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How to get a reference to current module's attributes in Python
...obals() — Return a dictionary
representing the current global symbol
table. This is always the dictionary
of the current module (inside a
function or method, this is the module
where it is defined, not the module
from which it is called).
http://docs.python.org/library/functions.html...
sql primary key and index
...ou may reach the desired optimization for a query.
For example you have a table with many columns but you are only querying ID, Name and Address columns. Taking ID as the primary key, we can create the following index that is built on ID but includes Name and Address columns.
CREATE NONCLUSTERED I...
ORA-00979 not a group by expression
...ave a database like this:
FOO BAR
0 A
0 B
and you run SELECT * FROM table GROUP BY foo. This means the database must return a single row as result with the first column 0 to fulfill the GROUP BY but there are now two values of bar to chose from. Which result would you expect - A or B? Or shou...
How can i use iptables on centos 7? [closed]
... trying to open 80 port for httpd service, but something wrong with my iptables service ... what's wrong with it? What am I doing wrong?
...
OceanBase使用libeasy原理源码分析：客户端 - 数据库(内核) - 清泛网 - 专...
...个session
1.1 从IO线程的client_list(easy_hash_t)这个hash table中找出一个easy_client_t(封装一个connection的发起端)，对端地址是session->addr
1.2 如果要发送的session是一个正常的session，则设置其回调函数process后，返回这个client封...
Dismiss keyboard by touching background of UITableView
I have a UITableView with UITextField s as cells. I would like to dismiss the keyboard when the background of the UITableView is touched. I'm trying to do this by creating a UIButton the size of the UITableView and placing it behind the UITableView . The only problem is the UIButton i...
How to lose margin/padding in UITextView?
...
I had textviews in table, the ones that had single line of text didn't calculate its height correctly (autolayout). To fix it I had to override didMoveToSuperview and call setup there also.
– El Horrible
J...
How do I set the time zone of MySQL?
...ed timezones like 'Europe/Helsinki' means that you have to have a timezone table properly populated.)
Keep in mind that +02:00 is an offset. Europe/Berlin is a timezone (that has two offsets) and CEST is a clock time that corresponds to a specific offset.
@@session.time_zone variable
SELECT @@ses...
✔ Checkmark selected row in UITableViewCell
I am an iOS development newbie. I want to add a checkmark to my UITableViewCell when it is selected. The checkmark should be removed when another row is selected. How would I do this?
...
JPA or JDBC, how are they different?
...I used EntityManager and with the get methods could access the stored data table.
4 Answers
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