Alcott questions

• linux shell test `-d` on empty argument
• Comparison about balanced binary search trees
• figure out 2 strings similar or not
• cannot assign or copy iostream object?
• The return address in the assembly code
• Python pandas groupby aggregation
• `void *` to other pointer
• What are the differences between swap in C++ and Python?
• Image Recognition using Python [closed]
• [python]: problem about python string literals

Alcott answers