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  How to check why Vim is slow

On *nix, some processes may not be able to start up, software runs very slowly suddenly and software's "Segment Fault" are some issues faced by many *nix users. Here we show you how to use truss to trace why Vim becomes slow suddenly. Operating system : FreeBSD-5.2.1-releas vim version is 6.2.154, after typing vim on command line, sometimes we need to wait for a few minutes to get into the edit interface and there is no error output. After carefully checking .vimrc and all vim settings, there ar...

   vim, truss, linux     2012-11-26 11:54:35

  The basics of Client/Server socket programming

  While Client/Server communication model is ubiquitous nowadays, most of them involve socket programming knowledge. In this post, I will introduce some rudimentary aspects of it: (1) Short/Long-lived TCP connection.Short-lived TCP connection refers to following pattern: Client creates a connection to server; send message, then close the connection. If Client wants to transmit information again, repeat the above steps. Because establishing and destroying TCP s...

       2017-09-26 19:43:10

  The Evolution of a Programmer

High School/Jr.High 10 PRINT "HELLO WORLD" 20 END First year in College program Hello(input, output) begin writeln('Hello World') end. Senior year in College (defun hello (print (cons 'Hello (list 'World)))) New professional #include <stdio.h> void main(void) { char *message[] = {"Hello ", "World"}; int i; for(i = 0; i < 2; ++i) printf("%s", message[i]); printf("\n"); } Seasoned professional #include <iostream....

   Humour,Evolution,Programmer     2012-04-23 06:30:33

  Some measures for improving Linux server security

The hackers often exploit server weakness to gain access control to some servers. With a scanner, aimlessly looking undefended host, backdoor, control, and sold to people in need. Some basic security measures can be taken on Linux servers to avoid being attacked by hackers. Disable root remote login As the default administrative account, root is the account which is most likely to be attacked.Disabling ssh remote login is necessary. Method: Edit / etc / ssh / sshd_config PermitRootLogin no At t...

   Linux server,Server security     2012-08-21 05:08:50

  jQuery 2.0 gives up IE 6/7/8

jQuery 2.0 is released after 10 months development. jQuery 2.0 is customized for modern web browsers and also considers about mobile devices. But one big change is that jQuery 2.0 will not be  compatible with old versions of IE and its size is 10% less than the version 1.9.1. The execution efficiency is higher as well. jQuery 1.9.x will still be maintained by jQuery team, they will also provide update for it. Those websites which want to be compatible with all browsers should not upgrade to...

   jQuery 2.0,IE support     2013-04-20 07:58:16

  Net Neutrality is Dead - and Web Development Will Never Be The Same Again

Against the wishes of web users and tech businesses alike, the FCC has pushed through regulations to kill net neutrality. Here’s what that means for web developers. On December 14, 2017, the FCC voted in a 3-2 decision to roll back the Obama administration’s 2015 net neutrality rules. These policies, which demanded stronger oversight for broadband companies and internet service providers, ensured that all data on the web was treated equally. Most importantly, they prevented web traf...

       2019-05-02 21:55:53

  JavaScript programming style

Douglas Crockford is a JavaScript expert, he is the inventor of JSON. In November 2011 he made a speech "Youtube", during the speech he talked about what JavaScript programming style is.I recommend this speech to everyone, it not only helps you learn JavaScript but also make you enjoying because Crockford is very humorous and he made audience laugh frequently.Next I will summarize JavaScript programming style according to this speech and his article code convention. The so-called programming ...

   JavaScript, programming style,Curly braces,Equal     2015-10-14 10:16:44

  Use CSS calc to align an element vertically

calc function is a function introduced in CSS3, it can be used to calculate length values. There are a few good features which make it suitable for aligning an element vertically. One good part is that the operands can have different units like percentage, px, rem etc. This makes it very flexible when calculating the length value. One example: .rect{ margin-top:20px; height:50px; background:green; width:calc(100%-20px); } Here the left operand uses percentage while the right one ...

   CSS3,CALC,VERTICAL ALIGN     2019-08-23 20:30:23

  Surface Pro available in mainland China on April 2

According to 36Kr, the Surface Pro will available in mainland China, Australia, France, Germany, Hong Kong , New Zealand and the United Kingdom starting from the end of March. Now the confirmed news is Surface Pro will be on sale in mainland China at 9:00pm on April 2 officially. The Surface Pro price in the United States is 64GB/$899, 128GB/$999. If it's the same in China, then the cheapest Surface Pro should be nearly ¥5600,the 128 GB Surface Pro will be up to ¥6200.Surface Pro configu...

   Surface Pro,China,Sale     2013-03-28 08:51:00

  10 design flaws of JavaScript

JavaScript's design took only ten days. Moreover, the designer didn't want to design it initially, he just wanted to complete the task assigned by company. It is now a very powerful client side programming language used in almost all the websites. It's an excellent language, but it also has some flaws. 1. Not suitable for large projects JavaScript doesn't have namespace, it's hard to be modular, there is no standard for putting codes in multiple source files. It allows defining functions with th...

   JavaScript, Design flaw, Object     2012-11-29 11:39:35

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