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Best ways to teach a beginner to program? [closed]
...eedback, and you can demostrate loops, variables, functions, conditionals, etc. This page provides an excellent tutorial.
After Logo, move to Python or Ruby. I recommend Python, as it's based on ABC, which was invented for the purpose of teaching programming.
When teaching programming, I must se...
What is meant by “managed” vs “unmanaged” resources in .NET?
... Adding a bit more clarification: SqlConnection (or FileStream, etc) are managed resources which internally use unmanaged resources which GC is unaware of.
– jimvfr
Jan 17 '13 at 2:21
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When to use an interface instead of an abstract class and vice versa?
...kSorter
{
public bool compare(object lhs, object rhs)
{
// etc.
}
}
The problem with this is that you've unduly coupled together two concepts:
A way of comparing two items (what item should go first)
A method of sorting items (i.e. quicksort vs merge sort etc.)
In the above...
Give all the permissions to a user on a DB
...ll set the privileges on all relations: tables, views, indexes, sequences, etc. If you want to restrict that, filter on pg_class.relkind. See the pg_class docs for details.
You should run this function as superuser and as regular as your application requires. An option would be to package this in a...
What ports does RabbitMQ use?
...differently if changed by someone in the rabbitmq configuration file:
vi /etc/rabbitmq/rabbitmq-env.conf
Ask the computer to tell you:
sudo nmap -p 1-65535 localhost
Starting Nmap 5.51 ( http://nmap.org ) at 2014-09-19 13:50 EDT
Nmap scan report for localhost (127.0.0.1)
Host is up (0.00041s la...
Differences between distribute, distutils, setuptools and distutils2?
...the difference between venv, pyvenv, pyenv, virtualenv, virtualenvwrapper, etc?. (Yes, I know, I groan with you.)
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App Inventor 2 CustomWebView 拓展：高级版Web浏览器，完美浏览现代Web前...
...sed when something is long clicked in webview with item(image,string,empty,etc) and type(item type like 0,1,8,etc)
OnCloseWindowRequest(id)
Event triggered when a window needs to be closed
OnConsoleMessage(message,lineNumber,sourceID,level)
Event raised after getting console message.
OnDow...
Why JavaScript rather than a standard browser virtual machine?
Would it not make sense to support a set of languages (Java, Python, Ruby, etc.) by way of a standardized virtual machine hosted in the browser rather than requiring the use of a specialized language -- really, a specialized paradigm -- for client scripting only?
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Should functions return null or an empty object?
...p -- the throwing method needs to know more about where that ID came from, etc.
– Jacob Mattison
Oct 26 '09 at 18:50
(...
List files by last edited date
...most/some/? linux distributions. Some define it as an alias ll='ls -l' in /etc/bash.bashrc or /etc/.bashrc. Thus it may not work and it may not exists on OPs system. Use ls -l -Rt at least, as ls is a standard command as defined by posix. Or specify you meant alias ll='ls -l'; ll -Rt.
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