SEARCH KEYWORD -- Data security

  File System vs Core Data: the image cache test

Code for this project is on GitHub While doing a full re-write of Droplr's iOS app for the 2.0 launch, I couldn't find any good file/image caches out there had a particular feature I really wanted: extending item expiration whenever it's touched. I set out to write my own — which wasn't that much of a challenge — but somewhere along the process I had this crazy idea that perhaps (SQLite-backed) Core Data would be a much better tool for the job: No mismatch between cache index ...

   File system.Image cache,Multimedia     2012-02-01 08:52:02

  Measure the improvement of Google search algorithm

On the day of Google's 15th birthday, Google released its new "Hummingbird" search algorithm, this is the first time that Google changes its search algorithm since 2010 after the Caffeine algorithm. It will affect 90% of search results, according to Amit Singhal, Lead of Google Search. Some may be curious about how Google measures the improvement of a new search algorithm. There are many factors need to be considered, for example, accuracy, relevance, search depth etc. According to Amit Singhal...

   Google search,Algorithm, improvement     2013-09-29 23:25:53

  Learn these technical skills within one day

It takes days and days reading books, practicing and involving in real project if you want to learn a programming language well. It's just like a marathon, you will get more if you can insist longer. During this long and boring period, there are always something you can learn within a short period of time, like within one day. These skills can bring your big satisfaction. Below are a list of technical skills which you can pick up within one single day, they are advocated by Jacob Jensen, a Googl...

   Technical skill     2014-06-12 09:33:15

  How big is sizeof structure?

First let's see the codes of a structure: struct node{ int a; int b; }; Question : What's sizeof(node)? The answer is very simple, on a 32 bit machine, an int will take 4 bytes and two ints will take 8 bytes. So sizeof(node) is 8. The answer for the above codes is 8, then how about the following structure: struct node{ char a; int b; }; Question : Then what's sizeof(node) now? int takes 4 bytes, char takes 1 bytes, is the answer 5? Now the answer may not be 5, on some mac...

   Data structure alignment, pack     2012-10-29 12:13:37

  UIWebView Secrets - Part1 - Memory Leaks on Xmlhttprequest

My first blog post on iphone subject reveal a big memory bug when using UIWebView component. This is the (only one) component to display some HTML content in an iphone interface. UIWebView object has a lot of differents issues and I’m going to highlight the biggest of them. Actually, all XMLHttpRequests used in javascript code are fully leaking!!! I mean when you do a request that retrieve 100ko of data, your memory used grow up for 100ko! This bug is not always active, but almost always....

   XMLHttpRequest,Memory leak,Mobile device,UIWebView     2011-11-25 13:46:30

  Why Dynamic Programming Languages Are Slow

In a statically typed language, the compiler knows the data-type of a variable and how to represent that. In a dynamically-typed language, it has to keep flag describing the actual type of the value of the variable, and the program has to perform a data-dependent branch on that value each time it manipulates a variable.  It also has to look up all methods and operators on it. The knock-on effect of this on branching and data locality is lethal to general purpose runtime performance. T...

   Dynamic language,Slow,Analysis     2012-03-26 15:33:11

  What Is The Best SaaS CRM In 2024?

SaaS CRM entails that the CRM software is hosted and accessed through the internet. Definitely, this cloud-based approach means that both large and small companies alike can access higher CRM functionalities without the cost liability that comes with the in-house servers and their maintenance. Why CRM is Important for SaaS Businesses CRM systems are of special significance for SaaS companies; they help manage customer interactions, track sales, and improve marketing efforts while assured competi...

   CRM,SAAS     2024-05-21 04:37:21

  Jack Ma's interviews during Alibaba's IPO at NYSE

Alibaba has been listed on NYSE on 19 September. It becomes the largest IPO ever in the history of US stock exchange, larger than Facebook then the largest one. And after the trading closed on Friday, its share price closed at $93.89 per share, this makes it the second largest Internet company in the world following Google. Jack Ma, the founder of Alibaba, also becomes the richest person in China with a total wealth of $18.1 billion. He accepted interviews from different media during the IPO. Le...

   Alibaba,Interview,Jack Ma,IPO,Video     2014-09-20 20:09:27

  Four reasons we don’t apply the 80/20 rule

Why can’t we make more use of the 80/20 rule? I’ll review what the 80/20 rule is, explain how it can be powerful, then give four reasons why we don’t take advantage of it. What is the 80/20 rule? The 80/20 rule is amazing when you first learn about it. It says that efforts and results are often very unevenly distributed. You’ll get 80% of your results from the first 20% of your efforts. For example, maybe your top 20% of customers will provide 80% of your profit. O...

   80/20,Development,Profit,Revenue,Effort     2012-02-08 10:03:50

  Stanford Computer Science '10-'11 Salary Survey Results

CS/EE UndergradsData: I received 140 responses which described 360 job offers. 95% of the job offers were primarily located in the Bay Area, 5% were from the Midwest and East Coast. 10% of the job offers were from start-ups.Salary offers ranged from $64,400 to $100,000. The average salary offer was $79,914. The median salary offer was $ 82,200.About 70% of students were offered stock options. About 80% of students were offered signing bonuses. And about 60% were offered relocation assistan...

   Stanford,Computer science,Salary,Survey     2011-12-25 00:54:41

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