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What happens to a declared, uninitialized variable in C? Does it have a value?
...hen looking in a debugger - but strictly speaking, the compiler is free to do anything from crashing to summoning demons through your nasal passages.
As for why it's undefined behavior instead of simply "undefined/arbitrary value", there are a number of CPU architectures that have additional flag bi...
How to step through Python code to help debug issues?
...
Yes! There's a Python debugger called pdb just for doing that!
You can launch a Python program through pdb by using pdb myscript.py or python -m pdb myscript.py.
There are a few commands you can then issue, which are documented on the pdb page.
Some useful ones to remember...
Entity Framework select distinct name
How can I do this SQL query with Entity Framework ?
8 Answers
8
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Making a div vertically scrollable using CSS
...roll - This values forces a scrollbar, no matter what, even if the content does not exceed the boundary set. If the content doesn't need to be scrolled, the bar will appear as "disabled" or non-interactive.
If you always want the vertical scrollbar to appear:
You should use overflow-y: scroll. Th...
How to select multiple rows filled with constants?
...
In PostgreSQL, you can do:
SELECT *
FROM (
VALUES
(1, 2),
(3, 4)
) AS q (col1, col2)
In other systems, just use UNION ALL:
SELECT 1 AS col1, 2 AS col2
-- FROM dual
-- uncomment the line above if in Oracle...
ImportError: No Module Named bs4 (BeautifulSoup)
...o your system python can import it, but not your virtualenv python.
If you do not need bs4 to be installed in your system python path, uninstall it and keep it in your virtualenv.
For more information about virtualenvs, read this
...
How to set up tmux so that it starts up with specified windows opened?
How to set up tmux so that it starts up with specified windows opened?
20 Answers
20
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How can HTML5 “replace” Flash? [closed]
...5. There are those that suggest that HTML5 will one day supplant/replace Adobe Flash.
25 Answers
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FileSystemWatcher vs polling to watch for file changes
... production and test environments. I now consider it a convenience, but I do not consider it reliable. My pattern has been to watch for changes with the files system watcher, but poll occasionally to catch missing file changes.
Edit: If you have a UI, you can also give your user the ability to ...
How can I include a YAML file inside another?
...
No, YAML does not include any kind of "import" or "include" statement.
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