轮回少年 书童

I\'m using macbook Air and using the iphone Simulator. I changed it to Retina 4 inch, and the screen...

I have a class Child that inherits from a class Parent. They both have a private instance variable n...

What are @JsonTypeInfo and @JsonSubTypes annotations using for in jackson ? public class Lion exte...

Is there a way to force clients to disconnect from PostgreSQL? I\'m looking for the equivlent of DB2...

This is my code: from django.shortcuts import render_to_response, get_object_or_404 from django.tem...

I asked PostgreSQL to explain my query. Part of the explanation was: table_name --> Materialize W...

I have a large read-only data structure (a graph loaded in networkx, though this shouldn\'t be impor...

I have this class public class Tooth { public string Id {get;set;} } And this custrom contro...

Is it possible to add a function for the sort? For example: df = df.groupby(\'path_md5\').agg(agg_di...

This is a pretty common question, but I could not find this part: Say I have this array list: List...

How to use thread_ts variable from def hi() method and pass it as an argument into def message_actio...

The company I work for develops a system in Delphi, that contains dozens of exe modules, and each of...

I don\'t know what I did. I think I updated my Ruby on Rails. After updating it, I always get error ...

For example, if we initialize vector f, the dimension in each direction is not specified. So, I am w...