1. The support for EE is removed above Java11, so the Android SDK cannot be installed normally

Solution: There is no solution, downgrade it. Most people in the new Java version of the new special will not use it (one-sidedly said), JDK8 is very easy to use (~ If I can, I need to install Java13 ~)

2.Python’s “turtle” graphics library has poor support for 3.x, and even some cases will not be installed (mostly in Linux and Mac environments)

Solution: Find a circle, and finally saw a sentence in the prompt of Terminal, probably means

“There is a problem with the 40th line of setup.py”

Immediately opened, and found a function without parentheses (new features of Python3?), Immediately after adding, a set of “pip3 install -e packagefile” came to solve the problem.

3.MacOS 10.15 Catalina (currently the latest GM version), is not friendly to Anaconda3, and has more problems in terms of operating efficiency and package management

Solution: solution? What is the solution? Wait for the official release of Apple Uncle and the update of anaconda. What can I do, MacOS did not roll back harmoniously (somehow began to miss Windows?).

4.Ruby Gem must remember to change the domestic source!

Solution: Baidu, then change, recommend Alibaba Cloud or Tsinghua (of course, whatever the Chinese University of Science and Technology, do not choose).

5.Conda must change the domestic source! (Pip / pip3 is free, it will be better if it is changed)

Solution: Same as above, but Tsinghua is more recommended. The mirror image of Tsinghua had been offline once before, but this time the official Tsinghua official declared: “We have reached an agreement with the official!”

6. Gradle / Flutter must change the domestic source!

Solution: The method is still the same as above, but there is one point to note. Generally, Flutter’s Gradle will appear twice, once under the Android directory in the project, and once again in the Flutter’s tools directory. There is also a Gradle configuration file It needs to be changed, and in the Gradle of the project, in addition to dependency, there is “allproject”.

7.Mac users must use Flutter for iOS development. The process of cocoapods must be completed.

Solution: People who use Flutter must not be unfamiliar with “flutter doctor”, just remind, remember to follow the sentence “pod setup” after “gem install cocoapods” is completed.