<p>If you are building your own modules or called codebase, it is common to split some huge functions as independent files. In other words, you may source functions in functions. In my case, I have a file named codebase, which includes many short functions. Also, I built some huge modules based on the codebase. However, when I keep improving the codebase, it is hard to update all huge modules to support the latest version of the codebase. So, the following code is really useful. Besides, it's a great way to prevent conflicts for the same name functions.</p>

<p>I ran a task on PythonAnywhere, fetching data and inserting to MySQL database in this code. Everything worked fine when I execute it manually. And when executing automatically, it showed finished in log file, but new data was not uploaded to database. Why?</p>

Adding quotations or special characters to elements in vector, I think this a really useful feature. Especially, if you write SQL in R, this will be handy to you.

By default, there is a review form on WooCommerce product page, but customers can’t reply and discuss. If you want to add a comment form or question/answer form, you may need to install some plugins like WooDiscuz. However, we can hack comment template to achieve this without any plugin.

<p>data.table is a popular library in R, powerful, efficient. But the join/merge syntaxes in data.table are not so straightforward.<br />The common syntax as below which referred  〈JOINing data in R using data.table〉.</p>

<p>Data scientists and data analysts are new and popular careers in these years, and DataCamp is a online education website providing programming, statistics courses about data science. You can start your first step to learn practical skills and knowledge on DataCamp, including web crawler, data cleaning, data visualization, and programming language like Python, R and SQL.</p>

<p>As the default templates of WooCommerce,  在WooCommerce預設佈景中,會員後台有一個頁籤是「下載」,但這個選項不是每個人都會需要。移除的方法很簡單,不寫要改任何的程式,也不用裝外掛,只需要到WordPress後台 > WooCommerce > 設定 > 進階 > 帳號端點 > 下載,原本的設定為「downloads」,對應到網址最後面的名稱,如https://aronhack.com/my-account/orders/。</p>

<p>Library, also called modules, packages in Python. In fact, it seems there is some difference between these words, but I haven't dived so deep. I don't think it really matters either. In short, packages mean collections of bulk code, like famous ones, Pandas, and NumPy.</p>

Outline <ol> <li>Add Likecoin Button To Medium / Matters / Vocus.</li> <li>Add Likecoin Button To WordPress.</li> </ol>