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Category: Coding Stuff

URL Shortening

Two days ago, I had something that I really wanted to share with my friends, so I uploaded it to my personal file sharing server. But the sharing URL was long, about 60 characters. I thought, if I could provide a shorter and easier-to-remember sharing URL, probably more people will visit the shared file. But none of the existed URL shortening services satisfied my need. I end up making my own URL shortening system.

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OPT Application Status Estimation

Students under the F-1 visa usually apply for Optional Practical Training (OPT) to get work authorization from US Citizenship and Immigration Services (USCIS). When one application is received by the USCIS, they issue a receipt number. Using this receipt number to check one’s progress (here) is highly unsatisfying. The application usually takes up to 4 months to process. Until the work authorization is approved, students will only get a somewhat useless paragraph like this:

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