Zaratruta questions

• Data range expression for an enumeration in Protégé
• What is the difference between r+ and a+ in fopen?
• In which versions of the C standard are variable length arrays not part of the language, required, or optional?
• Why should we normalize data for deep learning in Keras?
• What is the difference between loss function and metric in Keras? [duplicate]

Zaratruta answers