Cordova Installation on Mac

Here I list steps which I finish the Cordova Installation on Mac.

1. Install brew

If you already have homebrew, you can skip this step or you can uninstall brew first and then re-install.

JVM Memory Management (1)

Last week, we normally deal with lots of things related to performance. But we didn’t dig into it and check why the problem happened. So I decide to write a post to explain JVM Memory Management. I know there are many blogs which are talking about it. It is not a new topic, but I…

Akka (2) — Actor: life cycle & create an actor & send message & stop actors & kill an actor

Akka is a messaging system based on actor module(message should be immutable, this is to avoid the shared mutable state trap). So this post, we focus on talking about Actor…

Akka (1): Basic Introduction

Before we touch Akka, we should know what is Akka. Akka uses Actor model to provide a platform to build a correct concurrent and scalable applications. Here we notice two key words, one is concurrent, the other is scalable. (Here I haven’t think out a good example to explain it…

HBase (1): OpenTSDB Table Design

Why we need to learn OpenTSDB? Is it good study case for us to know how to design HBase Table? For me, I would totally say yes. There are many good optimizations which already are applied to OpenTSDB, this open source project. So this post will only say how does OpenTSDB…

Slick (3) — connection pool

Before talking into detailed knowledge about connection pool in Slick, we need to figure out two things: One is about Slick. Slick does not provide a connection pool implementation of its own. The other thing is about JDBC, which not provides asynchronous database driver for JVM…

Scala (17): JDBC connection pool with Hive

JDBC means Java Database Connection. So when we need to read data from database, we use JDBC to get connection between application layer and database layer. In fact, we can directly connect with database by JDBC, why we need to use connection pool. The…

Scala (15): Regular Expressions

In Scala, it supports regular expressions and provides API to implement it. Here we give example to show them one by one.

findFirstIn

import scala.util.matching.Regex
val pattern = "Scala".r // <=> val pattern = new…

Scala (5): Currying Function

Currying Function is to allow others apply some parameters to your function. In some scenario, some people can apply some arguments to the function and others do rest later. In this case, we can use currying functions.

// normal function:
def…