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实现一个简单的服务端推方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...味着简陋，轮询数据库是不可以接受的，下面我们来看看如何解决这个问题。在这里我们放弃了传统的LAMP技术，转而使用Nginx与Lua来实现。
Modified Long Polling
此方案的主要思路是这样的：使用Nginx作为服务端，通过Lua协程来...
Why doesn't os.path.join() work in this case?
...d slashes at the beginning of path components, except when refering to the root directory:
os.path.join('/home/build/test/sandboxes', todaystr, 'new_sandbox')
see also: http://docs.python.org/library/os.path.html#os.path.join
...
创建增量同步Oracle物化视图问题 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...from t_mv_test@dblink_name;
这样，不管数据库A上的此表的主键如何变化，我一概不管。但是，有时必须要使用with primary key，例如跨库跨平台时。
物化视图对应的表上没有主键，如果需要索引可以另行添加。
最后小结一下，这个...
AWS Difference between a snapshot and AMI
...on't recommend them for beginners. An instance-store AMI is a copy of the root instance-store volume plus some metadata, all saved in an S3 bucket in a special format
EBS boot. This is probably what you are using. An EBS boot AMI is an EBS snapshot of the EBS root volume plus some metadata like t...
Unable to find valid certification path to requested target - error even after cert imported
...) - and the fact that your own identity also has a 'chain' of trust to the root - which is separate from any chain to a root you need to figure out 'who' you trust.
all turn on all debugging
ssl turn on ssl debugging
The following can be used with ssl:
record enab...
Network tools that simulate slow network connection [closed]
...e a public internet service on coffee shop wifi: sudo tc qdisc add dev lo root netem delay 500ms
– Sam Stokes
May 12 '10 at 21:21
7
...
Express res.sendfile throwing forbidden error
...press considers relative paths in sendfile as bad. Unless you specify the root directory parameter, as seen here: github.com/visionmedia/express/issues/1465
– Joe
Aug 6 '13 at 10:51
...
How do I make a Git commit in the past?
... your new commit. If you actually want your new file to be added via a new root commit (no parents), then you need something a bit different:
B---C---o---o---o master
git checkout master
git checkout --orphan new-root
git rm -rf .
git add path/to/file
GIT_AUTHOR_DATE='whenever' git commit
git ch...
Detecting when user has dismissed the soft keyboard
...gleAction: (shown: Boolean) -> Unit): KeyboardToggleListener? {
val root = findViewById<View>(android.R.id.content)
val listener = KeyboardToggleListener(root, onKeyboardToggleAction)
return root?.viewTreeObserver?.run {
addOnGlobalLayoutListener(listener)
listen...
How to do an INNER JOIN on multiple columns
...ave an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INNER_JOIN airports to_port ON (to_port.code = flights.tairport) WHERE ' at line 7
– Kiril
Mar 2 '10 at 21:26
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