe difference between 2.Get and POST request modesGet is a form value passed through a URL, and the form value that is passed by post is implicit in the HTTP message, which is not visible in the URL.Get request format for passing data by URLThe file name requested in the URL followed by "? ", and then add the message to be uploaded key and value valuesMultiple sets of key-value pairs, with "" between key-value pairsThe URL contains Chinese characters, special symbols, which need to b

Linux Command Line editing common shortcut keys (practical, General), linux Command Line This article describes common shortcut keys for Linux Command Line editing. Linux Command Line editing shortcut: History display command history list ← (Ctrl + p) display the previous command Hide (Ctrl + n) display the next command ! Num: The num command in the History list.

This article imitates the universal class that implements database access, the code is clear and practical, including all the common operations on the database. If we set up a common class that accesses the database, and when we do it with the database, we just need to instantiate the object and then call the appropriate method to do all the operation

Article Title: Practical SSH skills and instructions for using common commands. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Commands available for SFTP CD change Directory LS to list objects MKDIR RMDIR PWD CHGRP CHOWN CHMOD LN oldna em NEWNAME RM PATH RENAME OLDNAME

Common PHP function libraries and some practical tips. File read function functionPHP_Read ($ file_name) {$ fdfopen ($ file_name, r); while ($ buflinefgets ($ fd, 4096) {$ buf. $ bufline;} fclose ($ fd); return $ buf ;}? Text File read function // File read function Function PHP_Read ($ file_name ){ $ Fd = fopen ($ file_name, r ); While ($ bufline = fgets ($ fd, 4096 )){ $ Buf. = $ bufline; } Fclose ($ fd

same way of thinking, showing the modification of the controller's wording.Public Function editproduct () {$id = I (' id ');$Model = M (' product ');If (is_post) {$data = Array (' id ' = $id,' name ' + = I (' name '),' Price ' = I (' price '),......' Addtime ' =>time ());$result = $Model->save (' data ');If ($result) {Success (' modified success ', U (' product_list '));}else{Error (' Add failed ', U (' editproduct ', array (' id ' = = $id));}}else{$this->info = $Model->find ($id);$this->displa

($items); # outputs: # ( # [0] => Apples # [1] => apples # [2] => 5 apples # [ 3] natsort ($items) => apples); Print_r ($items); # outputs: # ( # [2] => 5 apples # [3] => apples # [0] => apples # [ 1] => Apples #) 9. Levenshtein () Levenshtein () tells you the "distance" between two words. It tells you how many letters you need to insert, replace, and delete if you want to turn a word into another word. Let's look at an example: $dictionary = Array

xianlin ' let hallalloffamearr = Str.split (', ') Console.log (Hallalloffamearr) //["Chen Yin-chen", "Lu Xun", "Qian Zhongshu", "Hu Shi", "Wang Guowei", "Liang Qichao", "WU", "Ji Xianlin"] 2, into a two-dimensional array String.prototype.removeBlankLines = function () {return this.replace (/(\n[\s\t]*\r*\n)/g, ' \ n '). Replace (/^[\n\r \n\t]*| [\n\r\n\t]*$/g, '] } String.prototype.strTo2dArr = function (Firstsplit, secondsplit) { var contentstr = This.removeblanklines (), Contents

this list, SEO work will not be successful. I believe you are in this industry, see a lot of SEO technology-related articles, of course, these articles are entirely from earlier in the SEO industry experience accumulated by the predecessors. If you do not know the creative, is completely according to the ideas of the predecessors to do, then sooner or later is finished. For Baidu search engine, when you search for SEO, a friendly tip, you can wake up, "SEO is a very need to work" a simple words

Practical palm of Bao--htmlcss common label Quick Search Manual Content recommendation: The first book in the form of syntax and examples, the details of the HTML language elements and their attributes of the role, grammar and display effect; the second one starts with the basic concept of CSS and explains the basics of CSS, CSS controls the way the various elements are displayed and the skills of CSS layou

PHP common error hint meaning explanation (practical!) Worth collecting), error tips worth collecting This article explains the meaning of common PHP error hints. Share to everyone for your reference, as follows: In the learning of PHP, often encountered a variety of error hints, today see this error hints and explanations feel very good, now turn around, for us

Common MYSQL commands and practical skills Common MYSQL commands and practical skills 1. Connect to MYSQL. Format: mysql-h host address-u user name-p User Password 1. Example 1: connect to MYSQL on the local machine. First, open the DOS window, enter the directory mysqlbin, then type the command mysql-uroot-p, an

, BasePage class processing mode Rewrite the onerror event in the common base class of the page. In the front of this "asp.net implement very practical custom page base class", the building pig has pasted the code, no longer trouble. According to experience, many people write almost all the time, and it is helpful for debugging and maintenance. It should be explained that each new page, its corresponding c

workspace unchanged $ git reset [file] # Reset staging area with workspace, consistent with last commit $ git reset--hard # Resets the current branch pointer to the specified commit, same as Reset the staging area, but the workspace does not change the $ git reset [commit] # Resets the current branch's head to the specified commit, while resetting the staging area and workspace, consistent with the specified commit $ git reset--hard [commit] # Resets the current head to refer to Commit, but kee

Int64 (Time * Double (nsec_per_sec)))4Dispatch_ After (delay, dispatch_get_main_queue ()) {5 println ("output after 2 seconds " )6 }Wrap it up.1 Import Foundation2 3Typealias Task = (cancel:bool) ()4 5Func Delay (Time:nstimeinterval, Task: ()), task? {6 7Func Dispatch_later (Block: ()()) {8 Dispatch_after (9 Dispatch_time (Ten Dispatch_time_now, OneInt64 (Time *Double (NSEC_PER_SEC))), A dispatch_get_main_queue (), - block) - } the -var closure:dispatch_block_t

$ git Checko UT. # resets the specified file for staging area, consistent with the last commit, but the workspace is unchanged $ git reset [file]# resets staging area with the workspace, consistent with last commit $ git reset--hard# resets the current branch pointer to the specified commit, while resetting staging area, the workspace does not change $ git reset [commit]# resets the current branch's head for the specified commit, while resetting the staging area and workspace, consistent with t

1. Javascript returns to previous page History.go (-1), returns two pages: History.go (-2);2. History.back ().3. Window.history.forward () return to next page4. Window.history.go (return to page or use the URL you have visited)Cases:Response. Write ("")Response. Write ("")Page Jump: onclick= "window.location.href= ' list.aspx '"P.S.Small tricks (JS reference js):JavaScript refreshes the page in several ways:1 history.go (0)2 Location.reload ()3 location=location4 Location.assign (location)5 Docu