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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

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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

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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

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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"}

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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

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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