rejected master -> master (non-fast-forward)

As the error message says: git pull before you try to git push. Apparently your local branch is out of sync with your tracking branch. Depending on project rules and your workflow you might also want to use git pull –rebase.

What is the use of train_on_batch() in keras?

For this question, it’s a simple answer from the primary author: With fit_generator, you can use a generator for the validation data as well. In general, I would recommend using fit_generator, but using train_on_batch works fine too. These methods only exist for the sake of convenience in different use cases, there is no “correct” method. train_on_batch allows you to expressly update … Read more

“Missing return statement” within if / for / while

If you put a return statement in the if, while or for statement then it may or may not return a value. If it will not go inside these statements then also that method should return some value (that could be null). To ensure that, compiler will force you to write this return statement which is after if, while or for. But if you … Read more

This adb server’s $ADB_VENDOR_KEYS is not set

I uninstall my old android studio and delete folders from the previous installation. Then, I install the new version of android studio. But, I am having the same issue as the one on Android adb devices unauthorized Basically, the phone will not display a message which asked me to confirm. I found the adbkey.pub and adbkey … Read more