Recently, I need to upgrade my English learning app on Android to use multiple servers. Previously, I used two servers already. However, the way I manage media files caused me a lot of headache. So, I decided to switch to DigitalOcean since they have servers around the world and the pricing is good ($5 for […]
Recently, I have a specific need to combine multiple files into one big file. The task is very simple. However, if I do it manually (combine over 32,000 small text files into one), it may cost me a day, or even more. How to combine multiple text files into one So, I decided to make […]
If you are like me, I have to deal with text a lot in my work. As a programmer, I need to find and match string. Recently, a friend of mine, who is an accountant gave me a list of books’ titles. Most of them are fine. However, there are some contains strange characters and […]
As an ESL, I usually wonder: “how many words I need to know to speak English well?”. I read somewhere that you don’t need more than 2,000 words to carry out 99% of daily conversations. 2,000 words don’t seem to be a lot and if I can learn 10 words a day, I can be […]