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How can I validate a string to only allow alphanumeric characters in it?
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I detest regular expressions. I know that I will never remember the syntax. Even if I study it, there will come a time soon when it's all forgotten again.
– Sentinel
Jan 14 '15 at 17:26
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What exactly is a reentrant function?
...the code holding the const reference being told.
7.4. Make sure the user knows your object is not thread-safe
Thus, the user is responsible to use mutexes to use an object shared between threads.
The objects from the STL are designed to be not thread-safe (because of performance issues), and thus...
How to convert Strings to and from UTF8 byte arrays in Java
...will not report any problems in the conversion. This may be what you want. If not, it is recommended to use CharsetEncoder instead.
– Michael Piefel
Aug 17 '11 at 20:57
7
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Step-by-step debugging with IPython
... ipdb.set_trace() ? In your code :
import ipdb; ipdb.set_trace()
update: now in Python 3.7, we can write breakpoint(). It works the same, but it also obeys to the PYTHONBREAKPOINT environment variable. This feature comes from this PEP.
This allows for full inspection of your code, and you have ac...
Response.Redirect with POST instead of Get?
...ctively changing 307 redirect into the more common 302.
So, as far as I know, the only way to implement something like this would be to use Javascript. There are two options I can think of off the top of my head:
Create the form and have its action attribute point to the third-party server. Th...
How to get the IP address of the docker host from inside a docker container
... wanted to connect to a remote xdebug server:
telnet 192.168.46.49 9000
Now when traffic comes into your Mac addressed for 192.168.46.49 (and all the traffic leaving your container does go through your Mac) your Mac will assume that IP is itself. When you are finish using this IP, you can remove ...
实战低成本服务器搭建千万级数据采集系统 - 更多技术 - 清泛网 - 专注C/C++...
...器。到了机器后再按照天或者半天分表，比如表名为 weibo_2013020101 、weibo_2013020112。weibo_2013020101表示2月1日上午一个表，weibo_2013020112表示2月1日下午一个表。光这样分了还是不够，1000w/2=500w，经不起压力扩展。我们还需要把表再...
How do I force Postgres to use a particular index?
...om_page_cost = 1;
EXPLAIN <query>; # May use index scan now
You can restore the default value with SET random_page_cost = DEFAULT; again.
Background
Index scans require non-sequential disk page fetches. Postgres uses random_page_cost to estimate the cost of such non-sequential...
Android YouTube app Play Video Intent
I have created a app where you can download YouTube videos for android. Now, I want it so that if you play a video in the YouTube native app you can download it too. To do this, I need to know the Intent that the YouTube native app puts out in order to play the YouTube app.
I could do this easiall...
Best practice using NSLocalizedString
...he existing string files as closely as possible to avoid having too big a diff when updating them.
Naming your strings
If you use NSLocalizedString as advertised:
NSLocalizedString(@"Cancel or continue?", @"Cancel notice message when a download takes too long to proceed");
You may end up defini...