Lines of computer code are read as the hidden logic beneath how things work. Writing it in a dream stands for problem-solving; being unable to read it, for rules that feel foreign.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.