Interview Practice 06 - Appearance Count of Numbers

Question 腾讯面试题: 给你10分钟时间,根据上排给出十个数,在其下排填出对应的十个数 要求下排每个数都是先前上排那十个数在下排出现的次数。 上排的十个数如下: 【0,1,2,3,4,5,6,7,8,9】 Solution 初看此题,貌似很难,10分钟过去了,可能有的人,题目都还没看懂。 举一个例子, 数值: 0,1,2,3,4,5,6,7,8,9 分配: 6,2,1,0,0,0,1,0,0,0 0在下排出现了6次,1在下排出现了2次, 2在下排出现了1次,3在下排出现了0次……

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it’s been a while since the last post. After coming to new york, I have been very busy on my study, personal projects and (of course) playing around. studying in new york university is harsh, but not as hard as i think. I met nice people, hanged out with…

Save Terminal from Process Completed in Mac OSX

What’s happening One day, when I opened up terminal as usual, it showed [Process completed] and just terminated. I could not type any thing, run any scripts and work on my project. Even worse, this made me unable to install programs into my computer because many installations need to…

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Caffeine has been a very useful app to instantly disable or enable the screensaver on mac. At least for me, I am using multiple computers in office and all of them except the one I am using will usually get idle. Getting into screensaver, however, is bad sometimes especially I…

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Detecting browsers of iPhone, iPod, iPad, Android and BlackBerry with JavaScript and PHP

To begin with, we need to understand that in the HTTP protocol, browser send its identity called user agent to the server to request the wanted webpage. Every browser has its only unique user agent value, and therefore we can check that value to identify the user browser. So, first…