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10 rules of PHP-masters
1. Use PHP only when it is necessary – Rasmus Lerdorf There is no better source than the creator of PHP, to learn what he can do. Rasmus Lerdorf created PHP in 1995. Since then, the language has spread like a wildfire rate in the developer community, incidentally changing the face of the Internet. However, Rasmus did not create PHP with these intentions. PHP was created for the needs of web development. As is the case with many other projects wi...
PHP,Master,Experience,Advice 2011-12-16 09:38:07
Lisp: It's Not About Macros, It's About Read
Note: the examples here only work with outlet lisp. Refer to your version of lisp/scheme’s documentation for how read works (and possibly other forms) I know it’s an old post by now, but something about the article Why I love Common Lisp and hate Java, part II rubbed me the wrong way. The examples just aren’t that good. The usage of macros is plain baffling, when a function would have been fine. The author admits this, but still does it. There’s a follow-up post wh...
How does computer boot up?
The whole boot process of computer can be summarized in 4 phases. 1. BIOS In the 70's read-only memory(ROM) was invented. The boot program is written into ROM, the first thing the computer does is to read and execute this program when it's powered on. The program in this chip is called "Basic Input/Output System" (BIOS). 1.1 Power-On Self-Test The BIOS will first check whether the computer hardware can fulfill the basic conditions for booting up, this process is called Power-On Self-Test...
An Object is not a Hash
Following my article A String is not an Error, I want to bring attention to an issue that similarly applies to JavaScript in general, but has special relevance in the Node.JS environment. The problem boils down to the usage of {} as a data-structure where the keys are supplied by untrusted user input, and the mechanisms that are normally used to assert whether a key exists. Consider the example of a simple blog created with Express. We decide to store blog posts in memory in a {}, indexed ...
Object,Hash,Node.js,JavaScript 2012-01-19 10:16:10
10 Tips To Make Your C Program Effective
The beauty of any code lies not only in finding the solution to a given problem but is in its simplicity, effectiveness, compactness and efficiency( memory ). Designing the code is harder than actually implementing it. Hence every programmer should keep a couple of basic things in mind while programming in C. Here we introduce you to such 10 ways of standardizing your C code. 1. Avoid unwarranted function calls Consider the following two functions: view source print? 1 void str_print( c...
C,Tips,Efficient,Speed increment,Recursi 2011-08-05 01:34:16
The Web Is Wrong
The Analogies Are Wrong Originally, web pages were static documents, and web browsers were static document viewers; there was text, some formatting, and images—if you could pay for the bandwidth to serve them. Hyperlinks were the really big thing, because they were the main point of user interaction—but what a powerful thing they were, and still are. Then along came CGI and Java, and the web was transformed: all of a sudden, a web browser became a way to serve interactive co...
Web,Feature,Static document,CSS,Text 2011-12-31 15:43:53
The Wrong Inequality
We live in a polarizing society, so perhaps it’s inevitable that our experience of inequality should be polarized, too.In the first place, there is what you might call Blue Inequality. This is the kind experienced in New York City, Los Angeles, Boston, San Francisco, Seattle, Dallas, Houston and the District of Columbia. In these places, you see the top 1 percent of earners zooming upward, amassing more income and wealth. The economists Jon Bakija, Adam Cole and Bradley Heim have done the...
Inequality,Blue inequality,Career,Earning 2011-11-01 07:14:14
Fujitsu CTO: Flash is just a stopgap
Flash is a necessary waystation as we travel to a single in-memory storage architecture. That's the view from a Fujitsu chief technology officer's office. Dr Joseph Reger, CTO at Fujitsu Technology Solutions, is that office-holder, and – according to him – flash is beset with problems that will become unsolvable. He says we are seeing increases in flash density at the expense of our ability to read and write data. Each shrink in process geometry, from 3X to 2X and onto 1X, ...
Flash,Memory,Bottleneck,Limitation,Futur 2011-08-12 07:31:34
Understand Virtual DOM
With the popularity of React, the internals and implementation of Virtual DOM has becoming top discussed topic in tech communities and interviews. This post will give an introduction of Virtual DOM and how to implement a simple Virtual DOM logic. How to understand Virtual DOM In early days, front end developers would update a webpage view based on the data status change(usually after making AJAX call). But it brings performance penalties when there is frequent update as it would cause page reflo...
JAVASCRIPT,DOM,VIRTUAL DOM 2019-12-07 23:43:04
Automatically Updating Charts for Additional Data in Excel
Excel shines at turning your data into charts—graphical representations of your data. You can easily create a chart based on a range of data in a worksheet. Normally, if you add additional data to your range, you will need to once again create the chart or at best change the range of cells on which the chart is based. If you get tired of modifying charts to refer to new data ranges, there are a couple of shortcuts you can try out. The first shortcut works fine if you simply need to...
Excel,Graph,Auto update,New data,Automat 2011-08-13 04:36:53
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