2016-09-30

Calculate $$\lim\limits_{n\to\infty}(1-\frac{\lambda_n}n)^n$$

I came upon the calculation of $\lim\limits_{n\to\infty}(1-\frac{\lambda_n}n)^n$ when I was reviewing Poisson distribution. Notice that $\lambda_n = np_n(n\in\mathbb{Z}{\geq 0}, 0\leq p \leq 1)$ and $

Coding

2016-07-17

Hexo Source Code Demystified

PrefaceHexo is an excellent static blog generator, I read its source code recently, and I think it’s worth sharing the inner mechanism of its source code. GeneratorWhen you run the command hexo genera

Journal

2016-07-04

The fee paid to freelancer is not refundable

About two days ago, I got a message from my phone that I was charged for ￥110.72. The money was taken directly from my debit card. At first, I thought the money was stolen using some high-end technolo

Journal

2016-06-15

I finished reading "The catcher in the rhy"

I finished reading “The catcher in the rhy” yesterday. I don’t think this is an excellent book. The main character in this book just hates everything. I have no idea why he thinks in this way, though

Coding

2016-06-15

install flash plugin in firefox on arch linux

First, install flashplugin. 1sudo pacman -S flashplugin Then if you launch firefox, you will find out that there’s no sound when playing flash in it. Launch it from the terminal, you will find out the

Coding

2016-06-08

connect to wifi via commandline on arch

I just spent hours connecting to the wireless network on archlinux today. Finally I resorted to various tools in commandline. Here’s how I do it. Make sure you run the following commands as root to av

Journal

2016-05-28

It's pretty hard to concentrate these days

Honestly I feel awful these days, it goes the same for yesterday. I created a task that I needed to code for at least three hours for my project every day, but while I was anxious, it was really hard

Coding

2016-05-26

shorten a string without cutting words

QuestionHow to shortening a string without cutting words? For example, I have a string called Hello World, whose length is 11. I want to shorten its length to less than 6, which would be Hello W, but

Journal

2016-05-25

my new goals and my new life

I feel pretty bad recently, and it occurred to me that what made me feel bad was not the world, it was me, myself. I have to do something to fill my brain with energy, so I add a new task today, to pr

Journal

2016-05-24

I struggled to finish my tasks today

Today I was in a pretty bad mood, but I still finished my tasks. Because I know, whether I’m in a good or bad mood, I have to live any way. And if I do nothing, things would become worse. In fact, if

Archive: 2016