2017-12-23

Write Machine Learning Algorithms From Scratch: Random Forest

IntroductionRandom Forest is a supervised classification algorithm, it can classify data according to various given features. Assuming that we want to determine whether a person is male or female acco

Journal

2017-12-17

My Last Weekend At Cisco

Today is my last weekend at Cisco, and I’m about to leave the company at the next Friday. My next employer is Alibaba, which is more cruel and fierce than Cisco, I’m not sure if this is the right choi

Coding

2017-11-26

Use Deep Learning to Detect Programming Languages

IntroductionThis post introduces a way to use deep learning to detect programming languages. Take the following code as an example. 12def test(): print("something") We will get an answer python if

Coding

2017-10-07

Right associativity in Scala

We define two methods here, ++ and ++: 1234567891011class Foo { def ++(n: Int): Unit = println(n + 1) def ++:(n: Int): Unit = println(n + 1)}object ValFunctionTest { def main(args: A

Journal

2017-10-06

Cast away on the moon

I watched a movie these days, it’s called Cast Away on the Moon(or 金氏漂流记 , 김씨 표류기). A man was saddled with debts of more than $20,000, and he couldn’t afford to pay it off. One day he jumped off a bri

Coding

2017-10-06

The difference between a case class and a normal class in Scala

What is a case class like12345678case class Person(name: String)object CaseClassTest { def main(args: Array[String]): Unit = { val person = Person("John") println(person.toString) &#

Coding

2017-10-05

Some Linux Commands

:-Take ${val1:-val2} for example, if val1 is unset or null, return val2, otherwise return val1. Example: 123456#!/bin/bashdefault="default"preset="preset"value="This is ${preset:-"$default"}

Coding

2017-10-03

newInstance in Java

IntroductionnewInstance is used to instantiate an instance of a class dynamically. Here is an example written in Scala. 1234567891011class Printer() { def print(): Unit = { println(s"pri

Coding

2017-10-02

When and how to use InheritableThreadLocal

Today I was reading Spark’s source code, and found InheritableThreadLocal in it. Little information could be found online about this class, so I decided to write a blog to illustrate how to use it, ba

Coding

2017-09-09

The difference between wait and sleep

wait and sleep can both be used to put a thread into sleep and wait for a while. So what’s the difference? To find it out, we need to figure out how to use them first. WaitTo use wait, you have to put

Archive: 2017