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How to import a Python class that is in a directory above?
... exists. Two dots means up one package level. Three dots is up two levels, etc. So if you execute from . import mod from a module in the pkg package then you will end up importing pkg.mod. If you execute from ..subpkg2 import mod from within pkg.subpkg1 you will import pkg.subpkg2.mod. The specifica...
Running a cron every 30 seconds
...ice.
Here is a simple example that logs "Hello World" every 10 seconds:
/etc/systemd/system/helloworld.service:
[Unit]
Description=Say Hello
[Service]
ExecStart=/usr/bin/logger -i Hello World
/etc/systemd/system/helloworld.timer:
[Unit]
Description=Say Hello every 10 seconds
[Timer]
OnBootSec=...
How do I close a single buffer (out of many) in Vim?
...point.. copy and paste a few lines of text to use as a template of sorts.. etc. I would type the following:
:bd txt <Tab>
Note that the matching string does not have to be at the start of the file name.
The above displays the list of file names that match 'txt' at the bottom of the screen...
Postgresql: password authentication failed for user “postgres”
...: password authentication failed for user "postgres" then check the file /etc/postgresql/8.4/main/pg_hba.conf: There must be a line like this as the first non-comment line:
local all postgres ident
For newer versions of PostgreSQL ident actually might be peer. ...
Pro JavaScript programmer interview questions (with answers) [closed]
...them about non-JS specific stuff like testing, workflows, version control, etc. to find out if they're a good programmer.
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Manual deployment vs. Amazon Elastic Beanstalk
...over maually creating EC2 instance and setting up tomcat server and deploy etc for a typical java web applicaion. Are load balancing, Monitoring and autoscaling the only advantages?
...
How to programmatically set style attribute in a view
...ssible to create a style for a button which defines the text size, margins etc etc and then apply this to a button programatically. Surely its possible say if I have six buttons which want to have the same style?
– Bear
Jan 7 '12 at 2:30
...
Scanner vs. BufferedReader
...t's able to give back you specific parts directly as int, string, decimal, etc. See also all those nextXxx() methods in Scanner class.
Reading = dumb streaming. It keeps giving back you all characters, which you in turn have to manually inspect if you'd like to match or compose something useful. Bu...
How do you create a static class in C++?
... static void myMethod() ;
} ;
// source
void MyClass::myMethod()
{
// etc.
}
But you must remember that "static classes" are hacks in the Java-like kind of languages (e.g. C#) that are unable to have non-member functions, so they have instead to move them inside classes as static methods.
In...
Difference between a Message Broker and an ESB
...most have to be business events (a sale, a renewal, a change of ownership, etc.) rather than something like RPCish "database updates."
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