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  When will resizing be triggered in Java HashMap?

HashMap is one of the most frequently used collection types in Java, it stores key-value pairs. Ideally it expects to use hash table which expects the data access time complexity to be O(1), however, due to hash conflicts, in reality, it uses linked list or red-black tree to store data which makes the worst case time complexity to be O(logn).  Although collections are using data structures like arrays and linked lists, unlike arrays, they will dynamically resize when there is not enough spa...

   JAVA,RESIZE,HASHMAP,THRESHOLD     2020-05-02 20:41:19

  Top 3 Cybersecurity Trends to Watch Out for Today

One trend in cybersecurity that never changes is that it’s getting more important with every passing year. According to statistics, the number of cyberattacks and severity of the losses they incur are growing at an alarming rate. Every day about 24,000 of malicious mobile apps get blocked yet more pop up overnight. For a business today cybersecurity isn’t an option, it’s a necessary measure one needs to invest in heavily. And it’s essential to follow the trends and develo...

   SECURITY,CYBER SECURITY     2019-05-14 09:03:24

  On Employers, Portfolios, Commitment, and Cake

You might know from experience that planning for a wedding is no simple feat. In the months leading up to our wedding, my then fiancé and I spent countless hours planning and making sure that no detail was overlooked. Among our top priorities was finding a skilled baker to create a delicious and beautiful cake. On the recommendation of a friend, we considered a baker named Jennifer. We read her "culinary resume." We were impressed by her references and experience, and our initial conve...

   Career,Employer,Cake,Commitment     2012-02-17 07:48:19

  Faster than C

Judging the performance of programming languages, usually C is called the leader, though Fortran is often faster. New programming languages commonly use C as their reference and they are really proud to be only so much slower than C. Few language designer try to beat C. What does it take for a language to be faster than C? Better Aliasing Information Aliasing describes the fact that two references might point to the same memory location. For example, consider the canonical memory copy: void...

   C,Performance,Speed,Fortran,Criteria     2012-03-25 09:12:23

  How GitHub Works: Creativity is Important

We want to foster a creative environment. We love it when employees hack on side projects. It gets people excited. Excitement is contagious, and spreads easily from one project to another. Even if we’ll never make money on that side project, the excitement generated from it can bleed into things that will make us money. Alcohol It’s no secret that there’s more than a few people at GitHub who like to drink. I mean, we have four beers on-tap at the office in our kegerator. B...

   GitHub,HR,Creativity,Innovation,Recruitm     2011-08-19 07:46:07

  etcd installation and usage

etcd is an open source and highly available distributed key-value storage system and is commonly used in critical data storage and service discovery and registration use cases. It is focusing on: Simple: well-defined, user-facing API (gRPC) Secure: automatic TLS with optional client cert authentication Fast: benchmarked 10,000 writes/sec Reliable: properly distributed using Raft etcd and Redis both support key-value storage and can be set up in distributed systems. Also Redis supporst more key...

   ETCD,TUTORIAL,RAFT,DISTRIBUTED SYSTEM     2021-03-07 03:10:33

  Remove duplicated elements in JavaScript array

During interviews, one frequent question asked would be something like how to remove duplicated elements in a JavaScript array and how many different ways you can think of. The interviewee would also be asked to write the code down. In real applications, normally front end would not need to handle this case since normally it would be done by backend, but still it's necessary for front end developers to know different ways of doing this. This post will share some of the common ways to remove dupl...

   JAVASCRIPT,ARRAY,DUPLICATED ELEMENT     2018-09-21 22:32:10

  Multi-master,NoSQL and MySQL

The MySQL family has been innovating rapidly. New features need names and sometimes those names are confusing. Describing something as multi-master or a NoSQL solution has confused me.Multi-master requires one of conflict prevention, conflict resolution or faith. MySQL Cluster provides both conflict prevention and resolution as described in these great posts. Regular MySQL has minimal support for conflict prevention (auto-increment-offset can prevent insert conflict...

   MySQL,NoSQL,Comparison,RANT,Master     2011-10-17 11:30:42

  Top 5 Reasons Not to Use Hadoop for Analytics

As a former diehard fan of Hadoop, I LOVED the fact that you can work on up to Petabytes of data.  I loved the ability to scale to thousands of nodes to process a large computation job.  I loved the ability to store and load data in a very flexible format.  In many ways, I loved Hadoop, until I tried to deploy it for analytics.   That’s when I became disillusioned with Hadoop (it just "ain't all that"). At Quantivo, we’ve explored many ways to deploy H...

   Cloud computing,Hadoop,Analytics     2012-04-17 13:43:26

  People, processes and tools

Some years ago, one of my managers used to repeat this "Accenture truism" (or so he designated it): to fix or improve something, first you need the right people, then you need the right processes to help those people work together, then finally you need the right tools to support those processes. People, processes, and tools - in that order.This is even more true for tech startups than for corporations. As geeks, whenever we face a problem, we often start by looking for a tool to fix it. "Our te...

   Work,People,Process,Tool,Importance,Priority     2011-10-24 11:36:14

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