SEARCH KEYWORD -- Data type

  Fastjson just fixed a bug which might cause out of memory issue

Fastjson just fixed a bug which might cause service down a few days ago. This bug is caused by some mishandling of special character \x which is an escaped character to indicate hexdecimal number. The impact of this bug would be big if the attacker constructs a malicious data which would cause the service down.  The code which causes the issue is in com.alibaba.fastjson.parser.JSONLexerBase#scanString, when a JSON string is passed in, fastjson would parse the string character by c...

   FASTJSON,ALIBABA,BUG,NEWS     2019-09-07 06:03:49

  memcpy() vs memmove() in C

memcpy() copies the bytes of data between memory blocks. If the block of memory overlaps, the function might not work properly. Use memmove() to deal with overlapping memory blocks. memmove() is very much like memcpy() but very flexible as it handles overlapping of memory blocks. example : char msg[50] = "abcdefghijklmnopqrstuvwxyz"; char temp[50]; main() { strcpy(temp, msg); printf("Original Msg = %s\n",temp); memcpy(temp+4, temp+16, 10); printf...

   Memory,memcpy,memmove,C,comparison,diffe     2011-04-14 09:05:10

  Don't. Waste. Time.

Stuff we startups do that doesn't delight users:Office spaceLaunch partiesHealth insurance plansSalary negotiationsFounder equity splitsSeries F stockOffice Food Team-building activitiesCRM systemsBookkeepingHead countWorking in SOMAConvertible debt capsValuationsTechCrunchKarma scoresISOsPowerpointBusiness CardsBanksLawyersDesks1099sBug TrackersAgile ProcessesAdvisory BoardsHiringCap TablesPayrollMeetupsMeetingsOf course, much of this stuff still needs to get done.  At some point.&nbs...

   Time management,Work,Startup,How to     2011-11-21 09:55:06

  The Greatest Hacks of All Time

Reader's advisory: Wired News has been unable to confirm some sources for a number of stories written by this author. If you have any information about sources cited in this article, please send an e-mail to sourceinfo[AT]wired.com. In 1972, John T. Draper discovered he could make free long-distance phone calls using a whistle from a Cap'n Crunch cereal box. The whistle emitted a 2,600-hertz tone that got him into the internal authorization system at the phone company. With another noi...

   Hack,Greatest,All time     2012-02-29 05:05:42

  Tips for improving PHP efficiency

0. Using single quote to replace double quote to enclose string literal, this will be a bit faster. Because PHP engine will search variables in double quoted string. 1. If a method in class can be declared as static, then make it static, this will be 4 times faster. 2. $row["id"] is 7 times faster than $row[id] 3. echo is faster than print, and you should use multiple parameters instead of string concatenation, i.e use comma(,) instead of dot(.) to concatenate string. For example echo $str1,$str...

   PHP, efficiency, tips     2012-10-01 19:39:06

  10 Questions with Facebook Research Engineer – Andrei Alexandrescu

Today we caught up with Andrei Alexandrescu for a “10 Question” interview. He is a Romanian born research engineer at Facebook living in the US, you can contact him on his website erdani.com or @incomputable. We will talk about some of the juicy stuff that going on at Facebook, so let’s get started. Hello Andrei, welcome on Server-Side Magazine. 1. Tell us a little bit about yourself. Who are you? Where and what do you work? Who am I? Ah, the coffee breath of one talki...

   C++,Facebook,PHP,Future,Machine learning     2012-02-06 08:08:12

  GitHub launches a separate training page

Code hosting community Github has much proud data: 55 employees, Andreessen Horowitz promised a $100 million investment, $750 million valuation, a place developers stay longest since its launch in 2008 ... Github announced the official launch of a separate teaching page, to teach developers collaborative programming through various forms. Github announces the detail about the training program on its official blog, the entire training project has two modes : free and paid. The content of their t...

   GitHub,Training,Open source     2012-10-07 05:45:47

  One thought about JavaScript exception handle

Due to network, browser and cache issues, the JS executed in production may produce different results from the testing environments. Sometimes they may produce exceptions. Front-end developers may encounter this kind of exceptions frequently. But how to log and use them is seldomly considered by them. Actually, exception handling includes two steps : log and use. 1. Log Regarding to log error, this is relatively convenient, since in each browser, there is one interface called window.onerror. win...

   JaavScript,Log,Exception,Email     2013-03-18 12:50:21

  How expensive is a MySQL query?

Database access speed is always the bottle neck of many applications. Many application have large amount of data to search, retrieve and display nowadays. How do we improve the performance of our applications, how do we reduce the cost of database access? Apart from the design of database, the quality of the query is also one important factor to take care.  But before that, we need to know how much network traffic a query will consume. Yunyang,Zhang from Nubee in Singapore did some research...

   MySQL,Network traffic,Query     2013-04-09 05:13:33

  Chrome to block mixed content downloads in version 86

Google has announced its plan to block mixed content downloads in Chrome in February 2020 and now the day to block mixed content downloads is coming soon as we are nearing October when Chrome 86 is supposed to be released. What is mixed content downloads? According to Google, it is non-HTTPS downloads started on secure pages. For example, if you access a page called https://example.com/download, and in this page, there is a download link to http://download.example.com/something, ...

   CHROME,MIXED CONTENT DOWNLOADS     2020-09-18 21:10:53

RECENT