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What is the easiest way to remove all packages installed by pip?
...e requirements.txt).
pip freeze > requirements.txt
Now to remove one by one
pip uninstall -r requirements.txt
If we want to remove all at once then
pip uninstall -r requirements.txt -y
If you're working on an existing project that has a requirements.txt file and your environment has div...
How to float 3 divs side by side using CSS?
I know how to make 2 divs float side by side, simply float one to the left and the other to the right.
15 Answers
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How to detect a loop in a linked list?
...references to the list and move them at different speeds. Move one forward by 1 node and the other by 2 nodes.
If the linked list has a loop they
will definitely meet.
Else either of
the two references(or their next)
will become null.
Java function implementing the algorithm:
boolean hasLoop(N...
One DbContext per web request… why?
...uch as
LINQ to SQL's DataContext, and NHibernate's ISession.
Let start by echoing Ian: Having a single DbContext for the whole application is a Bad Idea. The only situation where this makes sense is when you have a single-threaded application and a database that is solely used by that single app...
Unit testing void methods?
...ually took place. e.g.
void DeductFromBalance( dAmount )
can be tested by verifying if the balance post this message is indeed less than the initial value by dAmount
Informational methods - are rare as a member of the public interface of the object... hence not normally unit-tested. However if ...
Using parameters in batch files at Windows command line
...ou can use
ECHO %~dp0
You can view the full range of these capabilities by typing CALL /? in the command prompt.
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Which parts of Real World Haskell are now obsolete or considered bad practice?
...read along while reading RWH is "What I Wish I Knew When Learning Haskell" by Stephen Diehl. It provides additional insight, but be aware, some sections aren't really newcomer friendly.
General remarks
Read the comments. They usually contain information whether the given paragraph/section is stil...
Knight's Shortest Path on Chessboard
...
What do you mean by unavailable move? A knight can reach any square right!?
– everlasto
Jan 21 '17 at 16:42
add a com...
What does Docker add to lxc-tools (the userspace LXC tools)?
If you take a look at Docker's features, most of them are already provided by LXC.
5 Answers
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Deleting an object in java?
...
You should remove the references to it by assigning null or leaving the block where it was declared. After that, it will be automatically deleted by the garbage collector (not immediately, but eventually).
Example 1:
Object a = new Object();
a = null; // after t...