摘要： 1. Introduction Few days ago I read a case study article about Processing Historical Weather. I founnd this article valuable for learning. It describe 阅读全文

摘要： 1. Cpp Cpp was famous as "C with class" before, which is not so precise today but still a good slogan. Cpp uses the most easy understanding way to imp 阅读全文

摘要： 1. Introduction When we have a project which needs to import data repeatly, we bascially have two choices: a. Luckly we have password to database. We 阅读全文

摘要： 1. Introduction Recently, I came across a group which has heavy SQL culture. They have many workflow base on history SQL code, waitting for people to 阅读全文

摘要： 1. Why do I care? Building a summary or pivot table table is very common in daily data analysis. We can use pandas.pivot_table or pandas.dataframe.gro 阅读全文

摘要： 1. Introduction Recently I notice a Go library called Excelize. It supplies many excel manipulations and it's similar to Microsoft's VBA. I have inter 阅读全文

摘要： 1. Introduction Scatter plot is a useful way to explore two variables relationship, but it also has a shortcome: we have to guess it's trend by our ey 阅读全文

摘要： 1. Introduction As an introduction, we will talk a little about why we need "sqlite". 1.1 Compare with other SQL (MySQL/ MS SQL Server/ ...)? Firstly, 阅读全文

摘要： This is an old article from my notebook. I find it very useful and often look back into it for work. I revise it again and post it here. Introduction 阅读全文

摘要： Introduction We have discussed in a previous article, in most common situation if we have to maintain two Arrays working consistantly, we should bette 阅读全文